Which concrete to choose. Brand and class of concrete. What mistakes during mixing will make concrete weak? Technology for preparing composite compositions

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Siberian Marina Selivanova chose design as her profession - after two specialized higher educations she worked in interiors, advertising, event design, food design, etc. But one day the idea came to her about making jewelry, and not from traditional materials, but from... concrete. Marina Selivanova told the portal site about how much demand there is for accessories made from building materials and what are the nuances of their production.

29 years old, entrepreneur from Novosibirsk, founder of a brand of concrete jewelry. Graduated from Yenisei teacher training college(specialty “teacher of fine arts and drawing”) and Novosibirsk State University architecture, design and art (specialty “designer”). The accessories brand was launched in 2016. Single.

Combine the incongruous

When I figured out my higher education, then worked for six months in the field of interior design and graphic design. Now I still continue to receive such orders: I make business cards, banners. I also do food design and design events.

I didn’t have a goal to start making jewelry - just one day, as part of my design work (as well as the renovation of my apartment), I somehow took a new look at concrete. I liked its texture - uneven, interesting; In my apartment, I even left one wall concrete, without finishing. I decided that concrete could make something truly stylish and beautiful.

When it comes to concrete, many people immediately think of something massive and heavy. I wanted to make something light, small and unusual from this material. This is how I came to jewelry. In general, I really like this concept: comparing the incomparable, combining the incompatible. Concrete with gold is interesting. With minerals semiprecious stones and many masters work this way, but it’s great to find something of your own, your own style. A person carries himself in his work.

In my jewelry, I combine concrete with acrylic, copper, gold and silver leaf; I also use pigments in the concrete itself (in particular, black).

My brand Haf Maer has no translation. I had no intention of tying the name to anything. So I came up with this - simple and sonorous, a little reminiscent of Scandinavian motifs and Vikings. Besides, I didn’t come across such a name in hashtags on Instagram.

Sand in the art salon, cement in the construction store

Acquaintance with working tools occurred gradually. The first thing I purchased was sanding paper, needle files, files, then grinder(which I don’t use now because it’s big and it’s inconvenient for sanding small parts).

At first I worked without protective equipment, but later I realized: this is not worth saving on. I bought additional gloves, a respirator and special glasses. My dad gave me the drill. That is, I only needed 10 thousand rubles to start.

To begin with, I just started trying to work with a material that was new to me and poured concrete into some kind of cream lid. As planned, it was supposed to be a pendant. It turned out to be very large - 10 cm wide. I drilled a hole in it and that’s how I got my first pendant. Now, however, I don’t know where she is. But I would like to find and compare with current products: progress, I think, would be obvious.

It took me a lot of time to understand what components were needed for my author’s composition of the material. The fact is that I developed the technology for my concrete myself; it is not similar to construction concrete. I needed the material to become denser and harder. The concrete used for construction would crumble in my jewelry—especially the miniature pieces. It also absorbs moisture.

After six months of experimentation, I managed to develop a suitable recipe for my concrete. I won’t reveal the entire composition, but there is sand and cement (these are, in general, the main components of concrete).

I take pigmented, black sand, buy it in art salons and hand-made stores. I buy regular cement, in a 15 kg bag, in hardware store. This amount is enough for a year. It’s unlikely that the sellers think that I need this bag for dozens of earrings and pendants, and not for repairs.

As a result, my jewelry, of course, can last a long time, thanks to the special composition of concrete. Unless you try really hard, it's hard to break them.

In the fight against allergies

In addition to concrete, production also requires forms for it - to make different elements of decoration and connect them. I either buy the forms or make them myself if I don’t find suitable ones on sale. They are filled with a composition that hardens within 24 hours. Thus, a simple decoration consisting only of concrete takes 24 hours to make. Complex decoration requires two days.

After hardening, the product must be processed engravers, grinding machines, drills and drill bits.This is a very dusty job, I do it on a separate table - so that concrete particles from grinding do not fall on those decorations that are currently in the process of drying.

We still need fittings. Today I have it not made of precious metals, it is a jewelry alloy. But now I'm switching to surgical steel, which does not cause allergies. In the process of working as part of the Haf Maer project, I was faced with the fact that many of us cannot wear costume jewelry due to allergies. In general, there are accessories in Russia big problems– you can’t really let your imagination run wild if you want some interesting additions to the concrete (and I would like this in many models).

Usually accessories for jewelry self made They order from China, but the quality there leaves much to be desired. Good suppliers in Korea and the USA. My new supplier for surgical steel is from Russia. It also cannot offer a wide selection of shapes of clasps, chains, etc. – but in this case, for me, of course, hypoallergenicity is a priority.

Looking for clients

I started in my apartment, but for the last month I have been working in a workshop. We are filming it together with a friend who sews bags. Between us we have 30 square meters, and since there are no other employees besides ourselves, this is enough for now. We also have one individual entrepreneur for two. Today, working with Haf Maer takes up 50% of my time.

For sales, the first thing I did, of course, was create Instagram page. At first I just gave my jewelry as a gift. Including, when I worked as a designer at some events, I made presents for guests from it. Then I gave a few pieces by barter to small bloggers: that is, I give them jewelry, and as a return courtesy, they write about my brand in their profiles. So big money I haven’t invested in my promotion yet. I also participated in markets in Novosibirsk, where I presented my products and gradually met new clients.

And then, towards the end of 2018, girls themselves began to contact me. Now in the city I am already better known as a jewelry designer than as a designer of anything else. My target audience is women 20-40 years old; they are united only by some kind of affiliation or commitment to creativity and style. By the way, such a range in age surprised me: I was more likely counting on young people.

The most interesting and at the same time difficult order for me were earrings for my mother for her anniversary. She doesn’t have pierced ears, so I made special clips (so now we have this option in our line). As a result, the earrings suit her very well, and I was once again convinced of how jewelry can transform a woman.

I’m also especially interested when, for example, a girl wants asymmetrical earrings. And together we look for shapes that will go well together and put together a set.

Often people don’t even pay attention to the fact that my jewelry contains concrete. For them it is paramount general form decorations. It’s funny that the last time a girl who works in a hardware store ordered a ring from me, I was very intrigued by its composition.

A year ago I was selling a couple of pieces of jewelry a month. Today I sell 15-20 per month. And on the market I can sell 15-20 pieces in one day. The cost of my jewelry is 1-2 thousand rubles. I am sure that sales will grow and this business will bring me significant income.

Today my jewelry is sold in Moscow (in a showroom with clothes and accessories), Yaroslavl (in a beauty salon) and Irkutsk (in the Bonstein Gallery). They found me themselves, which is interesting, and offered to collaborate. But mostly my sales are on the Internet and in two Novosibirsk points (a showroom and an art space).

Basically I work to order using models that I have already developed. I usually don’t take completely custom orders. The difficulty is that then in each case you will have to make a separate mold (and people are usually not willing to wait an extra week). Plus it’s irrational - then you don’t know what to do with all these forms.

At some point I began to wonder if someone somewhere was creating similar jewelry. I found those who make decorative items from concrete (pots, stands, etc.) - including those who also make jewelry. But they work with regular gray concrete, and the style is completely different. I wouldn’t want to scale my project this way in the future. Rather, I will come up with some other unusual material.

My competitors are other masters who work with the most different materials. For example, in Krasnoyarsk a girl pours jewelry out of epoxy resin, they are also made of wood, etc. I began to notice that sometimes they even take jewelry models from me and repeat them. I haven’t thought about a patent yet, but it’s probably worth doing one.

In the future, I would like to open something like a showroom-workshop. I would also like to switch to jewelry metal (silver).

I’m unlikely to ever have million-dollar sales, since concrete is a specific material. However, the potential is there. So I plan to invest in advertising. There is an intention to expand the number of its representatives in other cities.

I like to create new things and the fact that you can put an “equal” sign between my business and me: concept, idea, brand philosophy H af Ma er is me. And there are people who understand and appreciate this. This is why I continue.

Behind long years in construction practice, people have never found a more durable, practical, durable material than concrete. It consists of a mixture of cement, sand, water, and crushed stone.

Also, modern builders add special strengthening additives to the solution, which make the material almost eternal, indestructible, and as durable as possible. However, when making a concrete mixture, the proportions of all components must be strictly observed. Otherwise, foundation, reinforced concrete wall multi-storey building, ground floor, located underground will not be durable. The material will crack, will go out of service ahead of time, and dangerous situations will be created. So what mistakes in concrete production negatively affect the quality of finished products?

The most important mistakes

It should be noted right away that concrete mixtures can be prepared in different ways. Everything will depend on what building construction need to be made from the resulting mixture. The most main mistake- this is the incorrect use of cement dosage. Excess or underestimation of this component completely affects the finished structure. You also need to clearly consider what brand of cement to use before placing it in the future solution.

Note! For construction iron concrete structures that will be used underwater, the strongest, most expensive brand of cement is used. For simple structures used under open air It is permissible to add a low grade of inexpensive cement to the solution.

Another very important mistake is the lack of high-quality mixing of the solution when producing large batches of cement.

• Good mixing is one of the most important components in the production of concrete on an industrial scale;
• Under no circumstances should you use dirty fillers, unsifted sand, or interspersed with pieces of clay. All this leads to a poorly manufactured solution, which will be very poor in finished products;
• Also, don't use dirty water. The liquid must be cleaned before mixing occurs. The water is purified from mud, pieces of clay, and all kinds of biological pollutants;
• Under no circumstances should cement powder be used after long-term storage.

And you need to be very careful to ensure that there is no overdose of various types of strengthening additives that are added to iron concrete mortar.

Leading position among building materials It has been holding concrete for many years in a row. It owes its popularity to its unique performance qualities, incl. high strength, frost resistance and moisture resistance. Moreover, varying the ratio of the constituent components of concrete makes it possible to obtain a material with slightly different properties, which makes it possible to use it in almost any conditions. The question of choosing suitable concrete remains the most important and difficult, because the further properties of the structure depend on this.

It is equally difficult to choose a suitable concrete manufacturer. The growing demand for this building material has led to the emergence of a huge number of proposals, which are quite difficult to navigate. To ensure that a potential buyer of concrete can quickly find the best offer for themselves, the M350 concrete tender system was developed. It is presented on the page http://m350.ru/price/m350/ and allows the user to quickly familiarize themselves with all offers for the sale of M350 concrete and other brands in the Moscow region and choose the most suitable one for themselves, based on price, plant location or operating mode manufacturer. The system allows save time and money.

To be able to choose the right concrete mixture for specific purposes, you need to know what indicators to pay attention to. Among the most important brand and concrete class, moisture and frost resistance characteristics, as well as concrete mobility.

Concrete grade

The most important characteristic of concrete is its ability to withstand compressive loads. This parameter is denoted by the letter M, and the index behind it indicates what load each square centimeter of concrete can withstand. The exact value is determined in laboratory conditions by testing concrete that has hardened for 28 days, and the rounded value is recorded in the marking. For example, concrete that can withstand 98 kgf/m2 is designated as M100, and concrete that can withstand 196 kgf/cm2 is M200. Simply put, digital index speaks of the number of kilograms that can press on 1 cm2 of concrete without destroying it.

Today concrete is produced from M50 to M1000, But Concrete grades M100-M500 are consistently in greatest demand. The different levels of concrete strength are explained by differences in composition: the proportions of the components used and their quality affect. Concrete contains sand, cement, crushed stone or gravel. Sand together with crushed stone (the so-called skeleton) are responsible for bearing capacity future structure, and cement, combining with water, is responsible for the strength of molecular bonds. The higher the proportion of cement in the concrete composition, the higher the strength of the concrete itself.

The quality of the components also plays a role. Sand can be either river or quarry sand– it is important that it be large and with a minimum amount of clay impurities. Optimal size crushed stone - 20-25 mm, it must be made of strong rocks. The grade of cement also affects the strength of concrete. As a rule, M400 and M500 cement is used; less of the latter will be needed to prepare concrete of a given strength.

The least durable grades of concrete are used in the construction of the lightest and least critical structures. Foundations of private and multi-storey buildings, industrial buildings created using more durable compounds (M200 and higher). As strength increases, the price of the composition also increases, so there is no point in using overly strong compositions, nor is there any need to save money.

Concrete class

The class of concrete also indicates the strength of the material, this modern derivative of concrete brand. If, when determining the grade, the average value of the strength of the material is used, then the strength class involves determining the strength with guaranteed security. It's more exact value, which is expressed taking into account the coefficient of variation of 13%. Despite the fact that the class more accurately defines the characteristics of concrete, today most experts use the concept of grade.

Classes define letterBand numbers from 3.5 to 60: the higher it is, the more durable the composition in front of you. There is a direct connection between classes and brands: for example, the M100 brand corresponds to class B7.5, the M200 brand to B15, etc.

The relationship between the class and grades of concrete in terms of strength

Waterproofness of concrete

The waterproofness of concrete refers to its ability not to allow water to pass through. Previously, this characteristic was denoted by the Russian letter B, now useW, and the numerical designation next to it may begin from 2 to 20, equal to the pressure of the water column in kgf/cm2, at which a cylindrical concrete sample standard height does not allow water to pass through.

If a foundation is being built from concrete in conditions elevated groundwater level, then it makes sense to choose a composition with a high water resistance value, to which special hydrophobic additives are added. By the way, the use of such material will reduce the cost of complete waterproofing of the foundation.

Has the highest levels of waterproofness and water resistance hydraulic concrete. For its production, hydrophobic or plasticized Portland cement, sand and crushed stone of higher quality are used than for conventional concrete. High levels of water resistance are also achieved through installation with maximum compaction.

Frost resistance of concrete

The frost resistance of concrete is indicated by the letter Fwith a numerical value from 25 to 1000: the higher it is, the greater the number of freezing and thawing cycles concrete can withstand without losing its strength properties. The choice will depend on the conditions in which the finished structure will be operated, on the climate, the number of periods of freezing and thawing during the cold period of the year.

For the construction of hydraulic structures, airfield pavements and bridge supports, it is better to choose the most frost-resistant compounds. In private construction for construction foundation will do concrete class F100 or F200. You can also focus on density: the higher its value, the more frost-resistant the composition will be.

Mobility of concrete

The mobility of concrete (P) indicates degree of its fluidity, which directly affects the ease of working with the composition. The numerical coefficient is expressed in the range from 1 to 5: the higher it is, the more liquid the composition will be. In private construction, concrete is used for foundation construction. P2 and P3. More fluid compounds are used only in cases where it is necessary to pour a densely reinforced base, or when concrete is supplied using concrete pumps.

It is, of course, more convenient to work with a more fluid composition, but water cannot be added to ready-made concrete to increase the mobility of the composition. In this case, the grade of the solution is immediately reduced, reducing the final strength.

Areas of use different brands concrete

Concrete has become widespread and is used to create foundations and many other structures. Depending on the purpose of use, concrete of one or another brand is selected. Here are the main areas of use of the most common grades of concrete:

Choosing concrete for the foundation

Since concrete is used in the organization of the vast majority of foundations, the question of its choice specifically for these purposes requires more detailed consideration. To select the required brand, you need to know the weight that will be placed on the structure, its operating conditions, take into account the type of soil, groundwater level, etc. All this should be mentioned in project documentation, and for those who carry out construction on their own, we will provide information on the scope of use of different grades of concrete.

The less the load from the building being erected, the less durable concrete will be needed. If it is built frame house, then you can get by with M200 concrete, For wooden house It is better to make the foundation from M250 concrete. For two-story wooden houses, houses It is better to choose M300 concrete from gas silicate and expanded clay concrete blocks. If reinforced concrete will be used Wall panels or plans to build brick house, then concrete M350, M400 and higher is used for the foundation.

Affects the choice of concrete grade and soil type. The more heaving the soil, the greater the differences in load on the foundation. Yes, for clay soils It is better not to use concrete below M350, and for sandy and rocky soils M200 is also suitable. If the groundwater level in the place where the house is built is high, then it is better to choose concrete with increased water resistance: even if M250 is suitable for loads, it is better to use M350, for which W is almost twice as high.

Whatever brand of concrete is used, the characteristics finished design The correct dilution of the mixture with water, as well as the process of filling the mold with concrete and the uniformity of concrete distribution also largely influence.

Concrete is a material that is in great demand in modern construction. It is used in the construction of foundations, walls, paths, bridges, etc. In this case, a different composition must be used in each specific case. The specific purpose of concrete is determined by its class or brand. The latter are usually indicated on the packaging.

Types of concrete

Currently, the following grades of this material can be used in the construction of buildings and structures:

super light;

• very heavy.

The concrete mixture is made using different types of fillers. The brand of the finished solution is determined by the type of the latter. Both light materials (for example, expanded clay or sawdust) and heavier ones (sand, crushed stone) can be used as filler. In industrial construction, special specialized concretes. They use metal shavings as filler. This solution is considered very heavy.

Concrete grade

This indicator is determined experimentally in specialized laboratories. In order to find out what brand of concrete is, a cube made from it with a side length of 15 cm is subjected to a certain pressure. At the same time, they look at compressibility indicators.

On currently There are the most commonly used major grades of concrete on the market. Both their characteristics (the table below presents them clearly) and methods of application will be discussed by us a little later. There are seven such types of material in total. Each of them is designated by the letter M and a number indicating what pressure in kgf per cm² the material can withstand. So, for example, M200 concrete is capable of maintaining integrity under a load of 200 kgf/cm².

Concrete class

The strength grade of concrete is directly related to the class of this material. However, the latter is a more precise and specific meaning. After all, the quality of the finished concrete, in addition to the filler and the brand of cement, can be influenced by many other factors. For example, the type and purity of filler, sealer and binder, as well as pouring methods, hardening conditions, etc.

When determining the class of concrete, its grade, as well as correction factors, are taken into account. It is calculated according to the formula:

B = R*(0.0980655*(1 - 1.64*V)),

where R is the average strength of the material (grade),

V is the coefficient of variation.

We found out that there is such a thing as concrete grades. Both their characteristics (the correspondence table will clearly show this) and the scope of use in most cases coincide with the classes. However, the latter indicator is indicated not in kgf/cm², but in pascals. The parameter 0.0980655 in the above formula is precisely the transition coefficient from one unit of measurement to another.

So, certain brand concrete strength usually corresponds to its specific class. However, sometimes the average and actual strength of this material differ quite significantly. In this case, the brand and class may not match. For example, concrete grade M200, due to the not very high quality of the filler or cement, may be designated as B10, not B15. The number in the class of a material shows its ability to withstand certain loads in MPa. Thus, B25 concrete can withstand pressure of 25 MPa without harm.

Of course, its cost also depends on the class of material. The solution is usually sold by volume. That is, the unit of measurement for which the price of such material is determined is a cubic meter. So, 1 m³ of a solution of class M100 costs about 2000 rubles, M200 will cost about 2200 rubles, and M300 can be bought for 3500 rubles.

Compliance with brand and class

When conducting various kinds construction work Often you need to know what properties a particular type of solution differs from. Next, let's look at the qualities of specific brands of concrete. Both their characteristics (the table presented below will certainly be useful to many builders) and the scope of application, as already mentioned, in most cases correspond to the properties of a certain class.

Concrete M100

Thus, we have reviewed in general terms what concrete grades are and their characteristics. The table shows that the scope of application of this material depends mainly on its strength. Next, let's take a closer look at how each class is specifically used. The M100 brand material, for example, is not very strong. Therefore, it is usually used for plastering walls, carrying out preparatory work when pouring a road surface or constructing a foundation. In the latter case, the so-called footing is made from this material - a flat platform on which the reinforcement frame is installed.

Often this concrete is also used when installing curbstones that are not subject to special loads, pouring sidewalk paths off-road, etc.

The scope of application is approximately the same. The material is quite durable for the construction of structures that are not subject to loads, but not reliable enough for pouring “serious” objects.

Brand M200

Concrete floors and screeds are usually made from class B15 concrete. This brand is also good for filling small stairs, paths, platforms, etc. Sometimes owners suburban areas Even foundations for houses with walls made of lightweight materials are built using such a solution. However, the M200 grade of concrete can be used for this purpose only on stable soils. Wherein groundwater must lie deep enough.

Concrete M300

A solution of this composition is an excellent answer to the question of what brand of concrete is best suited for the foundation. Also, stairs and fences are often cast from this class of material. This option is also good for construction. monolithic walls low-rise residential and commercial buildings. Brand M300 today is the most popular type of concrete among owners of suburban areas.

M350

Pouring foundations and monolithic walls is what this brand of concrete (and class of concrete) is mainly used for. The table shows that material of such strength is also used for the manufacture of reinforced concrete products. These can be beams, floor slabs, etc. In addition, M300 concrete is often used for pouring screeds and floors. Sometimes homemade ones are made from it monolithic floors in formwork.

Concrete M400

This is a very durable type of material, used mainly in the construction of buildings and structures for special purposes. For example, pillars and decks of bridges are cast from it, bank safes and hydroelectric dams are made. The same concrete is also used to fill airfield runways.

Other indicators

So, the most important parameters are the grade of concrete and the class of concrete. The table of their correspondences shows how durable one or another variety can be. Of course, the ability to withstand certain loads is the first thing you need to pay attention to when choosing concrete. However, there are other parameters that are no less important and determine the suitability of the material in a particular case. Therefore, there are grades of concrete not only in strength, but also in such indicators as frost resistance, moisture resistance and ductility.

The ability of concrete to withstand low temperatures

In conditions of middle and northern latitudes, the durability and reliability of finished concrete structures largely depends on such indicators as frost resistance. Previously, the brand of solutions in this regard was designated as MP3. Nowadays, concrete is classified by the letter F in terms of frost resistance. The number following it characterizes maximum amount cycles of freezing and thawing that the material can withstand without loss of quality.

Like strength, a particular composition is determined experimentally. Samples are examined serially. In this case, the strength of concrete is preliminarily measured. Next, it undergoes several freeze/thaw cycles. At the final stage, its strength is again determined.

Currently, concrete of frost resistance grades from F25 to F1000 is produced. In private housing construction, the greatest resistance to low temperatures must, of course, have concrete for exterior use.

However, you should pay attention to this indicator not only when constructing houses in regions with a cold climate, but also when constructing such important structures as bridges, dams, airfield pavements, and roads.

Moisture resistance grades

This indicator is important to consider when choosing concrete intended for the construction of buildings and structures operated in conditions high humidity. Water resistance is the ability of a material not to allow moisture to pass under pressure. In this regard, there are different types concrete. There are only five main brands of water resistance: W2, W4, W6, W8, W12. Previously, the letter B was used to determine the quality of concrete by this indicator.

The number after W in the marking shows at what pressure in the water column the prototype does not allow water to pass through. Testing of concrete for moisture resistance is carried out using the “wet spot” method. In practice, two indicators of water resistance are usually used:

Modern industry produces not only ordinary, but also special, hydraulic concrete. This material is highly resistant to water. In its production, high-grade Portland cement or its plasticized version is used. The quality of fillers is subject to special requirements. They should not contain any organic residues. The maximum permissible grain size used for manufacturing should be 5 mm.

Grades by plasticity

This parameter primarily affects the workability of B certain cases this indicator can be very important. For example, for pumping through pipelines or when pouring structures using machinery, sufficiently flowable concrete must be used.

The plasticity of a solution, as is known, increases with the addition of water. However, if there is too much of it, the concrete will lose strength. Therefore, to increase the mobility of the solution in our time, special additives are used - plasticizers.

This material is marked by fluidity with the letter P. In this regard, there are the following types of concrete:

PK1 - the immersion depth of the cone is 1-4 mm.

PC2 - 4-8 mm.

PK3 - 8-12 mm.

PK4 - 12-14 mm.

Plasticity is determined as follows:

A cone is made from tin with a wide side diameter of 200 mm and an apex angle of 30 degrees.

Fill it in three steps concrete mixture with a tamper.

Level the concrete and turn the cone over onto a flat surface.

• They look at how much the concrete shrinks over a certain period of time.

So, when buying a ready-made solution, first of all you should look at its strength class. If necessary, you should also make sure that the grades of its moisture resistance, frost resistance and mobility meet certain conditions. In this case, the finished structure will be reliable and durable.

Concrete mixtures belong to the category of the most used materials in construction. This entails permanent job to improve the composite composition and the quality of its components. Several years ago, the category of especially durable artificial stones included materials of class B30, but today this situation has changed in the most dramatic way.

Modern high-strength concrete in its characteristics and technological properties differs significantly from classical mixtures for the production of concrete stone. Its parameters differ not only in strength, but also in a number of other characteristics. However, today there are several various types high strength composite materials used in .

Also in Soviet time the standard range of building materials provided for the possibility of manufacturing high-strength concrete relevant classes from B40 to B60. They were used in the construction of especially critical structures and elements of bridges, dams, railway sleepers and others. However, the distinctive characteristic of these compositions was their high rigidity and low ability for high-quality installation.

Modern composite mixtures of increased strength not only are they highly resistant to mechanical and weight loads, but also an excellent level of manufacturability when laying in monolithic structure. Very good mobility and ability of materials to self-compact makes it possible to avoid using vibration equipment and reduce the required number of workers on the construction site.

The ability of heavy-duty concrete to self-compact during placement

When obtaining new types of concrete, manufacturers of building materials receive a unique structure artificial stone thanks to the use of continuous granulometry technology for all components.

Precisely selected fractions of fillers no larger than 20 mm in size and specially processed to obtain a special shape make it possible to obtain a special active structure of the material, capable of flowing and compacting under its own weight. Due to these properties, such mixtures received the general name of self-compacting concrete (SCC).

The combination of high-quality thin floor Portland cements, active mineral additives and fine processed fillers ensures that the installation system remains as stable and easy to use as possible. However, it should be noted that the selection and sorting of the constituent components is quite complex in technological terms. Therefore, such balanced systems are quite expensive and are used only after an appropriate economic justification.

Technology for preparing composite compositions

It is used for the construction of bridge spans long length, reducing the number of load-bearing supports and speeding up the project completion time. The use of new composite materials is usually aimed at solving complex engineering problems and is rarely found in traditional ways construction.

Video review of the material