Commodity concrete v15 m200 in the construction of

Commodity concrete B15 in terms of its technical parameters and performance, based on the brand classification, most fully corresponds to structural concrete of the M200 brand, therefore in construction standards and the trade nomenclature this position of the building material is called B15 M200.

Currently, it is this brand of mortar that has received wide popularity due to the fact that it is the most demanded material in the construction of residential houses, industrial facilities, as well as municipal and commercial real estate.

The use of heavy concrete in individual construction

Для того чтобы детально разобраться в особенностях использования этого материала, в данной статье будут рассмотрены технические характеристики concrete В15, описаны его основные свойства и главные эксплуатационные качества.

In addition, the reader will be presented with detailed instructions, which describes the technology of self-preparation of concrete solution at the construction site.

The composition of the concrete mix

In its composition, the concrete mortar is a thick aqueous mixture of mineral building materials, thoroughly mixed together in a certain proportion.

1. The binder of concrete solutions of this class of strength is high-quality Portland cement M300 or M400. When interacting with water, it reacts to hydration, as a result of which its particles are tightly bound to each other, forming a high-strength cement stone.
2. As fine aggregate, river or quarry sand of quartz sand is used without impurities.. Its particles fill all the free space between the coarse aggregate fractions and are the link between cement and gravel or rubble.
3. Granite rubble or gravel is a large aggregate, the particles of which are held together with the help of a cement-sand mortar, and after solidification of the monolithic massif they take up the main part of the operational load.
4. Adding water to the building mixture performs three important functions at once: firstly, it promotes thorough mixing of all mineral components, secondly, water provides the solution with the necessary physical parameters (liquid consistency, necessary viscosity and mobility), and thirdly, the presence of water is imperative for the hydration process, without which cement will not harden.

   Note! To improve the performance of a liquid solution (increase plasticity, frost resistance, water resistance), in the process of preparation, appropriate modifying additives are introduced into its composition.

Main characteristics

According to its technical characteristics, structural concrete of the B15 brand belongs to the class of heavy concrete, since for its production, high-density rocks (quartz sand, limestone or granite crushed stone, gravel, etc.) are used as fine and coarse aggregates.

Based on the physical properties of the main components and the quantitative and qualitative composition of the mixture, the concrete solution of this brand has the following technical characteristics.

1. The average density of the finished solution can be from 2000 to 2500 kg / m ?, depending on the type of coarse aggregate used.
2. According to the average compressive strength, concrete class B15 is able to withstand a load of up to 196 kg / cm ?.
3. According to the workability class, the mortar has an indicator of P3, which characterizes it as a very mobile solution.
4. The frost resistance of the solid mass after freezing has the F100 mark, which corresponds to 100 freeze / thaw cycles with a loss of strength of 25% of the design value.
5. The waterproof mark W4 means that a solid plate 150 mm thick after solidification is capable of holding water pressure of 4 kgf / cm ?.

The setting time of the finished solution, without the use of modifying additives can be from 4 to 12 hours, depending on the temperature and humidity of the ambient air. The time of complete solidification of the solid mass under normal conditions is at least 28 days.

   Note! The average density of the finished solution also depends on the size of the coarse aggregate fraction. With a decrease in the size of the fraction, the value of the average density of concrete increases.

Cooking technology

The high quality of the final result of the work, ease of installation, wide availability and low price of the concrete solution B15 make it the most common building material among individual developers and owners of suburban areas.

Table 1 presents the recipe for the preparation of concrete solution B15 with varying degrees of mobility.

When carrying out construction work on your own site, it is easy to prepare such a solution with your own hands, without assistance.

To do this, you need to have an electric concrete mixer and a set of necessary building materials.

1. Set the concrete mixer on a flat horizontal surface, giving it a stable position.
2. Pour the right amount of water into the bucket and, if necessary, add plasticizers or modifying additives, then start the engine and let it work a little.
3. In the bucket of a working mixer pour half of the calculated amount of sand, then the entire volume of cement, and then the rest of the sand.
4. After thoroughly mixing the components of the cement-sand mortar, in small portions load the entire volume of coarse aggregate in the form of gravel or crushed stone.
5. Visually determining the quality and readiness of the solution, without stopping the rotation of the concrete mixer, gradually turning the bucket, unload the finished solution in the appropriate container or immediately inside the installed formwork.

Conclusion

After reading this article, we can conclude that the commercial concrete solution B15 M200 is a versatile material and is widely used in almost all sectors of construction.

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