Construction sand.
Construction sand is divided into types such as career, sea and river, respectively, the place in which it was mined. The first species differs from the rest by the presence of natural clay, as well as saturation with organic parts. Of course, during construction, these impurities are not needed, therefore, immediately after mining right on the career, this type of building material passes through cleaning measures, becoming truly suitable for the construction of foundations, as well as in the field of road construction for cars as the initial layer of solid coating.