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Chapter 1 of 12 тАв Page 1 of 248ЁЯФТ Protected PDF тАв Watermarked
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Higher the specific gravity of soil particles, more.......... is the particles.
thicker
denser
lighter
none of these
denser
Specific gravity (GsтАЛ) of soil particles is defined as the ratio of the unit weight of soil solids to the unit weight of water. Since GsтАЛ=╬│wтАЛ╬│sтАЛтАЛ, a higher specific gravity indicates that the soil solids are denser compared to the standard reference fluid, water.
Specific gravity (GsтАЛ) of soil particles is defined as the ratio of the unit weight of soil solids to the unit weight of water. Since GsтАЛ=╬│wтАЛ╬│sтАЛтАЛ, a higher specific gravity indicates that the soil solids are denser compared to the standard reference fluid, water.
GsтАЛ=╬│wтАЛ╬│sтАЛтАЛ=╧БwтАЛ╧БsтАЛтАЛ тАФ Ratio of unit weight/density of soil solids to water
The specific gravity represents the mass density of the mineral grains themselves, excluding pore spaces. Higher mineral content like iron or heavy minerals increases the density (rho=fracmV), resulting in a higher specific gravity value. Consequently, these particles are physically heavier for the same volume, making them 'denser'.
Specific gravity is a dimensionless quantity.
Most common soil minerals (like quartz) have a specific gravity of approximately 2.65.
Organic soils typically exhibit lower specific gravity values compared to inorganic soils.
High values often indicate the presence of heavy minerals such as iron or mica.
Essential for calculating void ratio (e) and degree of saturation (SrтАЛ).
Helps in classifying soil types and identifying mineral composition.
Experimental determination requires precise temperature control and air removal.
Does not account for the influence of pore water chemistry directly.
Calculation of void ratio in phase relationship studies.
Determining the unit weight of soil solids in geotechnical design.
Typical range for most soils: 2.60 to 2.80.
Option 'thicker' is incorrect as thickness is a geometric dimension, not a material density property.
Option 'lighter' is incorrect because GsтАЛ>1 implies a substance denser than water.
B is correct тАФ Higher specific gravity implies the solid grains possess a greater mass per unit volume, making them denser.
Remember that GsтАЛ is always constant for a specific soil type; variations in bulk density result from changes in void ratio, not the density of the mineral grains themselves.