A Unit of Swarup Group
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Sandstone is a sedimentary rock composed essentially of quartz grains cemented by siliceous, felspathic, calcareous cementing matters. The durability and strength of these rocks depend on the cementing material. The best quality sandstone, for building purpose, should be of fine grain and uniform texture. The colour of the sandstone may be either white, grey, yellow, buff, brown or red. |
| PHYSICAL PROPERTIES OF SANDSTONE & QUARTZITE | |
| Color | Minor color tonal variations exist but within the tolerance limit. |
| Hardness | 6 to 7 on Moh's Scale Density 2.32 to 2.42 Kg/m3 |
| Compressive Strength | 365 to 460 Kg/m2 |
| Water Absorption | Not more than 1.0 % |
| Modulus of Rupture | 197-200 Kg/cm2 |
| Porosity | Low to very low. |
| Weather Impact | Resistant |
| CHEMICAL PROPERTIES OF SANDSTONE & QUARTZITE | |
| Chemically they are very resistant Mono-Mineralic rocks, principally of silica. | |
| 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 avoids, alkalis and thermal impact. Insolubility in acids and alkalis is about 97%. | |
