Concrete is ordered in Shchelkovo in spetsializirovannyh companies in Shchelkovo is a company which produce concrete and the companies that implement the concrete. The quality of concrete is determined by many factors: quality, quantity and brand of cement used, the quality and quantity aggregates, by proper selection of the ratio between the applied cement and aggregate; proper consumption of water in the preparation of the concrete mix; the quality of preparation of concrete mixtures. Concrete, concrete mix, concrete is the most used construction material.