A sandstone is a detrital sedimentary rock, which is a homogeneous or layered aggregate of detrital grains ranging in size from 0.0625 mm (according to foreign criteria) to 2 mm (grains of sand), bound by any mineral substance (cement).
Sandstones are formed as a result of the destruction of rocks, the transfer of debris by water or wind, and deposition, followed by cementation. The degree of roundness of the fragments and the degree of sorted by grain size indicate the extent of the transfer of fragments from the place of initial formation. The overwhelming majority of sandstone varieties are dominated by quartz, as the most physically and chemically stable mineral.
The density of the sandstone is 2250-2670 kg / m³; porosity 0.69-0.70%; water absorption 0.63-6.0%. Sandstone with siliceous and carbonate cementing substance has the highest physical and mechanical properties, the worst - with clayey. Refractoriness of sandstone is also different, the highest (up to 1700 ° C) is typical for pure quartz sandstones with siliceous cement.PHYSICOCHEMICAL PROPERTIES
|Volumetric weight:||2250-2670 kg / m³|
|Compressive strength:||up to 300 MPa|
|Refractoriness:||up to 1700 °C|