Various concrete brands are used in multi -storey and commercial construction. Concrete M350 with a strength class of 25 is necessary when installing monolithic foundations, beams, cups of pools, columns and other structures, including objects designed for operation in difficult extreme conditions. The mixture is resistant to external influences, which allows it to withstand high loads.
The composition of concrete.
In the manufacture of concrete of the brand M 350, class in 25, sand, cement, crushed stone, water and special additives are required, which are required to improve its characteristics. In the solution of any concrete mixture, all ingredients should be in certain proportions. Making concrete, with characteristics M 350, manufacturers add a lot of cement, which quickly grasps, so the material should be promptly delivered to the construction site. The composition uses granite or gravel crushed stone, the choice of this ingredient depends on the specific conditions of construction and the existing budget.
The amount of cement in concrete M-350 is described in the Rules SNiP 82.02.95, for monolithic concrete, this position recommends using 380 kg/m3 cement m 400. The material consists of four parts of crushed stone (granite increases frost resistance), two parts of sand, part of cement and 0.5 part of water.
Differences.
When buying concrete, the requirements for all elements in which it will be applied are taken into account, so its characteristics are very important. The scope of its use depends on the class of strength, mobility, water resistance, frost resistance, brand and other concrete indicators. In case of any doubt, you should definitely make a choice in favor of a higher brand, with the best indicators.
Due to the fact that the commodity concrete M350 is used in the construction of responsible structures that require extreme and high loads, so it is not worth saving on it. Unlike lower brands, this composition has a higher compression of compression and other characteristics, as well as, it uses a higher brand of cement.
The most suitable brands replacing M-350 concrete are M 300 and m 400. Depending on the purpose of building structures, they can become substitutes for this concrete. The mix of m 300 can be used to fill foundations for low buildings, it is also advisable to use it for slabs and beams used at low loads. M 400 will replace the M-350 in the construction of bowls of pools, columns and crossbars.
Prices.
When buying concrete M350, it is necessary to take into account the type of crushed stone, which is part of it, the brand of cement, as well as frost resistance and other characteristics. The cost also depends on its manufacturer, other fillers and additives that improve its quality. One cubic meter of concrete composition M350 costs from 3400 to 4000 rubles.