Gravel

Gravel

Gravel is the bulk formed at natural destruction of rocks. According to the characteristic of fineness of grain it belongs to large loose construction material. The size of its grains fluctuates from 5 to 70 mm. Gravel is natural material, in the place of a bedding distinguish river, sea and ovrazhny (mountain) gravel. According to the invoice of a surface dissolve mountain gravel which has a rough surface, and incorporates impurity of sand, clay, dust and organic substances. Than it river and sea gravel is other. It purer and its surface smooth. But it is better to use it in a shredded look (crushed stone) since the smooth surface interferes with coupling with cement and sand solution.