The ratio of grade and grade of concrete + the main purpose

The scope of application of building mixtures is determined by the strength characteristics, which are achieved due to the higher content of the binder and the quality of coarse aggregate. When considering the ratio of the class of concrete and brand of concrete can be compared with a small measurement error in compression. Parameter testing is performed in the laboratory on control samples.

Main correspondence table

Strength characteristics of building compositions are set by classes, which is reflected in the documentation of SNiP 2.03.01-84. However, many construction companies continue to use stamps as their primary reference. Therefore, it is often necessary to compare these indicators with each other.

Attention! The above table of the ratio of grade and grade of concrete helps to establish compliance with the coefficient of variation of the strength characteristics of 13.5 percent.

Using popular brands

The scope of building mixtures primarily depends on the ability to carry those or other loads. To understand what composition to prepare for the work, you need to know its purpose. Then it will be possible to create a high-quality structure, the price of which will meet the needs.

M100

The solution of this brand is used most often during the preparatory work, when laying the grounds. It is practically not used as a construction material. With it, insulation of buildings is often carried out.

M150

This composition is ideal for the device of garden paths and platforms with a small load, as it has sufficient strength for this. In most cases, it is used to further strengthen massive structures and create a layer of insulation.

M200

This mixture has already received great popularity, because it can be used when constructing a floor screed, blind area, strip foundation, designed for relatively small buildings. As for road construction, the mortar is used here to form a monolithic cushion under the base layers.

M250

The main purpose of the composition is the manufacture of tape, pile-grillage and tiled bases, as well as lightly loaded floors, stairs, retaining walls. Along with this solution is used in the construction of various fences and massive fences.

M300

When capital construction is being carried out directly with your own hands, this brand of concrete is often ordered. The combination of low cost and technological characteristics allows us to speak about the universality of the composition. The main scope of application - the construction of all types of foundations and load-bearing floors and walls.

M350

A mixture with such strength characteristics is appropriate for the construction of foundations for high-rise buildings and floors with increased requirements for reliability. With the help of the solution, columns, beams, as well as reinforced concrete products and structures are constructed.

M400 and above

This brand of concrete and those above it are mainly used for special facilities, hydraulic structures, basements, bridge structures, bank vaults and other systems requiring increased stability in difficult conditions. In the individual construction of such compositions are used quite rarely.

Effect on strength

After the ratio of grades and classes of concrete was considered, as well as their purpose, it is worth mentioning the factors that have a significant impact on the strength properties of the compositions.

However, some of them are decisive in the preparation of mortar.

1. The amount of binder contained in the solution can be considered the most important factor. This must be taken into account when mixing, strictly observing the proportions. To get a certain class, you should connect all components as precisely as possible.
2. The important role played by the activity of the cement. Usually on the pack indicates the product brand, the number of which will depend on the amount of the substance added. With the increase in the number decreases the content of the binder directly in the mixture.
3. Water cement ratio has a certain value. With a decrease in fluid strength increases. Excessive water leads to the formation of pores in the hardened composition, so the technical characteristics are markedly reduced.
4. Should be taken into account and the quality of the placeholders. If fine-grained materials with organic impurities and dust fractions are used in the preparation of the solution, the quality of the finished mixture will decrease.
5. The quality of mixing of the liquid mass and the degree of its compaction have a significant effect.. Therefore, when mixing components, it is recommended to use a concrete mixer and vibration equipment.

Note! The choice of concrete solution should be made according to GOST 27006-86, in points of which basic recommendations are presented. After reviewing the documentation, you can avoid serious mistakes.

Finally

Чтобы было проще разобраться в классах и марках бетона, а также в назначении строительных составов, была представлена данная инструкция. После ознакомления с видео в этой статье понять материал будет гораздо проще. Однако особое внимание рекомендуется уделить основной таблице (см.также статью «Количество цемента на куб бетона: рассчитываем оптимальные параметры раствора»).