Physical
properties
| Water
Absorption |
The
capacity of water absorption is not more than 1.0% |
| Hardness |
Lies between 6
to 7 on Moh's Scale Density 2.32 to 2.42 Kg/m3 |
| Porosity |
The porosity varies
from low to very low. |
| Compressive Strength
|
Varies from 365
to 460 Kg/m2 |
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
Indian
sandstone has high quartz content and its fine grain
gives it a high density. This makes it hard, frost-resistant
and hard-wearing. Its low porosity and high strength
means it is resistant to almost any kind of wear |
