Specific gravity of a cube of concrete. How much is a kilogram of concrete in a cube? 1 cube of concrete how many kg will be

It is very important to know how much a cubic meter of concrete mix weighs. Even at the stage of developing a construction project, it will be necessary to calculate the loads on the foundation and soil. And monolithic structures are too heavy to be neglected in this matter. On the other hand, if the density of 1 m3 of building material and its basic proportions are known, it will not be difficult to calculate the material costs for the same foundation.

In construction, only three main types of concretes of different densities are widely used. Of these, only light and heavy compositions are produced as liquid mixtures:

1. Particularly light ones are distinguished by the lowest volumetric weight (1 m3 is usually not heavier than 500 kg) and strength, therefore, only wall blocks are made of them. They retain heat well, but they do not tolerate serious stress. This group includes cellular materials with a large number of air pores inside, occupying up to 85% of the total volume.

2. Lightweight concrete is made on such aggregates as expanded clay, perlite, tuff. They reduce to 500-1800 kg / m3.

3. Heavy mixes (1800-2500 kg / m3) - the most common type of very strong and durable materials. They are made by adding gravel or crushed stone to the cement-sand mixture.

What does density depend on?

Aggregate type is the main parameter affecting the mass of the concrete mix. This can be used to prepare formulations with different densities:

• Gravel and ordinary crushed stone will increase the weight of the pour to 2.3-2.4 t / m3.
• Broken brick - up to 1.8-2.0 t / m3.
• Slag is used for the preparation of light mixtures weighing 1.4-1.7 tons.
• Expanded clay will even more noticeably lighten a cubic meter of solution to 1.0-1.4 tons.

If a strong foundation is not required for the construction of a small building, the grade of concrete for its construction is not chosen too high. Then the aggregate of the coarse fraction can be lighter.

Brand identity also affects density. But the point here is not in the properties of the components - they are approximately the same for all solutions, but in their proportions. M350, which has a high density due to its high cement content, will be heavier than M500, the density of which is provided by the coarse aggregate.

Calculation example

How much different concrete weighs, you can navigate according to our table. But when you need to know the exact indicator for a specific case, it is more reliable to calculate it. To do this, use two methods:

1. By weight of components in cubic meter.

As the initial data, we take the grade of cement M400, from which we will prepare the solution, and the required grade of concrete M300. Starting from them, it is already possible to draw up a water-cement ratio (W / C) for 1 cube of a mixture according to the table:

That is, by simply adding water, you can lower the grade and at the same time reduce the density of the solution - after all, cement is 3 times heavier. For our example, the ratio W / C = 0.53.

The next stage is the selection of the proportions of crushed stone and sand, taking into account their size class. To do this, you need to resort to using the table again:

The most widely used is ordinary crushed stone with a particle size of up to 40 mm. This means that sand with a grain size of 2.5-2.7 mm in the aggregate mixture should be about 41%. Water will need 185 liters for each cube of concrete. Then the math is simple:

The amount of cement (with a density of 3.1 kg / m3) will determine the adopted W / C indicator:

• 185: 0.53 = 349 kg.

The volume of aggregates is the M300 cube accepted for calculation, but without water and cement:

• 1000 - 185 - (349: 3.1) = 702 hp.

From here we find the amount of sand and gravel:

• 702 0.41 = 288 l (or 757 kg at a density of 2.63 kg / m3);
• 702 - 288 = 414 l (or 1076 kg at a density of 2.6 kg / m3).

We "collect" our calculated cubic meter of concrete on paper:

• Cement - 349 kg.
• Sand - 757.
• Crushed stone - 1076.
• Water - 185.

So we have determined how much one cube of concrete M300 weighs on crushed stone - 2367 kg. When using sand of a different fraction, the final figure will be slightly different.

2. By volumetric ratio (this calculation is simpler, but its accuracy will be lower).

For the same cubic meter M300, the proportions C: P: U: B will look like this:

• 1: 1,9: 3,7: 0,5.

In just one cube of the solution, there will be 7.1 parts, each with a volume of 140 liters. We multiply the volume fractions given for each component by their volumetric weight - and again we get the sum of four components of a cubic meter of a liquid mixture.

average cost

If you do not have the strength or desire to do the calculations and kneading, you can simply order the delivery of the required brand directly to the site. The cost of a cubic meter of concrete in this case will be determined by its brand identity, but the manufacturer will form prices for his goods precisely by the weight of the components. Still, these characteristics are closely related.

In any cement slurry, the largest volume is occupied by coarse aggregate fractions. That is why the price of a cube can be noticeably different if stronger and more expensive granite was used instead of gravel. Most factories offer their customers a choice of two varieties of any brand: with gravel or granite crushed stone.

Approximate prices per cube without delivery, rubles:

How much cement is needed for 1 cube of concrete for a foundation? How many liters are in one cubic meter? 1m3 = 1000 liters or 1 liter = 0.001m3. How much cement, sand, crushed stone in a cube of concrete? - The concrete mix traditionally consists of three components mixed with water - cement, sand and filler.

And the difference in weight between them varies significantly. Conventional concrete mixed from composite - cement, sand, water and filler (gravel or crushed stone), will vary in weight from 1800 kg to 2500 kg, and it will depend on the volumetric weight of the filler. Filler (gravel or crushed stone) - 1200-1300 kilograms.

More sand and cement will be consumed - if the filler is larger and less - if finer. Different brands of concrete weigh differently. There can be no definite answer here, since there are several types of concrete, the difference is in the brand of cement, filler, additives.

1 m³ = 1000 dm³ = 1,000,000 cm³ = 1,000,000,000 mm³ = 1000 liters ≈ 35.3 cubic feet ≈ 1.31 cubic yards ≈ 6.29 barrels. To heat a cubic meter of water from +1 to +100 degrees Celsius at standard atmospheric pressure, about 100,000,000 calories (100,000 kcal = 100 MKal) or 116.299 kilowatt-hours are required.

In fact, during the year of its activity, LLP removed 15,166 m3 (cubic meters) of solid household waste (garbage). In any case, during the trial (if you intend to appeal against this act), you could demand a calculation formula and legal basis for these calculations.

It is important for me to know if there are GOST standards in force in the Republic of Kazakhstan on these issues. The weight of a cubic meter of solid waste depends on its density. There is such a draft state standard "METHOD FOR DETERMINING THE MORPHOLOGICAL COMPOSITION OF SOLID HOUSEHOLD WASTE". Is it possible to clearly answer this question and why are different units of measurement of the same building material used?

Only an experienced builder can clearly calculate the ratio of the initial components, therefore, if you are not sure about the proportions, it is advisable to contact a specialist for help. If we are talking about crushed stone packed in bags (regular or colored), the unit of measurement will be kilograms.

And vice versa: the weight of a cubic meter of fine gravel or granite screenings will be at least a hundred kilograms more. So, for example, a cubic meter of crushed limestone weighs about 1300 kg, gravel - 1600 kg. However, this knowledge is not enough to start a certain construction.

In addition, liters in our country have not become a generally accepted "production" and trade unit for measuring volume. One cubic meter, or in an abbreviated version - one cube, turned out to be a rather convenient and popular unit of volume for practical use.

How much does a cubic meter of crushed stone weigh?

After all, their cost, prices, rates, consumption rates, tariffs, supply contracts are almost always tied to cubic meters (cubes), much less often to liters. Site visitors, asking how much 1 cube weighs, often indicate specific units of mass in which they would like to know the answer to the question. Density and specific gravity in physics are usually measured not in kg / m3 or in tons / m3, but in grams per cubic centimeter: g / cm3. Garbage density and specific gravity are given in Table 1 as additional information.

The amount of cement in 1 cube of concrete

To begin with, all units of measurement used at the moment in physics, and even in ordinary life, are the result of centuries of experimental decisions. As a result, in order not to be confused in all pounds, miles, inches, it was decided to come to uniform measurement values.

Through simple reflections, we come to the conclusion that 1 liter of water weighs 1 kilogram. It should be noted that in the overwhelming majority of countries these metrics are accepted as basic, sooner or later, but accepted.

Cubic Meter - means a unit of volume of dry Gas equal to one (1) cubic meter at a temperature plus twenty degrees Celsius (20 C) and a pressure of one absolute atmosphere. How many cubic meters of acetylene and water is required to obtain 45 tons of 98% acetaldehyde by the Kucherov reaction.

About 1.2 kilograms of air. This year my wife and I made a decision to move to a permanent place of residence in Vologda. Good afternoon. I have a dacha in my village and I already want to make new plaster there, but before I do it, I would like to read a little about it.

How to fit everything you need in the bathroom? How many bags will it take?) This is a question for the builder. The cement content in one cubic meter, practicality in the consumption of concrete, depends on the correct choice of the binder component of the mortar.

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When calculating cement per cube of concrete, the weight of the dry composition is taken as the basis. The question of how much a kilogram of concrete is in a cube is more relevant when preparing estimates and determining the type of transportation. How much cement is in a cube of concrete - the calculation is very individual and requires the most serious approach. In one cubic meter of this type, the mass is not more than 500 kg. There is a not entirely correct opinion that the greater the specific or volumetric weight of concrete, the higher its strength.

Concrete is a popular building material used in the construction of a wide variety of buildings and structures. Its different types have different characteristics, primarily weight.

How much does concrete M300 weigh

In general, the spread in the mass of concrete is very large - from 500 kg / m3 to 2500 kg / m3. And according to this important indicator, the material is divided into light, medium and heavy types, which have slightly different areas of application.

M300 concrete belongs to the heavy type and weighs on average 2300-2500 kg / m3. It is used for the construction of various structural elements:

• load-bearing and self-supporting walls, partitions, ceilings, building foundations;
• for the subfloor, paths around the house and on the site, entrances to the house from the main road, etc.;
• for hydraulic structures;
• in road construction.

How to determine weight yourself

You can approximately calculate the mass of a cubic meter of concrete M300 knowing the weight of all used components of the concrete mixture. However, it should be understood that 1m3 of the finished mixture will go somewhere 20-30% more by volume of the components. This is due to the fact that during the preparation of the mixture, it is strongly compacted, cement and sand occupy previously empty spaces between the grains of the coarse aggregate. If this is not just concrete, but a reinforced concrete structure, then when calculating the weight, the weight of the steel reinforcement used should also be taken into account.

Also, the weight indicator will not necessarily be constant for a particular brand of mixture. It can vary quite a lot depending on the raw materials used (sand, cement, crushed stone), their density and size. So, for example, the use of a coarse aggregate increases the number and size of pores in a concrete stone, thus making it lighter.

The weight depends on the type, quantity and size of the aggregate (sand and crushed stone) and only shows what kind of load this concrete element creates, transfers to the supporting structures and then to the base soils. He does not give a direct indication of strength. It mainly depends on the grade of cement that was used (it should be 1.5-2 times higher than the desired grade of concrete), and is indicated in the grade of concrete - the numerical coefficient shows the compressive strength in kg / cm2 of a cubic sample (with edges along 15 cm) of this concrete. Those. in the case of the M300 brand, a concrete cube, having gained almost 100% strength on the 28th day of hardening, must withstand 300 kg for each square centimeter of its surface.

Concrete is perhaps the most common building material used in various construction work, from major repairs to the construction of buildings. However, regardless of the type of event, any work begins with planning and calculating the required material, and not only in terms of quantity, but also characteristics. In particular, builders often face the task of calculating how much a cube of concrete weighs, which, in fact, is the subject of this article.

General information

First of all, it should be noted that builders do not use such a concept as “specific gravity of concrete”. This is due to the fact that the material can contain a variety of components that have different weights.

For example, the following can be used as a filler:

• Pebbles;
• Crushed stone or gravel;
• Expanded clay, etc.

And even if the same composition is used for the preparation of solutions, the weight of 1 cube of concrete in different cases may be different. The fact is that the same filler can have different fractions. And the larger the fraction, the correspondingly more voids and less mass.

At the same time, builders are always interested in how much one cube of concrete weighs, since the specificity of the application of the material depends on this indicator. In particular, based on weight, structural calculations are performed, for example, the type of foundation for different types of soil is determined. The same goes for the rest of the load-bearing elements.

In practice, builders operate with such a parameter as "volumetric weight", however, it should be understood that this characteristic is not a constant. In addition, the calculation takes into account the volume of liquid used to prepare the solution.

Types of compositions

As mentioned above, concretes can have a different composition, as a result of which their mass changes.

Depending on this, several types of them are distinguished:

• Especially heavy and heavy;
• Especially lightweight and lightweight.

Now let's take a closer look at the features of each type.

Heavy

Hard rocks are used as a filler for this material:

• Gravel;
• Crushed stone.

Such solutions are used to make carriers. In their manufacture, I use a certain proportion, however, it is not unchanged.

Therefore, it is impossible to give an exact figure for how much a cubic meter of concrete weighs. As a rule, its mass ranges from 1,800 to 2,500 kg / m3

As for especially heavy compositions, they are used quite rarely, as a rule, in the construction of special industrial facilities. In housing construction, such material is not used.

How much 1 cube of concrete weighs, in this case, determines the mass of barite or hematite, which is used as a filler. In addition, the composition of the material may include cast iron "shot" and iron ore. It must be said that the technology of its production requires the use of high-grade cements.

The volumetric weight of this material is 2,500 - 3,000 kg per cubic meter. Accordingly, the price of such formulations is the highest.

Lightweight and ultra-lightweight concrete

This material differs from the above-described more porous structure. As a result, the weight of a cube of concrete of this class is 500 - 1800 kg.

In this case, lightweight materials are used as fillers, such as:

• Expanded clay and others.

Lightweight materials are used, as a rule, in the construction of partitions and walls of light structures.

The weight of 1 meter of ultra-light class concrete is even less - up to 500 kg. Low weight is achieved through the use of fillers such as perlite and vermiculite, as well as some other substances.

Since the strength of the material is very low, it is used in construction as heat insulators, for example, when sealing seams and joints.

In the photo - the structure of foam concrete

Separately, it should be said about such types of material as foam concrete and aerated concrete. Their small mass is due not to fillers, but to their cellular structure. The pores in such materials are formed as a result of the release of gases, during a chemical reaction in a solution, or in the process of mixing a solution with foam.

Their main advantage is a low level of thermal conductivity, as well as a high vapor permeability coefficient.

Note!
Some brands of aerated concrete can be used in the construction of load-bearing structures with limited loads.

Determination of weight

To find out how much 1 cubic meter of concrete weighs, you can look at SNiP No. II-3. This standard specifies the weight of various types of formulations, depending on the type of filler. In the table, we present the data of some of them:

Of course, the weight of a cubic meter of concrete in this case is approximate, but these data can be quite guided by to determine the mass of material in the "fill". I must say that accurate data, up to the calculation of several kilograms, does not imply any calculation.

It should also be noted that developers often determine the weight of 1 cubic meter of concrete, taking into account the grade of the material. The table shows the data:

Note!
In practice, data on the mass of concrete may be needed not only during the construction or repair of any structures, but also during the demolition and dismantling of structures.
For example, to determine the carrying capacity of vehicles for garbage disposal.

It's important to know

Before proceeding with the calculation of the weight of the structure, we recommend that you familiarize yourself with the following information:

• Many novice builders make the mistake of trying to get the mass of concrete by counting the specific gravity of all the components and adding them up. The data obtained are far from real, since this indicator may even depend on the quality of the batch. For example, the solution can be made by hand or in a concrete mixer.
• Many builders believe that the specific gravity of a material is an indicator of its strength and reliability.... However, this opinion is erroneous, since the strength is determined by the brand of cement. This is evidenced by the above table.
• The mass of the solution and the hardened structure is significantly different, since in the process of hardening, water evaporates.

Note!
The strength and reliability of concrete is even influenced by the extent to which the instructions for its preparation are followed.
The solution must be poured in a certain order, and must be thoroughly mixed, until a homogeneous mass with a filler evenly distributed in it.
Excessive amount of water in the composition can damage the material.

Here, perhaps, are all the main points, knowing which, you can calculate the weight of the structure.

Output

The weight of concrete depends on a number of factors, so it is impossible to calculate the exact value. However, focusing on the type of filler, you can get an approximate value, which is quite enough to calculate the weight of a concrete structure.

You can get more information on this topic from the video in this article.

The range of application of the cement mortar is very wide: from the decoration of the walls of a residential building to the construction of massive dams. Knowledge of the weight of concrete structures and reinforced concrete products is of great importance in the design of various objects. To do this, you need to know how much one cube of concrete weighs, and what affects this value.

When the question arises about the weight of a cubic meter of concrete mix, it should be understood that we are talking about density. It is one of the main technical parameters of the cement slurry. The unit of measurement is kg / cm3. The higher the density, the greater the weight of the concrete. Both of these values ​​directly depend on the type of filler. It is on it that the classification of solutions is made. We recommend that you study what characteristics it affects.

How much does different concrete weigh?

It is customary to display technical characteristics by dividing them into classes and brands. When solving specific problems, this helps to correctly and accurately select the concrete mix.

1. Classes of concrete.

• Heavy.

This is the most common (classic) type of mortar. It is best suited for the construction of main structural members, screed casting, fencing, etc. The composition of heavy concrete includes large and massive fillers: coarse sand, gravel, crushed stone. It is they who occupy the bulk of the mixture. A cubic meter of such material weighs 1800-2500 kg.

• Lungs.

The name of the group of concretes is determined by the structural features of the fillers. In the manufacture, expanded clay, vermiculite, perlite, various industrial waste are used. The porous structure of these materials reduces the weight of the cube of the finished solution to 500-1800 kg.

Not all lightweight concrete contains sand. Where it is prescribed by the recipe, its mass in 1 m3 is 600 kg. Lightweight concrete is used in the construction of building blocks, enclosing structures or screed filling.

• Extra heavy (super heavy).

In production, metal fillers are used, which impart massiveness to the finished product. The weight of a cube of concrete is 2500-3000 kg. In the composition of super-heavy mixtures, cement of increased strength is necessarily present. They are not used in private housing construction. Usually, they are used to make special-purpose protective structures, for example, for nuclear reactors.

• Extra lightweight (heat insulating)

This group includes cellular concretes, in which there are no large fillers. In addition to cement and sand, they contain foaming agents. During the production process, voids are formed inside, occupying up to 85% of the total volume. Therefore, the mass of the cube is very low - less than 500 kg. To increase the strength, special plasticizers are added to the cellular solutions.

Especially lightweight types of concrete are used in the production of blocks and slabs with high thermal insulation properties. Their disadvantage is weak frost resistance. Therefore, building elements with a porous structure require mandatory waterproofing.

2. Grades of concrete.

In the group of heavy solutions, there is an internal classification. It is determined by a different ratio of components in the formulations. Depending on this, the mass of a cubic meter of each brand is slightly different.

Ratio table:

A decrease in the volume of the filler leads to a decrease in the mass of the cube and an increase in the strength of concrete. Replacing one brand of cement for another affects the strength value. To prevent this, you need to make changes to the layout of the components. At the plant, such problems are solved in laboratories. At home, you have to adjust the ratio "by eye", which can negatively affect the quality of concrete. Therefore, in the manufacture of cement mortars with their own hands, construction experts recommend taking the classic formulations of the components as a basis.

Weight table for different grades of concrete:

Based on the given data, you can easily determine the average weight of one cubic meter. Experimental studies confirm theoretical calculations and show that 1 m3 of concrete solution weighs 2400 kg.

Average cost of a cube of concrete

When the process of pouring large structures takes place continuously, it is advisable to order and bring ready-made concrete from the factory. Of course, it will cost more than manual kneading. After all, the customer has to pay for all production work, delivery, loading and unloading of the machine.

The final price of a cube of ready-mixed concrete is variable and depends on many factors:

• Brand - determined by the technical requirements for each type of construction.
• Filler - a cubic meter of gravel-based mortar costs 100-150 rubles cheaper than granite concrete.
• Remoteness of the working site - delivery in a big city or off-road conditions is more expensive.
• Boom length - a concrete pump is not required in all cases.
• Days of the week - on weekends and holidays, the cost of a cubic meter of concrete mix is ​​usually higher.
• Order volume - more favorable terms of sale are offered for wholesale customers.

Ready-mix concrete price table:

When only a few cubes of solution are required, you can prepare it yourself on the job site. It is advantageous to use manual kneading when pouring small elements: stair steps, garden paths, architectural details of small shapes. The price of such concrete is quite affordable for any developer.