What is there concrete classification ?

concrete classification occurs in the class, the strength of the material, as well as the brand and destination that allows to facilitate consumer choice.

Concrete solution belongs to the category of building materials used for the construction of the base substrate.

With its use of constructing various supporting structures, including foundations and floor slabs.

Moreover, for each individual object, can use different kinds of concrete compositions that include various additives.

Due to what their classification is carried out in terms of strength, the degree of resistance to moisture and frost.

Types and technology

producing concrete compositions Consider what is there classes and grade of concrete and where they find their application:

• cement concrete - often used on construction sites, solution is made cement-based, most often, it isPortland cement.Also, for the manufacture of cement concrete can be used slag-portland cement and portland pozzolan.Not excluded decorative cement additives: strain and unshrinkable binder;
• special concrete mixture - its production takes place on the basis of a special binder.Chemically resistant and fire-resistant properties of concrete is obtained by adding to a mixture of liquid glass.As a binder used slag, nepheline stekloschelochnye and additives;
• silicate concrete - is rarely used on construction sites, it is made by adding lime binder.Solidification and purchasing strength is due to the use of autoclave technology.Technical properties of silicate solution depends on the quantity and fineness of silica sand used in the production;
• shlakoshchelochnyh - made on the basis of the crushed slags, by mixing concrete with alkali solutions.In the construction of this type of concrete used recently started;
• polymer - is used for the production of polymer a certain ratio of special resins, cement and latex;
• Gypsum - made on the basis of a binder - gypsum.Thermal insulation properties of these compositions make it possible to use them for internal finishing works, particularly in the construction of interior partitions;
• Cellular lightweight materials - is classified as a type of lightweight concrete.Cellular concrete is made on the basis of a mineral binder and silica mineral supplements.The lightweight mesh construction products, most often used for thermal insulation of buildings under construction.

Classification of concrete solutions in strength

Classification of concrete density or strength is carried out according to the type of filler.Additives are light and porous, special purpose and a different density levels.

In addition, additives are distinguished by the factions, which are a decisive factor in ensuring the basic product specifications.

The final properties of the materials are to frost, water resistance and durability.The most commonly used additives and fillers in the form of expanded clay, limestone, gravel, diabase and granite.

Classification of fillers and existing concrete density:

1. Lightweight concrete compositions - are classified by density, which may range from 500 kg per m3 to 1800 kg per m3.Lightweight materials are manufactured using expanded clay, volcanic glass and other fillers which have a porous structure.Classification of lightweight concrete allows to divide them into light cellular products, foam concrete and aerated concrete blocks;
2. Heavy concrete - in the classification of such formulations are taken into account indicators of the strength of which can be from 1800 kg per m3 to 2500 kg per m3.Additives for concrete are heavy mountain of rock, such as granite or diabase;
3. especially heavy concrete - made with the addition of iron ore, or with the use of small metal waste.The solutions meet the indicator of strength of 2,500 kg per m3.

Classification of concrete solutions for brands

Classification of concrete solutions for the brands carried in the range from grade 50 to grade 1000.

This value is determined by taking into account the volume of cement added to the solution of the concrete unit.The strength of the concrete compressive substance calculated in kg per cm2.

Accordingly, the name of the concrete marks denoted by the letter M, with figures going after her.

large numerical designation indicates a high strength solutions, and thus confirms its high quality.

Thus, the higher the grade of concrete, the more difficult to work with him as part of a high-density hardens quickly.

is therefore very important to choose the right concrete structure in terms of density, which would be perfect for the construction of a particular object.

For example, in the manufacture of pillows under the pouring of the foundation, during roadworks used concrete grades 100 or 150.

In the manufacturing process of the blind area, tracks and ties, increasing the concrete stamps going up indicator with the strength of 200 and 350.

This stampM350 is one of the most common, as its universal properties meet all the requirements of individual building.

M350 is used in the construction of different types of foundations in the process of construction of concrete steps and walls of the support elements.

In addition, the mark 350 has found its application in commercial construction.

With its help get the foundations solid design, solid beams and walls, as well as street paving, the properties of which can withstand high mechanical loads.

As a result, brands such as 250 and 300, slowly go to the construction market.

Technical features brands with high digital indicators 400 and 450, allow their use in the construction of hydro-technical facilities, with the expectation of high loads.

higher grade concrete - M500 and M550 are used for the construction of structures with specific technical requirements (underground dam or dam).

Types:

Types of concrete materials in class

Despite accurately calculated ratio of the components of concrete components, yet his strength characteristics may vary.

explain this fact can be the quality of the components used.

example, during the preparation of the solution or water of poor quality sand were used, and that the effect on the strength properties of the finished product.

In addition, inaccurate observance of technology proizvodstvastroitelnoy mixture, the binding characteristics of the composition and the.the conditions of his placement, also affect the reception of the material of the same classification of different strength.

That is why the classification of concrete mixes include such a thing as class.

This figure is determined by the permissible error of the quality of the finished mixture, but with the proviso that in 95 percent of cases, its density will match the rate.

When marking on the product indicates the class of the letter "B" and her subsequent numerals.More common are: B-7.5;AT 10 O'CLOCK;B-15, 20.30.The full range includes classes from 3.5 to 80.

In drawing up the project documentation for any construction work not correctly indicate the brand of concrete, and its class.

While some projects still contain a symbol of the brand, to translate it into the classroom allows table relation of concrete strength below.

In addition, the classification of the material by grades and class is not only due to its constituent components, and their proportions.

For example, to prepare a concrete brand M100 B-7.5, in accordance with existing standards, take M400 or cement 500. In what proportions these types of cement are to be used, the table below shows.

Classification concrete structure Intended

classification of this type of building materials based on their functions allows you to make the right choice for the construction of a particular object.

Typically, in the manufacture of special grades concretes solves the problems associated with the operation of future facilities in extreme conditions.

usually increased requirements for their fire resistance, resistance to frost and vibrations.

result of this classification are concrete compositions of special and general purpose.

In addition, the construction market, there are hydraulic fluids and materials intended for the construction of runways of airfields.

consider in detail the classification of the functional purpose:

1. Concrete structure general purpose - found its application in the construction of foundations, load-bearing w / concrete structures, slabs for intermediate floors in the building columns and beams;
2. compositions for special purposes - used in the construction of facilities, which are expected from a high rate of resistance to mechanical stresses and environmental influences, including chemical nature.With spetssostavov built nuclear power plants and other facilities to prevent possible leaks of radiation;
3. Engineering Materials - are indispensable in the construction of hydroelectric power plants, the construction of dams and water-pressure designs.