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About Sandstone

Sandstone is a sedimentary rock group which is mostly made up of tiny grains of quartz. Most sandstone is formed in oceans, lakes and rivers where tiny bits of rock and dirt settle to the bottom. Year after year, these layers of sand get buried under tons of more sand and dirt until it is turned into solid rock. Sandstone can be found in many colors.
Physical Properties of Sandstone Physically, they are very Hard, Compact, Fine grained, equi-granular homogeneous rocks of sedimentary nature (Sandstone)

 

 

Color

Minor color tonal variations exist but within the tolerance limit.

Hardness

6.5 to 7 on Moh's Scale

Density

2.3 to 2.4 Kg/cm3

Compressive Strength

90 to 140 N/mm2

Modulus of Rupture

16-40 N/mm2

Water Absorption

1.0 - 1.2 %

Porosity

Low to very low.

Weather Impact

Resistant

 

Chemical Properties of Sandstone
Chemically they are very resistant Mono-Mineralic rocks, principally composed of silica. The other minor constituents vary from origin to origin.

SiO2

95-97%

Iron (Fe2O3)

0.5%-1.5%

Alumina (Al2O3)

1 to 1.5%

Soda (Na2O) & Potash (Kro)

Less then 1%

Lime (CaO)

Less then 0.5%

Magnesia (MgO)

Less then 0.5%

Loss On Ignition (LOI)

Less then 0.5%

 

They are highly resistant to acids, alkalies and thermal impact. Insolubility in acids and alkalies is about 97%.
Teakwood and Rainbow sandstones differ from above physical properties

Hardness

6 to 6.5 on Moh's Scale

Density

2.07 to 2.11 Kg/cm3

Compressive Strength

41 to 63 N/mm2

Modulus of Rupture

7-11 N/mm2

Water Absorption

8.0 - 11 %

Porosity

Comparatively Porous

Weather Impact

Resistant

 

Ocurrances of Sandstone

India

Bari Railway station in Bharatpur district
Jodhpur, Kota, Sawai, Madhopur, Bundi, Bikaner, and Bhilwara
Indore, Damoh, Bilaspur, Rewa, Nimar, Sagar, Satna, Raigar,and Shahdol districts in Madhya Pradesh
Dholpur, Sawaimadhopur, Chittorgarh, Nimbhahera, Jhalawar, Pali and Jaisalmer in Rajasthan
Kynshi River, West Khasi Hills district, Meghalaya
Bagia Nala, Bargarh district in Chattisgarh
Sitla Mata, Gwalior district, Madhya Pradesh
Dhaula dhar and siwalik range of the himalayan in Hinachal Pradesh

Scotland

Watlen, Caithness
Elgin, Moray
Byness, Lothian
Lockerbie, Dumfries & Galloway

Algeria

Jurjura and Shellata