Answer Posted / harshal.s.khode
Specific gravity is defined as the ratio of the unit weight
of soil solids to unit weight of water. The Specific
Gravity is needed for various calculations purposes in Soil
Mechanics, e.g. void ratio, density and unit weight.
For Sandy soil, i.e. soils mostly made of quartz, Specific
Gravity can be accurately estimated to be about 2.65,
whereas for silty and clayey soils, it may vary from 2.6 to
2.9.
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