Sand is not only natural, but also artificial. The main component of sand is silicon dioxide, which is an ordinary quartz.
The sand has a loose consistency and consists of microparticles, the size of which varies from 0.15 to 5 millimeters. Sand is formed with the gradual destruction of the rock. Sand is mined in the river, sea water, as well as in the mountains and special quarries.
Sand is added to concrete, construction compositions, dry mixtures. To create super -resistant and reliable structures in the form of motorways and airfields, sand taken from quarries located off the river shores is used.
River sand is an order of magnitude higher than sand mined in a career. The fact is that such sand is cleaned from crushed stone directly in the career and gets rid of other extraneous substances. Career sand may contain clay, which does not allow the composition to sag. There are also crushed stone stones. The most in demand today is sand and gravel. It is ideal for the manufacture of concrete, residential buildings, roads. They are performed by high -quality reinforced concrete products.
Heavy sand is a loose substance, the particles of which are formed as a result of crushing the rock. At the same time, grains of sand is rough and sharp.
Sand is considered environmentally friendly material, therefore it is widely used in construction industries. It does not provoke allergies, does not irritate the skin and does not spoil the atmosphere in the room. Fluid sand, so quickly fills all the spaces and gaps of wall masonry. As a result, wall surfaces acquire excellent isolation.
Sand does not support combustion and has a high melting point. When heated from it, harmful substances do not evaporate. The material is part of many structures and perfectly extends their service life. It is not exposed to decomposition, as it has inorganic substances. Sand is a rather budgetary and economical material.
Sand is added to the plaster composition, concrete is released from the career form. Sand is present in all foundations and various masonry. Small -grained sand goes to the putty. He does not respond with water and other viscous substances, so concrete after the hardening process gives a completely slight shrinkage. To create a warm floor, the cement screed is strengthened with sand. Sand also perfectly absorbs noise and retains heat.