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The specific gravity of most of the stones lies between ________.
1 and 2
3 and 3.5
2 and 3
3.5 and 4
2 and 3
The specific gravity of natural building stones generally ranges between 2.0 and 3.0. This parameter serves as an indicator of the density and, by correlation, the strength and durability of the stone.
IS 1122:1974 (Method of test for determination of specific gravity of building stones)
The specific gravity of natural building stones generally ranges between 2.0 and 3.0. This parameter serves as an indicator of the density and, by correlation, the strength and durability of the stone.
G=V├Ч╬│wтАЛWsтАЛтАЛ тАФ where G is specific gravity, WsтАЛ is the weight of stone, V is volume, and ╬│wтАЛ is the unit weight of water.
Specific gravity is defined as the ratio of the weight of a given volume of stone to the weight of an equal volume of water at 4┬░C. Stones primarily composed of minerals like silica (SiO2тАЛ) have lower values, while those containing iron oxides or heavier metallic elements approach the upper limit of the 3.0 range.
Most common construction stones like granite, sandstone, and limestone fall within the 2.0 to 3.0 range.
A specific gravity greater than 2.5 is generally considered desirable for structural masonry and pavement applications.
Higher specific gravity often correlates with lower porosity and higher compressive strength.
Useful for calculating dead loads of structural masonry elements.
Provides a quick qualitative assessment of stone density and potential weathering resistance.
Specific gravity alone does not account for micro-cracks or internal discontinuities that affect strength.
Variations in mineral composition within the same quarry can lead to fluctuations in measured values.
Quality control in stone masonry construction.
Classification and selection of aggregates for concrete production.
Estimation of unit weight for foundation design calculations.
Granite typically exhibits specific gravity around 2.6 to 2.7.
Sandstones can range from 2.1 to 2.6 depending on the cementing material.
Option B (3 to 3.5) represents unusually heavy/dense rocks, while options A and D fall outside the typical range for common building stones.
C is correct тАФ The specific gravity of most of the stones used in construction lies in the range of 2 to 3.
For competitive exams, remember that heavy stones (specific gravity > 2.7) are generally preferred for hydraulic structures like dams and breakwaters to withstand uplift and wave forces.
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