The
chemical constitution of sandstone is the same as that of sand, the rock
is thus composed essentially of quartz. The natural cementing material
that binds the sand together as rock is usually composed of silica,
calcium carbonate, or iron oxide. Chemically sandstone is very resistant
Mono-Mineralic rock, with silica as the principal. The percentage of
each constituents is as follows:SiO2 93-94%
Iron (Fe2O3) 1.5%-1.6%
Alumina (Al2O3) 1.4 to 1.5%
Soda (Na2O) & Potash (Kro) 1.0% to 1.2%
Lime (CaO) 0.8% to 0.9%
Magnesia (MgO) 0.2 to 0.25%
Loss On Ignition (LOI) 1.0% to 1.2%
They are highly resistant to acids, alkalis and thermal impact.
Forms
of Sandstone
