How to make a concrete mixer with your own hands - visual instructions and drawings. Low-budget do-it-yourself concrete mixer The simplest do-it-yourself concrete mixer

It is impossible to start building a private house without the availability of all the necessary materials and tools. Everything should be carefully prepared in advance. Since the construction of houses always begins with laying the foundation, it is required to prepare a concrete composition. This can be done manually, but it is easier if you have a homemade manual concrete mixer at hand.

Figure 1. Schematic of a gravity concrete mixer.

If the device is purchased, then the money can be spent only because of the need to use the new equipment at a time. When the foundation is ready, the purchased concrete mixer is no longer needed. It is much more profitable to make a concrete mixer yourself. It is not difficult to make it, so if you wish, you can always do all the work.

How to make the right concrete mixer with your own hands

In fig. 1 you can see a diagram of a simple gravity concrete mixer. It even allows mixing dry screed mortars. The presence of a pipe-axis will make it possible to dissect the contents of the reservoir when it is being poured, which is associated with the provision of a forced mixing process.

This manual concrete mixer can be made by an ordinary hobbyist in 1.5-2 hours. Since milk cans are expensive, it is best to use a worn-out boil that has any fistulas or cracks repaired. Then you need to fix the cover as follows:

Figure 2. Construction of an electrically driven concrete mixer.

• pass a stick or a piece of pipe through the handle;
• pull it tighter to both handles of the container (bucket) using a rope or rubber cord.

The latter can be taken from devices that allow you to secure the load to the car roof rack. Welding can be used to strengthen the boil. The design does not involve the use of bearings or couplings made from pipe cuttings. For support, U-shaped recesses should be cut in the frame racks so that the axis can lie in them. The rotation of the structure will occur with creaks, but the mixing of the solution will be in good order.

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How to make a homemade manual concrete mixer

Also involves the use of a barrel. At first glance, it would seem that a manual device would require great physical strength to make concrete mortar. In the end, everything will depend on the degree of workload of the mechanism. At the same time, even a woman can cope with such a device.

You can make a homemade concrete mixer with a manual drive by completing a number of stages of work. The following tools and materials are being prepared:

Figure 3. A variant of a forced-type concrete mixer.

1. Tank (metal barrel).
2. Corner (50x50).
3. Drive levers (2 pcs.).
4. Bearing housings.
5. Flanges.
6. Bolts and nuts.
7. Blades.
8. Hatch (cover).

Having picked up a suitable tank, that is, a metal barrel, the lid of which is welded on one side, special holes are drilled for the shaft from both ends of the container. Instead of corners, you can use a thick rod. On the side of the top of the barrel, a rectangular hole should be made, cutting it out with a size of 25x30 cm. For the resulting hatch, a special cover is made, fastening it to the hinges. It can be closed using bolts and nuts.

Blades consisting of plates should be welded to the inside of the drum. The role of the shaft can be played by a steel rod with a diameter of 40-50 mm. The resulting unit is easy to operate. It is dug into the ground at the site, as shown in Fig. 2. Next, load all the ingredients into the container.

Having closed the hatch, they begin to mix everything well. In this case, it is necessary to make from 10 to 15 full revolutions of the shaft. This is enough for complete mixing of the solution. The composition is unloaded as follows:

1. Unscrew the bolts on the hatch.
2. Turn the barrel over.
3. Throw the ready-made solution into a special tank (bucket or wheelbarrow).

The resulting concrete solution will not be inferior to industrial samples of ready-made concrete, and a small number of revolutions will compensate for the speed of its mixing.

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Tools and materials for creating a concrete mixer with a motor

Concrete is obtained by mixing a number of components in the required proportions. You can make it by taking water, sand, cement and gravel. The mixer will help you mix the ingredients faster. Concrete can be used by laying the foundation, making a screed for the floor.

Since a concrete mixer is needed to prepare a concrete solution, you need to know how to make it correctly, what tools and materials you may need for this. The concrete mixer has a conventional structure, including the following parts:

1. Container for mixing components.
2. The axis that rotates the container.
3. Motor.
4. Basis for the tank.
5. Paddles stirring the solution.

When creating a concrete mixer, there is no need to understand complex devices and many different parts. A simple barrel can be used as a container. Starting to make a mixer, prepare the following tools and materials:

1. Barrel (200 l).
2. Drill.
3. Gas engine.
4. Fastening bolt with nuts.
5. Building corner.
6. Screwdriver set.
7. Hacksaw for metal.

A pre-prepared metal barrel must have a volume of at least 200 liters. The bottom of the container should not be removable, it is better to weld it using a welding machine, since it can accidentally move away from the body when the concrete mixer rotates. You can make a frame using a metal corner. The engine provides torque to the entire mechanism. You can install a gasoline engine with a power of 1300 watts. A motor from a drill mixer is also suitable.

The top lid of the drum must be securely fastened. Starting to manufacture a concrete mixer, it is necessary to determine the type of this device, since they are stationary or mobile.

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How to make a concrete mixer with your own hands? What materials and tools are needed for this? Many people who need a homemade concrete mixer try to make one from what they have at home.

This unit is needed for carrying out concrete work at a summer cottage or during the construction of various buildings. Many people cannot afford to buy branded cars, so people make concrete mixers with their own hands. Some of these structures, which are relatively easy to manufacture, will be discussed below.

How does a homemade concrete mixer work?

In practice, 4 main methods of mixing the solution are used:

1. Gravitational.
2. Mechanical.
3. With forced vibration.
4. Combined.

In the first method, the container with the components of the cement-sand mixture rotates and mixing occurs under the influence of gravitational forces. With this method, a large volume of mortar cannot be kneaded, and the quality of concrete at the exit is slightly more satisfactory. Therefore, this method is not widely used. But a do-it-yourself concrete mixer made using this method may well come up with a small amount of work.

With the vibration method of mixing the solution, the body of the machine does not move, and the mixer equipped with a vibrator creates a compression wave in the mixture of sand and cement. The result is high quality concrete. But this method also has a significant drawback - high energy consumption. For example, to obtain 18-22 liters of solution, an electric drive motor with a power of 1.3-1.5 kW is needed.

Mechanical kneading of the pure material is not used, but is used in a combined method together with gravity. Such a homemade concrete mixer consists of a vessel that rotates in a horizontal or inclined plane. Projections are made inside the structure that mix the solution. Such designs attract DIYers due to the ease of manufacture. Therefore, below are described mainly units of this type.

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How to make a simple manual homemade concrete mixer?

Its operation scheme is clear from Fig. 1. Any solution, even a "dry" solution, can be mixed in this design. Anyone who has experience with simple tools can do it. It takes 2-3 hours to assemble. Here is a guide to making such a unit:

1. An old milk can or boil is taken.
2. If there is a crack or fistula in it, then they are eliminated by electric welding.
3. A piece of pipe is threaded into the handle of the vessel lid and tied tightly to the handles of the can with a rope. You can also use a rubber band.
4. To fix the vessel on the axis, it is welded to it. If it is made of aluminum, then it is necessary to make the holding elements. For them, strips of metal with a thickness of 7 mm are used. The vessel is attached to them with screws.
5. In the bed, cut holes in the shape of the Latin letter "U".
6. The axis is laid in them.

If a barrel is used, then a horizontal unit can be made. To do this, a hatch is made in its lateral part for pouring the mixture, and the vessel itself is strengthened directly on the axis. The unit is installed on steel pipe legs.

Such a structure will rotate slowly, but the concrete will be well mixed. The only drawback that such a home-made concrete mixer has is the time for mixing the solution, from 4 to 20 minutes. Compared to the use of a shovel, this design has 4 times the performance. Rotating the axle manually is a little tedious, so you can connect an electric motor through a gearbox or belt drive. Its power should be 2.5 kW with a vessel volume of 50 liters.

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How to make a homemade forced mix concrete mixer?

This device will consist of such nodes as:

1. Bucket - made from an old barrel, the walls of which must be rounded off with a sledgehammer. This is to prevent cement and sand from accumulating in the corners of the vessel. For small portions of the solution, a tub can be made from 2 basins. In general, you can take plastic containers. They are fastened along the rim with a steel tape, which is tightened with a screw. The bottom of one bowl must be cut out so that the solution can be loaded and unloaded.
2. Steel gear ring (buy it).
3. Car flywheel.
4. Starter gear from the car.
5. Wheel hub.

Such a drive works like this. The flywheel rotates on an axle and the bucket moves with it. The second end of the axle is secured with a bearing no. 208-210, which is inserted into a clutch located in the hub. You can also make a vertical version.

To do this, a working vessel is screwed to the wheel with bolts, and the flywheel is welded to the hub. Then the clutch with bearings is attached to the flywheel, and an additional piece is needed to secure the neck of the vessel.

This structure can be connected through a gearbox to an electric motor - the result is an electric concrete mixer. The rotation speed is selectable in the range of 25-55 rpm. As the speed increases, the solution may spray out. The engine power is selected as follows: 20-25 watts per liter of solution. To be able to provide these indicators, you can use a belt drive. If we assume that the bucket has a volume of 200 liters, then an electric motor with a power of 1.3 kW is needed. Such a unit gives a good quality concrete mix and allows you to greatly speed up the process of construction work.

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How to make a concrete mixer from a washing machine?

Any old car can do this. It is important that she has an activator at the bottom of the case. It must be replaced, mounted on a shaft of suitable size. There is a thread inside the washing tub. Brackets (nuts), which are made in the form of the letter "P", are fixed on it. You also need to make a structure from a steel strip with blades that are rotated 90 degrees. All these parts must be arranged symmetrically so that there are no beats during operation. The drain hole must be plugged. Such an electric home-made concrete mixer has a low productivity, but it is quite suitable for small jobs. If desired, you can also make an inclined unit. For this, a frame made of steel pipes is welded, which has an inclined platform. Channels are welded onto it, and a washing machine is bolted onto them. The construction works in the same way as the vertical version.

A concrete mixing machine, or a concrete mixer, or a concrete floor is a construction device designed for self-preparation of high-quality construction mixture. Such a machine can be stationary and mobile, differing in purpose and principle of operation. To date, a do-it-yourself concrete mixer is a good option for a practical and convenient unit. Its production will require minimal financial costs.

Types of concrete mixers and how they work

A concrete mixer is a technical device widely used in modern construction conditions for the preparation of concrete or other cement-based mortar, and is represented by very different types or forms. Regardless of the typical characteristics and design features, the main function of a concrete mixer or mixer is to obtain maximum efficiency in the process of mixing all components.

Continuous concrete mixers

Continuous concrete mixers have a forced mixing process of all components. From a structural point of view, these units are the same, but the main differences are in the size, performance and shape of the mixing blades.

The principle of operation of a continuous concrete mixer is the forced mixing of the components of the solution

Continuous concrete mixing machines carry out a full set of all technological processes, represented by loading and mixing of individual components, as well as unloading the finished mixture from the unit, which is provided not only by production, but also by control equipment.

The diagram shows the device of a continuous unit

• 8 - continuous flow of mixture components is fed into the trough;
• 7 - blades fixed on shafts inside the trough at an angle of 40–45 °;
• 6 - shafts inside the trough;
• 5 - unloading gate;
• 4 - toothed pair;
• 3 - reducer;
• 2 - belt transmission.

The principle of operation of the mixer is based on loading a continuous stream of components with belt feeders or conveyors. The simultaneous supply of bulk components and water makes it possible to obtain a homogeneous and high-quality solution in the mixing tank, which is discharged through the unloading hole and can be loaded directly into a special vehicle.

Technical performance indicators of continuous mixers depend on the volume of the solution, which moves in a certain time in the direction of the axis, as well as on the size and angle of the blade part with the frequency of their rotation. The advantages of this type of concrete mixer are represented by the ability to prepare mortars and hard concrete in significant quantities, as well as the complete static nature of the body. The disadvantages include the need for a constant supply of components, and the inability to obtain a small volume of solution.

Cyclic action

Cyclic units differ in the loading of new components of the mixture only after the complete unloading of the ready-made solution. This type of mixing equipment is more mobile, and the level of productivity is determined by the quality of the loaded components and the total volume of the mixing tank.

Cyclic concrete mixers are more mobile

The main function of the cyclic device is to obtain high-quality concrete of movable, molding and rigid type with the presence of special additives. Units of this type can have a cylindrical or trough-shaped body with a shaft of vertical or horizontal orientation.

Mixing of the solution takes place using paddle shafts

• 1 - bearing;
• 2 - electric motor;
• 3 - frame structure;
• 4 - transmission of V-belt type;
• 5 - reducer;
• 6 - clutch;
• 7 - unit body;
• 8 - blade part;
• 9 - holder;
• 10 - opening for loading;
• 11 - shaft;
• 12 - pneumatic cylinder;
• 13 - shutter;
• 14 - unit discharge opening.

The principle of operation is provided by the rotation of the blades on the shafts in a mutual direction, which causes the inclusion of an electric motor and a V-belt transmission. Due to the extremely uniform arrangement of the blades on the shafts, such elements ideally fit into the free gaps. The components to be mixed are delivered to the inside of the working mixer through a lock-type hole, after which mixing takes place using paddle shafts and the finished mixture is discharged through a discharge hole controlled by a pneumatic cylinder.

The advantages of the most modern models lie in the high quality of mixing in a relatively short time period and in the possibility of using components with different densities, resulting in a high-quality ready-made composition. The main disadvantages of cyclic equipment are represented by the high cost and technical complexity of the transmission, which implies the provision of regular and competent maintenance of the unit.

Gravitational

A variant of the construction machine, characterized by the mixing of concrete mixtures by means of gravity. Gravity mixers are a drum that rotates around an axis of a horizontal or inclined type. A prerequisite for functioning is a strictly defined number of blade rotations, which prevents an excess of centrifugal force inside the drum.

The advantages of this type of concrete mixer are ease of installation and productivity.

Gravity mixers for construction are usually designed to prepare mixes that do not exceed one cubic meter. The modern mobile unit is very easy to transport. The most popular and widespread gravity models are concrete mixing plants in the form of traditional concrete mixer trucks.

The frequency of rotation in this type of concrete mixer is 20 rpm

• 1 - loading bucket;
• 2 - a pair of lifting drums;
• 3 - self-braking worm-type gearbox;
• 4 - flanged electric motor;
• 5 - mixing drum with blades;
• 6 - the steering wheel of the unit;
• 7 - output shaft of a three-stage reducer of cylindrical-conical type;
• 8 - ends of the rope, which covers the bucket;
• 9 and 10 - limit switches for turning off the electric motor;
• 11 - traverse;
• 12 - flanged electric motor;
• 13 - one-stage gearbox;
• 14 - fixing device.

Principle of operation: the blade elements inside the drum in the process of their uniform rotation are picking up, lifting and dropping down the prepared solution. The standard rotational speed in gravity concrete mixing equipment is limited to 20 rpm.

The undoubted advantages of any gravity mixer are represented by the optimal ratio of the weight of the installation and the total working volume of the tank, the simplicity and reliability of the design, the possibility of using large aggregates, as well as the very low energy load of such equipment. The serious disadvantages of such models include low versatility and the risk of not obtaining homogeneous hard mixtures.

Forced

Concrete mixing units of forced action are used in the production of not only mobile, but also rigid concrete of the molding type, and also allow the production of lightweight concrete with a significant amount of all kinds of additives. Forced mixers can be equipped with a horizontal or vertical shaft that fits into a trough-shaped or cylindrical body.

In such a concrete mixer, you can prepare solutions with different density indicators

In forced mixers, high-quality mixing of all components is ensured, and due to the versatility of the design, it is much easier to manufacture concretes, as well as solutions with different density indicators and level of mobility.

All components are loaded into the drum of the concrete mixer, thanks to the blades they are mixed, and a high-quality solution is obtained

• 1 - mixer body;
• 2 - frame structure;
• 3 - electric motor;
• 4 - unit control panel;
• 5 - sector-type shutter;
• 6 - drive handle for opening the shutter;
• 7 - protective element;
• 8 - drive reducer for shafts;
• 9 - belt drive protection;
• 10 - safety clutch;
• 11 - mixing shaft.

The principle of operation is based on loading all components into the drum and the ability of the blades to mix the components during rotation to obtain a homogeneous and high-quality mass of the finished solution.

The advantages of forced construction mixers are represented by high mixing quality, equipment reliability and its ability to function even in difficult conditions, as well as small dimensions and ease of transportation. The disadvantages include the lack of a maximum ratio of the weight of the equipment to the useful volume of the mixer, as well as the too high installed power of the electric drive.

How to make a concrete mixer with your own hands

Of course, mixing can be carried out in a trough using a conventional shovel, but this approach is very labor-intensive, which does not allow obtaining a sufficient amount of a homogeneous and high-quality mixture, and the consumption of components in this case increases significantly.

Self-production of a concrete mixer does not cause difficulties even in the absence of professional knowledge and special skills in this area. It is enough to familiarize yourself with the manufacturing scheme, prepare the necessary material and a set of tools, and also strictly adhere to the step-by-step instructions.

From the barrel

The design has a peculiar trajectory of movement, in the form of an axis of rotation, going through the tank strictly obliquely. Simple mortar mixers are able to function well at a temperature of at least plus 2 ° C, since the design does not provide heating of the mixture being prepared.

The design of such a concrete mixer is quite simple.

• 1 - metal barrel;
• 2 - base from a metal corner;
• 3 - shaft from the pipe;
• 4 - bearing system;
• 5, 6 - handle and handle;
• 7 - hatch cover;
• 8 - lock connection;
• 9 - rubber seal;
• 10 - loop.

The prepared solution moves between two walls, which ensures the simplicity and efficiency of regular operation. The barrel mixer is capable of mixing about three buckets of concrete solution very well in twenty turns.

Materials and tools:

• metal barrel;
• a set of hardware, represented by bolts, nuts and washers;
• bearings;
• fittings for the handle;
• standard metal corner;
• welding machine;
• electric drill;
• "Grinder" or hacksaw for working with metal;
• spanners;
• level, tape measure and marker.

1. Drill holes at the ends of the barrel for installing the shaft.
2. Install the bearings under the rotary handle on the outer part of the covers.
3. Cut a hole for easy extraction of the ready-made mortar.
4. Seal the door with rubber.
5. Fix the door with the hinges on the hinged latches.
6. Weld a supporting frame structure from metal corners.
7. Fit the shaft with sheet steel blades.
8. Install the shaft and rotary knobs.
9. Place the drum on a supporting metal structure.

If desired, the design can be supplemented with an electric motor, a gearbox for reducing torque, a V-belt and a moisture protection switch, as well as a wiring system. In operation, such a model of a concrete mixer is less stable, therefore, it requires mandatory provision of high-quality additional fixation.

From the washing machine

The construction mixer, made on the basis of a washing machine, has a fairly high performance. In the process of drum rotation, stable stability is required, but the presence of a certain dissonance is explained by the components of the solution, constantly shifting the center of gravity. For this reason, it is necessary to resolve the issue of a reliable base or frame for installing a concrete mixer made using a washing machine.

The most stable geometric figure is a triangle, which can withstand significant loads and retains its position well. The advantages of a concrete mixer, independently assembled on the basis of a washing machine, are represented by an individual selection of height, but the best option is a design with the lowest point of the container at a level of 50-80 cm. The volume of ready-made cement mortar directly depends on the size of the washing machine tank.

To ensure stability, you need to make a solid base for the concrete mixer

Materials and tools:

• welding machine;
• electric drill;
• standard set of screwdrivers;
• hacksaw for working with metal;
• container from the washing machine;
• metal corners or pipe for the manufacture of a frame frame;
• steel sheet for making blades.

If you want to make your own auger concrete mixer, you need to make a special shaft.

Step-by-step manufacturing process:

1. Seal the drain hole in the working washing machine of the activator type.
2. Make a swivel mechanism from metal corners or pipes.
3. Place the washing machine on the swivel tilt mechanism.
4. Install the frame on “legs” half a meter high to ensure maximum stability of the structure.

It is important not to rigidly fasten the tank around the perimeter of the frame, and installation on a canopy should allow tipping with an emphasis on the frame base. Such a structure is fixed on the basis of an activator-type washing machine with only four metal corners. The performance of the finished construction mixer is ensured by connecting the unit to a 220 V network.

From a flask

Traditional flasks of milk or paint can be an excellent base used in the manufacture of a compact concrete mixer. Technological capabilities make it possible to make a frame based on metal corners or pipes, as well as ordinary wooden blocks. As a rule, three buckets of concrete mortar can be made at the same time inside such a mixer.

Compact concrete mixer that allows you to prepare three buckets of mortar in one go

The flask must be positioned in an inclined position, using for this purpose four conventional rotating supports or a frame structure with an angle of 20-30 ° in relation to the horizon. Thus, the device is provided with the rotation of the unit in accordance with the longitudinal axis.

Photo gallery: the components of a homemade concrete mixer based on a flask

The flask makes a good mixing tank. Engine components Manual version The principle of operation of a concrete mixer Composite mechanism for a homemade concrete mixer

A homemade hand-held concrete mixer can be made in a couple of hours using a milk flask and almost any scrap metal for this purpose.

Materials and tools:

• welding machine;
• electric drill;
• screwdrivers;
• hacksaw for working with metals;
• metal flask;
• metal corners for the manufacture of a frame frame.

Step-by-step manufacturing process:

• Drill holes for handle installation.
• Pass the axle, equipped with a handle, through the holes drilled in the flask.
• Make a supporting metal frame.
• Place the machine on the frame.

Easy operation of a construction mixer is ensured by the mandatory balance of such a unit, so the axle is passed only through the center of gravity. The bushings for the axle can be ordinary plumbing couplings, and the stops are made by welding to the axial part of the nuts lubricated with lithol or grease. This option is very simple in operation, but a large amount of solution is not mixed well and quickly enough.

Concrete mixer options for self-production (with drawings)

There are several easily feasible independently options for construction mixers, which have proven their high efficiency in the preparation of concrete solutions of different volumes.

Mechanical option

The main advantage is a sufficiently large volume, and both electric and manual drives can be used for equipment. The unloading of the finished composition is carried out by the traditional inclination of the structure to one side.

The main disadvantage of such a cylindrical bucket is the insufficiently high-quality mixing of the solution in the corner zones and the risk of spraying the mixture with too much speed of the structure. The model is capable of mixing a simple mixture within five minutes, and mixing dry components takes no more than ten minutes.

Combined horizontal version with combs

Electric or manual cylindrical tank design with high uniformity and excellent mixing speed. The device also has a high speed and quality of the solution preparation procedure. To mix one batch of mortar, it is enough to perform only four turns of the handle.

Combination type concrete mixers have good mixing speed

The disadvantage is the structural complexity and a large number of components, and the installation of an unloading hatch with high-quality and very reliable seals, latches and hinges requires increased attention.

Combs are made from conventional metal corners

For the manufacture of the comb, metal corners should be used, which are securely fixed to the base.

For reliability and stability, it is recommended to make a base under the concrete mixer

To weld the side posts, struts, channels cut into separate elements, as well as strong metal corners are used.

Electric option

The most common and demanded construction of a construction mixer, most often done by hand. To date, a huge number of variations of such a unit are known, which may have some differences in terms of design and technical characteristics.

Such a construction mixer is a way to ensure a considerable yield of the finished solution.

The best option is considered to be the use of a cylindrical tank, in which the bottom part and the neck must be reinforced with cross-welded strips. Such a frame electric concrete mixing structure, reliably welded on the axle, is characterized by high productivity and a sufficient output of the ready-made mortar.

The assembly of the container rotating with the axial element can cause some difficulty, due to the need to make a high-strength frame structure. Nevertheless, it is precisely due to this technical feature that the electric concrete mixer can be operated for as long as possible.

Vibrating option

In the presence of a perforator with a power rating of 1.0-1.3 kW and a percussion forced mechanism, it is quite possible to make a home-made vibrating concrete mixer.

In this design, it must be taken into account that the distance to the bottom must correspond to the radius of the unit

When making such a structure, it must be remembered that the tank used must be round and high, not very wide, located on the axis. The standard distance to the bottom should match the radius of the unit. It is strictly forbidden to use any flat containers made of sheet metal. In such a reservoir, there is no excitation of waves necessary for mixing the solution. The best option is to use a pair of metal plates stacked together, and the diameter of the vibrator should be a quarter of a meter for every 1.3 kW of power.

Modern barrel version

An interesting design from the point of view of technical characteristics, which can easily be made in accordance with the step-by-step illustrations below. It is necessary to prepare a two-hundred-liter barrel, an electric motor of 250 W and 1430 rpm, as well as a wheel from a regular motorcycle, two belts and a couple of rings welded together. The pulley is welded securely to the bottom of the tank. The frame structure is made on the basis of a channel and a strong metal tube.

Photo gallery: making a concrete mixer from an ordinary barrel

An ordinary barrel is suitable for making a concrete mixer. Part of the drive mechanism Fastening metal sheets to the frame Preparation of the base for a concrete mixer Installing a concrete mixer on a base The concrete mixer is ready to work The construction unit can be equipped with an engine Engine drive belt Tank with blades for mixing the components of the solution Concrete mixer at work

Video: homemade concrete mixer at work

Video: making a concrete mixing unit from a barrel

Thus, the standard ready-made construction of a self-made construction mixer is represented by a stationary or mobile bed, mixing working elements, a tank for the direct mixing process and an unloading mechanism. Also important parts of the design are the transmission and the gasoline or electric propulsion unit.

It is not difficult to carry out an effective concrete mixing unit on your own, but it should be remembered that the distance from the gears to the pulleys should be as competently verified as possible even before the installation work. The impossibility of connecting a grounding contract to a concrete mixer is leveled by the electrification of the device by means of a standard RCD, and all moving internal parts must be equipped with protective covers. The starting start of the concrete mixing machine is carried out in idle mode, but the preparation of the first concrete solution should not amount to the full load of the device.

It is even difficult to imagine any kind of construction site without technological processes using cement mortars. And for the owners of their own country house, with their constant state of "permanent" repair and improvement of the territory, concreting is generally a very demanded operation - either the garden paths should be poured, then the foundation for the gazebo, then the blind areas should be renewed, then the fence should be put up ... In a word, literally on each step requires the manufacture of concrete - the only difference is in the scale of the event.

Many individual builders prefer not to fool around with self-mixing the solution - this can be avoided if there is a concrete goods plant or other enterprise nearby that provides services for the manufacture of concrete and its delivery to the place of work. But, firstly, it costs a lot of money. Secondly, such an opportunity is not present everywhere. And, thirdly, it does not always make sense to resort to such services for reasons of the small scale of the construction or repair task - it will be either simply ridiculous or extremely unprofitable. It's easier to make the right amount of solution yourself. This, of course, can be done manually, but it is better to purchase (rent) a concrete mixer or show yourself as a real owner: for the future, make yourself a concrete mixer with your own hands.

The article will cover several homemade models concrete mixers - from the simplest to those that already differ little from the samples presented in stores.

A brief excursion - what are the types of concrete mixers

By and large, you can cook without any tools at all. Some masters even like to work like this, "the old fashioned way", mixing cement nt with sand and with other components (if necessary), and then gradually adding the required amount of water. Used for this are large containers with low sides, factory-made or even home-made, hammered from boards and sheathed with thin metal.

Some people prefer to do without containers at all, preparing the solution simply on a prepared flat area. However, in any case, the procedure for mixing with a shovel or a hoe, first of the dry components, and then with water, is a very laborious process that takes a lot of energy even at the preliminary stage, before the start of concreting. And if the work is planned on a fairly large-scale, then this approach will not justify itself.

Prices for concrete mixers Whirlwind

Concrete Mixer Whirlwind

Construction mixers or drill attachments - they are more suitable for dry construction mixtures or composite polymer materials. Sand with cement for them is already a rather difficult "test", and if there is still a need to add gravel, crushed stone or expanded clay of a coarse fraction, then the mixer or drill can be safely put aside: not only can you not achieve a high-quality, homogeneous batch, so also and there is a great risk of overheating the gearbox or electric drive of the device.

Concrete mixers (concrete mixers) cope with this task, which differ not only in size, capacity and drive power, but also in the principle of their action.

Forced mixing principle

Forced principle - mixing of the components of the solution is carried out in a stationary container. It is carried out due to the circular movements of the shaft with blades connected to a mechanical drive. (Working with a construction mixer or a drill with a nozzle can also be safely attributed to the forced mixing principle).

The layout of the installation can be different. So, the working drum can be a vertically located cylinder of small height, in which the blades-blades rotate on the vertical axis (as in the figure above).

Another option is when the container itself is located horizontally, and the shaft with blades is also oriented in the horizontal plane. Below is a schematic diagram of such a concrete mixer - who knows, perhaps for someone it will serve as a prototype for self-production.

In the drawing, the numbers indicate:

1 – drum body in which the solution is kneaded.

2 - the frame on which all the units of the unit are mounted.

3 - Electric drive. In this case, with such dimensions of the mixer, the power of the order of 5 ÷ 6 kW will be optimal.

4 - control and management elements: toggle switches, indicator lamps.

5 - Bottom hatch (shutter) - for unloading the ready-made solution into a container placed from below.

6 - lever for opening the shutter.

7 - safety grid installed during mixing.

8 - gearbox for transmission of rotation from the electric drive to the working shaft.

9 - protective cover of the belt drive.

10 - safety clutch.

11 - a working shaft with blades installed on it for mixing the solution.

The unloading of the ready-made solution can be organized according to a different principle - the working drum is not rigidly attached to the bed, but hinged. When mixing concrete, it is not locked in the working position. And in order to extract the ready-made solution, the container removed from the stopper, and with the help of a special lever it turns in the suspension trunnions. In this case, the solution is discharged into the substituted container through the upper loading hatch.

Compulsory concrete mixers allow achieving very high levels of homogeneity of the solution. They are actively used in industrial conditions, in construction, in private practice. However, they are not devoid of quite significant drawbacks:

• In the working container, it is often impossible to avoid the creation of "dead zones" - along the walls, especially in the corners. It is not easy to fit the blades with a minimum clearance to the inner walls of the cylinder, especially since under such conditions there is a constant increased wear of the rubbing parts.
• Structural complexity - reliable hermetic protection of the units in the rotation (bearing blocks) on the working shaft from the aggressive action of the cement mortar is required.
• It is almost impossible to prepare a solution with a medium or coarse filler in such a concrete mixer. But on the other hand, for plastering and finishing works, using ready-made building mixtures, this is the most optimal option.

Gravity mixing

The gravitational principle of mixing - the components of the solution are mixed under the action of their own gravity. A good example - put two different products in a glass jar, for example, two types of cereals, close the lid and start rotating - stirring will begin.

It is clear that such an approach in its "pure" form does not provide a high-quality preparation of the solution, or it will take too much time to achieve an acceptable consistency. In industrial conditions, this method is not used, but for household needs a small simple concrete mixer can be made.

The drawing shows the can - it is convenient from the point of view of tightly closing the lid. But, in principle, almost any container can be used if the owner thinks over the issue of its reliable closure while the solution is mixing well.

The axis of rotation can be fixed outside the container - in this case, it is not necessary to ensure the sealing of the assembly when it passes through the wall. But nevertheless, it is better to make it through - such an artificial obstacle during gravitational mixing of the solution will somewhat increase its quality.

On the Internet, you can find many interesting solutions for the manufacture of such simple concrete mixers from available tools. Very often old iron barrels are used. Making a stand - probably not a single good home craftsman will have any special difficulties.

The most difficult thing is, probably, again, to think over the issue of a tight-fitting hatch, which, when open, will allow loading the components of the mixture and pouring water, and when closed, with stirring, it will not allow the liquid solution to leak out. The approaches here can be different, but most often they use a door on welded hinges, the opening for which is sealed with rubber around the perimeter.

Some creative craftsmen complicate the design somewhat in order to improve the quality of concrete mixing. So, for example, to increase the amplitude of the differences in height, the barrel can be positioned not along the "correct" axis of the cylinder, but diagonally.

It is, of course, somewhat more difficult to rotate such a concrete mixer, but on the other hand, the homogeneity of the mixing of the solution will be achieved faster.

Combined principle

So, it was mentioned above that the gravitational principle of mixing in its "pure form" does not differ in productivity and high quality of mixing. Objections are probably heard - after all, it is believed, and many sources claim that most of the usual concrete mixers with a rotating drum located at an angle use the gravitational principle. One can agree with this, but only after making one very important remark.

In such mixing devices, blades are necessarily rigidly fixed on the inner surface of the working drum. Their configuration and size were thought out by the designers. When rotating, these blades move relative to the solution tending downward under its weight. Thus, in this case, it would be more appropriate to talk about the combination of two principles - both gravitational and compulsory. Indeed, this is exactly how the vast majority of cooking devices are arranged.

There are several advantages:

• No sealing is required, neither the drum itself (it is constantly open at the top), nor the rotation unit (since no contact with the solution is assumed here).
• The wear of parts is much less.
• Such concrete mixers are simple and reliable in operation, easy to maintain.
• There are practically no restrictions on the component composition of the solution - you can use crushed stone, gravel, expanded clay, etc.

The manufacture of a concrete mixer of this type will be discussed in more detail.

By the way, let's go back for a minute again to those unpretentious concrete mixers-barrels, which were mentioned above. If you show a little ingenuity, then they are also very easy to modernize, dramatically improving both their productivity and the quality of the mixed solution. To do this, it is enough to also triple the blades or some other artificial obstacles on their inner surface.

One of the options is shown in the diagram. In this case, a comb is used, which is easy to weld from a corner and by cutting a reinforcing bar. Two such combs will immediately transfer the concrete mixer from the category of gravitational ones to the "family" of more advanced, combined ones.

Vibration mixing of solution components

Not so often, but still some enthusiasts try to apply the principle of mixing concrete mortar using vibration. In industrial conditions, such installations give excellent results, they are used for the manufacture of particularly precise reinforced concrete parts with the highest performance characteristics.

And at home, craftsmen try to use a powerful drive as a drive (the main thing is that its vibrational action is independent, does not require pressing the cartridge against the obstacle).

It turns out something like this:

1 - the body of the container in which the components of the solution are mixed. Preference is given to round, not too large in radius, but high buckets (barrels).

2 - a bracket is rigidly attached to the body, in which the vibration impulse generator is located, in our case, a perforator (item 3).

The power of the rock drill must be at least 1.3 - 1.5 kW. Even this will not guarantee success, and with less drive effort, it is not worth trying.

A long stem (pos. 4) is inserted into the hammer chuck, which is connected to a vibrator (pos. 6). This rod should be of such a length that the disc vibrator is approximately in the center of the layer of the prepared solution in height (pos. 5).

It seems that everything is simple, but such a scheme does not always show good results. Mistakes, most often, lie in neglect of seemingly small nuances:

• A flat vibrator will simply not work. A shape is needed that will propagate vibrations in a dense medium from a central point almost spherically to the periphery. There should be something spindle-shaped, like two plates connected together with the bottoms outward. In principle, this is one of the solutions - two metal plates mounted on an axis.
• The vibrator diameter depends on the drive power. When calculating, you can proceed with their approximate proportion: 150 ÷ ​​200 mm per 1 kW of perforator power. So, if we take a 1.5 kW perforator, then we prepare "plates" from 225 to 300 mm in diameter.
• The diameter of the cylinder itself should be such that from the outer edge of the vibrator, located exactly in the center, to the wall of the container there is a distance approximately equal to the radius of the plate.
• To create vibration waves capable of coping with the mixing of the cement-sand mixture, the level of the solution above and below the vibrator must necessarily be approximately equal to the diameter of the "plates".

Vibration mixing of concrete mixes gives excellent mortar quality. The process is very easily monitored visually - from active stirring, movement, bubbling - to a smooth, rippling surface (ready-made solution). But, you must admit that for this you need to observe a lot of specific "whims". And yet - "heavy" solutions with gravel or gravel in this way are also problematic to prepare. So this method does not find wide application among private traders - it is easier to make a concrete mixer according to the "classical" scheme.

Independent production of a "classic" concrete mixer

It is necessary to immediately warn the "hotheads" - not everyone can take up the manufacture of such a concrete mixer. Although in many articles there is a "bravura motive" that it is both easier and cheaper than buying a ready-made one, it is still not worth believing.

- Firstly, you should not start such work if the owner knows about the art of welding only by hearsay or does it in this field.

“Secondly, the work will turn out to be profitable if most of the components for the manufacture of a concrete mixer can be found among unnecessary things in your own household, from neighbors or even at a landfill.

- Thirdly, the existing experience in design, production of locksmith, welding, electrical work and available inexpensive or generally free materials should be multiplied by the expressed desire to make a concrete mixer yourself. There is a fairly large category of people who can't wait to try to do everything with their own hands - this is a task for them. If you start work without fulfilling such conditions, just cherishing the ephemeral hope of saving something, then it is better not to start. Time and materials will be wasted, and it will be much cheaper and easier to purchase a small and inexpensive concrete mixer - fortunately, the choice is quite large.

If we consider almost any of these concrete mixers, then three main structural units are always clearly distinguished:

• The container (bucket) itself, in which the solution is mixed, with all additional mixing devices located in it.
• Frame (bed, frame), which serves to accommodate a mixing bucket, electric or manual drive, controls and, if necessary, means of movement. The frame should provide a movable hinged fastening of the container, the degree of its freedom both around its own axis and relative to the horizon with different angles of inclination. The structure itself can be stationary, or it can be wheeled to move around the construction site.
• Drive - a mechanism that rotates the mixer container around its axis. In most cases, an electric drive is used. For small concrete mixers, a manual drive may be sufficient. It is possible (infrequently) to find options for installing internal combustion engines (gasoline or diesel) - then the concrete mixer will not be dependent on the power source. Any drive transmits the torque with the required number of revolutions for the mixing technology through the gearbox (there are no restrictions - the craftsmen use any types of gears - gear, belt, worm gear, etc.).

Now let's look at the manufacture of all these nodes separately.

Mixing bucket

In the manufacture of a mixing tank, it is assumed that during operation it usually fills up to a maximum of 30 - 40% of its total volume. Usually these buckets are made with a volume of 100 to 200 liters. If you exceed these limits, it will be difficult to independently create a reliable stable frame and provide a homemade concrete mixer with such a powerful drive. With small tank volumes, both assembly and operation of a concrete mixer often become simply unprofitable.

Prices for concrete mixers Enkor

concrete mixer Enkor

The easiest way, of course, is to find a ready-made container that is suitable in volume and dimensions as the main mixer. Immediately begs for behold the same metal barrel.

This option is quite possible, however, for a good concrete mixer, the cylindrical shape of the bucket is not optimal. A lot of unmixed solution can remain in the corners around the bottom, and from above it is possible that the solution will splash outward while stirring.

Making a smooth transition from d to the walls is a very difficult task, but probably any master can give the barrel a pear-shaped shape. Triangular cutouts are made on top, and then the remaining "petals" are welded so that a uniform narrowing is obtained.

An interesting solution was found by a craftsman who decided to adapt a plastic barrel. Why not? Smooth curves of the shape - what is required for the capacity of a concrete mixer. It is quite possible to attach the blades to its inner surface, and from the outside from below - an axis with a rotation transmission mechanism, it is quite possible not by welding, but by screw connections. But what a huge gain in the mass of the device itself!

As a result, the designer of this model even managed not with a steel frame, but with a mobile wooden base - a trolley on wheels.

The height of a standard barrel for using it as a container for a concrete mixer is still too large, complicating the centering of the entire unit. Please note that in such cases, support rollers are usually used for stabilization - a high bucket, as it were, rolls along them, resting on its upper part.

If there is no suitable container, but sheet metal with a thickness of 2 ÷ 3 mm is available, then you can try your hand at making a container yourself, giving it all the necessary shapes.

In order not to be unfounded, for those owners who consider themselves a master in welding, we can offer an interesting drawing for the manufacture of a "classic" concrete mixer with a drop-shaped bucket.

The general dimensions of the tank, without the connection unit with the gearbox, are 400 ÷ 500 mm. It would seem - a little, compact, but even only in the cylindrical part about 30 liters of solution is placed - quite an acceptable indicator for a household concrete mixer.

1 - car wheel hub. You can make this part yourself, but it's still easier to use the finished one.

2 - the bottom of the bucket. Cut from sheet steel, preferably 5 mm thick. The figure below shows this position separately in an enlarged view. Holes (8 PCS, diameter 6.5 mm) must match exactly with the holes in the hub (pos. 1 ).

3 - the cylindrical part of the tub (shell) is welded from a steel strip bent into a ring, 2 mm thick, dimensions 150 × 1580 mm. All welds during the assembly of the bucket are made solid, airtight. It is advisable to reinforce the shell from above with a metal band ( ribbon).

4 - the conical part of the tub is welded from four identical parts. Their sizes, including the radii of curvature at the top and bottom, are shown in the figure.

5 - along the upper edge, the edge of the tub is flared outward, and on circle, a steel rod with a diameter of 10 mm is welded (well shown in the diagram - a node A ).

6 - inside the bucket "blades" are welded - solution dividers. In this case, the structure shown in the diagram, made of a reinforcing bar with a diameter of 16 mm, will be quite enough. 3 pairs of such dividers are made and welded evenly around the circumference, every 120 °. By the way, they should give the bucket additional strength. Each pair has one straight divider coming from the bottom in the neck, and one bent at a right angle.

Lower node ( B), which includes the already mentioned hub and bottom, is better shown in a separate, enlarged drawing.

7 - bolts connecting the hub to the bottom. The nuts are located outside. Between the parts there is a rubber gasket of at least 2 ÷ 3 mm (pos. 11).

8 - screw with washer that secures the hub to the gearbox output shaft (pos. 9 ). The hub is protected from turning on the shaft by a key (pos. 10 ).

Lower connection block ( B) is being prepared, tried on, but mounted only after the frame is assembled and the drive and gearbox are installed on it. In principle, this will be one of the final operations - on the assembly already mounted to the gearbox B the concrete mixing tank will "sit" on the screws.

All welds must be descaled and inspected carefully to ensure complete impermeability tubs.

Video: homemade concrete mixer with a bucket welded from sheet steel

Concrete mixer frame

In the manufacture of frames or trolleys for concrete mixers, the ingenuity of craftsmen is also quite welcome, who can adapt metal parts and wheels that are unnecessary in the household for this structure.

The frames can be wheeled - that is, it will not be difficult to transport them to the desired place. You can also make a stationary, fixed frame - it is easier to manufacture, and in the conditions of a suburban area, usually any larger movements of the concrete mixer are not planned.

Frames can also differ in the degree of freedom provided by the mixing bucket. So, the container can be hinged, with a change, as necessary, the angle of inclination of its axis to the horizon - for solutions of varying degrees of "gravity", for dumping ready-made concrete, for washing the container, etc.

A simpler option is when the bucket on the frame always occupies one position, and the entire concrete mixer tilts forward to unload the solution - like a wheelbarrow (as shown in one of the figures above) or children's rockers on arched runners.

Video: homemade concrete mixer with swing frame

However, let us continue our consideration of the drawing of the concrete mixer, the manufacture of the mixing bucket of which was described above. It is quite possible to follow this path. The drawing, for ease of perception and for greater clarity in the size and arrangement of parts, is presented in two projections.

Assembling such a frame from regular and shaped pipes and sheet metal scraps will not be at all extremely difficult for an experienced locksmith - welder. Meanwhile, this design is well tested - it is not heavy, but it provides reliable stability of the concrete mixer in the transport and working position, provides maximum ease of use.

1 - this is the same bucket that was described in the last section of the article.

2 - handle-lever for setting the bucket in the desired position and for tipping it over when unloading. You can use ½ ”(½ʺ) steel pipe for the lever.

3 - gusset plate, cut from steel 3 mm (s 3), ensures secure attachment of the lever to the swivel subframe (pos. 18 ).

4 - metal wheels Ø 350 mm. Usually they are taken from decommissioned agricultural equipment.

5 - thrust legs with thrust bearings for stable installation of the concrete mixer in working position. They are made of ½ʺ pipe (the racks themselves) and s3 steel (thrust bearings).

6 - the crossbeam of the concrete mixer frame. A profile pipe with a cross section of 60 × 20 mm is used.

8 - an inclined beam (pipe 60 × 20 mm), and for its rigidity - a brace (pos. 7 ) connected to the crossbeam. For brace - pipe ½ʺ.

9 - the panel to which the control elements of the electric drive will be attached. The panel is cut from steel s3.

11 - wheel axle. It is made of a metal circle Ø16 mm - according to the size of the bore available wheels.

12 - the longitudinal beam of the concrete mixer bed. Profile tube 60 × 20 mm.

13 - vertical stand. Profile tube 60 × 20 mm.

14 - the lug for the articulated swivel subframe. Two parts are made, made of s5 steel.

15 - transfer gearbox. In this version - a ready-assembled unit, worm-type, with a gear ratio i = 17.

16 - safety clutch on the shaft of the electric drive.

17 -. Specifically, in this concrete mixer model, the developer used a three-phase drive (380 V), with a rated power of 1 kW, a rotation speed of 950 rpm.

18 - an oscillating subframe, on which both the electric drive with a gearbox and the mixing bucket itself are mounted. It is made of the following parts: two side members from a pipe ¾ʺ, four cross members - from a 35 × 35 mm corner.

19 , 20 and 21 - electric drive control elements: start button, capacitor box and power cord with a three-phase socket, respectively.

Now - a slightly larger knot A, which ensures the installation and fixation of the mixing bucket in the desired position.

On a stretcher (pos. 18 ) welded eyelet (pos. 22 ), and on a clone stand (pos. 8 ) - sector (pos. 10 ). Both the eyelet and the sector can be made of s3 steel. The selected position is fixed with a pin (pos. 23 ), and so that it does not get lost, it is recommended to hang it on a chain.

The number of fixed positions on a sector can be different. However, usually enough T pex:

- at an angle of 50 ° to the horizon - for mixing heavy concrete mortars;

- at an angle of 30 ° - for the preparation of light mortars (for example, masonry);

- horizontally - for washing the bucket.

After assembling the frame, all welded seams are beaten off from the slag, the parts must be cleaned of corrosion centers. Then it is recommended to cover the structure with high-quality metal paint. Rubbing components of the frame (suspension of the subframe in the lugs of the frame, wheel axles) are abundantly coated with conventional hinged grease.

In the variant under consideration, the drive and the gear unit are attached to the subframe (so that the exact alignment is observed). After checking the performance (test run), you can finally assemble the concrete mixer by setting it in place and fixing the mixing bucket with bolts.

A few words about the drive

In the example under consideration, the electric motor and gearbox already recommended by the developer of the model were used. However, in the practice of independent production of concrete mixers, it is very widespread There is a situation when the master "on the fly" selects a drive from what is available and comes up with a way to transmit torque to the mixing tank.

It is customary to calculate the required power of the electric drive, based on the ratio of 20 W per liter of solution in a scheme with an inclined bucket. (In a horizontal arrangement, for example, in models with a barrel on a horizontal axis, 15 W / L will be sufficient). This ratio should not be forgotten in order not to overload the drive. For example, if the engine in our case has a power of 1 kW, then you should not knead more than 50 liters of solution, regardless of the size of the bucket itself.

Thus, often the bucket itself begins to be made, starting from the parameters of the drive, which is planned to be put on the concrete mixer.

The rotational speed of the mixer bucket should also be within certain framework. So, it is considered optimal from 30 to 50 rpm. Making the speed slower - deliberately delay the process of making the solution. And if the speed is too high, the solution will spray out.

Finding a ready-made gearbox that would meet the requirements for both dimensions and gear ratio is not always possible. Therefore, many craftsmen find their own, sometimes very original ways of transmitting torque while ensuring the required angular velocity. In the variant that was considered, the mixer is mounted directly on the driven shaft of the gearbox. However, often the bucket is mounted on a free axle, and the torque laneeats on it with a gear, belt, chain drive. For example, here are some original solutions:

Homemade reducer - drive from an old washing machine transmits rotation by belt drives through the pulleys of their gears and old bicycle wheels.

Fixed frame for a concrete mixer with a homemade gearbox.

Homemade gearbox, which combines a belt and two chain drives. Again, there were some bicycle parts.

A small-sized concrete mixer, the rotation on the bucket of which is transmitted directly through a belt drive. The pulley is structurally located on the mixing tank itself.

Car parts that are unnecessary in the garage are often used. A popular solution is to use a ring gear flywheel. By the way, it is very easy to find a drive gear for it - from the car starter bendix, since they are "made for each other."

The flywheel can be completely, assembled, welded to the bottom of the bucket.

Another option is when only the girth gear is used. Probably, it is not necessary to say that in this case a very careful centering will be extremely important.

In a word, a thrifty owner can very often find parts for his own original solution to the issue of making the required gearbox. Perhaps the options shown will be a good hint for someone.

Video: another option for the design of a concrete mixer

Prices for concrete mixers Stroymash

concrete mixer Stroymash

If everything worked out, then the owner can be congratulated on the successful acquisition of a good "helper". But in order for the concrete mixer to last longer and not cause any emergencies, you need to adhere to certain rules:

• Like any equipment related to the consumption of electricity, a concrete mixer requires compliance with electrical safety rules. And in this case, this issue is even more acute, since the operation is always carried out in conditions of high humidity and a high probability of splashing water. That is, all cables and contact connections must have the most reliable insulation, completely excluding electric shock or short circuit.
• The operation of a concrete mixer is always associated with high levels of vibration. This leads to a weakening of the threaded connections, which means that they need to be checked and tightened regularly. At the same time, one should not forget to control the safety of other units and parts, welds, etc.
• Before starting work, you need to make sure that the concrete mixer is installed securely. It should rest tightly on all its standard stands. If the structure is mobile, then wheel chocks (wedges) are placed under the wheels.
• Never, under any circumstances not Do not leave the running concrete mixer unattended. Curious, let alone children, should not be allowed to see her.
• When working, it is better to use protective equipment for the skin and eyes, since cement is quite aggressive on tissues and mucous membranes.
• Checking the quality of the resulting mortar with a shovel or a stick while the concrete mixer is in operation is the height of imprudence! Very often, such actions result in serious injury to the hands or face.

And in the end of the article - proof that there are no limits to creativity when creating homemade technology.

Video: homemade concrete mixer based on the old T-16 tractor

Starting a construction site, anyone at least once had a question: how to make a manual concrete mixer with your own hands? It is quite a tedious task to knead in a bucket.

• Combined agitator bucket Is not the best option. In the corners, the solution does not mix properly, and for a better solution, you need to rotate for a very long time, consuming electricity. For small batches of solution, a good bucket is obtained from two identical basins. If the agitator will be used occasionally, you can also take plastic cans, fastened along the rim with a metal tape. One of the cans needs to cut out the bottom. This bucket will only be tiltable: side discharge is not possible. The neck of this top-discharge bucket must be reinforced with two cross bars.
• The drive is used in factory-made mixers, it is expensive and you cannot make it yourself: you need special equipment. For a quality replacement, the following elements will be needed: a flywheel (even an old one from any car engine will do); gear (take it in the same place as the previous version); the wheel hub is from the same car.

1. Wrong selection of the tub. It is necessary to choose a round, high and not very wide: the distance from the edges of the vibrator to its walls should be equal to its radius.
2. Flat vibrator. If you make it from a metal sheet, then this will not excite a certain system of internal waves in the solution. An excellent vibrator will come out of two folded metal plates or saucers.
3. Big vibrator... Typically, the vibrator diameter is 20 cm / kW. A wider one will not be able to mix well.
4. Incorrect vibrator position. In general, the vibrator should be located along the axis of the bucket at a distance equal to its diameter from the bottom. The solution above the vibrator should also be equal to its diameter. When these conditions are met, the quality of the solution will be excellent.
5. Control of the duration of the concrete mix. If the mixture has stopped gurgling and stirring, this means the solution is ready. In this case, 10 minutes minimum will be enough.

Concrete mixer drawings