Sand-gravel Mix (SGM) of fraction of 0-20 mm

Sand-gravel mixes are subdivided into 2 look: natural – for the device of pavings, the top layer of the bases under coverings, for the draining layers and in other purposes in road construction enriched – receive from natural sand-gravel mixes by enrichment Sand-gravel mixes are applied: for the device of coverings, bases and additional layers of foundations of highways and foundations of airfields for strengthening of roadsides of highways, on the crushed stone applied to the device of coverings and bases on a way of a blocking. as a component at construction of the railroads Sand-gravel mixes characterize: content of gravel and sand in mix; the greatest fineness of grains of gravel; the indicators characterizing gravel and sand (grain composition, the fineness module, durability, content of grains of soft rocks, frost resistance, the maintenance of dust-like, clay and oozy particles, clays in lumps)