Concrete is the most necessary and necessary material at a construction site. No construction can do without it. It has excellent properties and low cost.
Of the four main components, concrete consists. This, cement, gravel, sand, water. But other different special fillers can be added to the concrete mixture, which improves the properties of concrete. Using certain ratios of the main components, the concrete of a certain brand is obtained.
Concrete is the most necessary and necessary material at a construction site. No construction can do without it. It has excellent properties and low cost.
Of the four main components, concrete consists. This, cement, gravel, sand, water. But other different special fillers can be added to the concrete mixture, which improves the properties of concrete. Using certain ratios of the main components, the concrete of a certain brand is obtained. For example, brand 150 concrete is obtained using the ratio of three parts of the sand with one part of the cement, half of the part of the water and five parts of crushed stone. The most important indicator is the ratio of water and cement, it can determine the hardness of concrete. This ratio should be about 0.5, then the concrete will definitely be strong. If there is a lot of water in the solution, then concrete is made less durable.
Concrete of St. Petersburg is relatively inexpensive, it can be purchased in . Including it is convenient to use and it has a large number of advantages over other different types of building materials.
Class and brand of concrete.
Mark and concrete class are terms that are used in modern construction everywhere. They have almost the same meaning, but the difference is still present. The concrete brand is an average strength of strength, and the class indicates the guarantee of the strength. At the initial stage of construction, during the design and calculations of reinforced concrete and concrete structures, the characteristics of the strength, that is, the brand of concrete and the class of concrete, its indicators of water resistance and frost resistance are established. Requirements and requests for concrete in regulatory documents are recorded exclusively in classes, but during the order of concrete by building companies, concrete in brands is often ordered.
