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The densities of a soil sample is prepare in correct decreasing order.
Saturated, submerged, bulk, dry
Saturated, bulk, submerged, dry
Saturated, bulk, dry, submerged
bulk, saturated, submerged, dry
Saturated, bulk, dry, submerged
The order of densities for a soil sample, from highest to lowest, is Saturated density (╬│satтАЛ), Bulk density (╬│bulkтАЛ), Dry density (╬│dтАЛ), and Submerged density (╬│subтА▓тАЛ). This ordering depends on the water content and the buoyancy effect acting on the soil particles.
The order of densities for a soil sample, from highest to lowest, is Saturated density (╬│satтАЛ), Bulk density (╬│bulkтАЛ), Dry density (╬│dтАЛ), and Submerged density (╬│subтА▓тАЛ). This ordering depends on the water content and the buoyancy effect acting on the soil particles.
╬│satтАЛ=1+e(G+e)╬│wтАЛтАЛ тАФ Saturated Unit Weight
╬│dтАЛ=1+eG╬│wтАЛтАЛ тАФ Dry Unit Weight
╬│тА▓=╬│satтАЛтИТ╬│wтАЛ тАФ Submerged (Effective) Unit Weight
Saturated density is maximum because all voids are filled with water and water adds weight without increasing volume. Bulk density is lower than saturated because the degree of saturation is less than 100%. Dry density is lower than bulk as the weight of water is removed. Submerged density is the lowest because it is defined as the saturated unit weight minus the unit weight of water (╬│satтАЛтИТ╬│wтАЛ), accounting for the upward buoyant force in underwater conditions.
For most soils, GтЙИ2.65 and e varies, but the inequality ╬│satтАЛ>╬│bulkтАЛ>╬│dтАЛ>╬│тА▓ holds universally.
Submerged unit weight is effectively about 50% of the saturated unit weight.
Dry density is used as a measure of soil compaction, while submerged density is used for calculating effective stress in submerged soil strata.
Provides a clear hierarchy for soil phase relationships.
Critical for calculating overburden and effective stress in geotechnical engineering.
Assumes a constant void ratio for comparison, which may vary under different load conditions.
Earth dam stability analysis.
Foundation settlement calculations in submerged soils.
Option A is incorrect because it suggests bulk is denser than submerged but fails the logical order against dry.
Option B is incorrect as bulk density is consistently higher than submerged density for any non-saturated soil.
Option D is incorrect as it places bulk density above saturated density, which is physically impossible as saturated density represents the maximum possible bulk density at a given void ratio.
C is correct тАФ Saturated density is the highest density state of soil followed by bulk density, dry density, and finally submerged density due to buoyancy.
Remember that ╬│satтАЛ>╬│bulkтАЛ>╬│dтАЛ and always keep in mind that ╬│тА▓=╬│satтАЛтИТ╬│wтАЛ which effectively makes it the smallest value.