Sand (elimination) - loose, loose mortar, consisting of fragments of minerals: quartz, feldspar, mica, with a touch. Obtained as the screening of crushed stone. The grain size in the sand vary from 0.1 to 5 mm. The sand used in the construction as additives (fillers).

Sand has a high degree of purification and substantially free from impurities that clay impurities, organic, which makes it a universal building material. The sand commonly used for concrete production, in the housing and particularly in the road construction industry for preparing asphalt mixtures, and laying roads.