Black Cotton Soil is Unsuitable for Foundations Because its

Answer: D. Property to undergo a volumetric change due to variation of moisture content.

Black cotton soil is unsuitable for foundations because of its property to undergo a volumetric change due to variation of moisture content.

Solution

Black cotton soil has less bonding between soil particles, due to this black cotton soil is more susceptible to swelling and shrinkage. Black cotton soil is more susceptible to volume change during the bearing of load from superstructures, due to this black cotton soil is unsuitable for foundations.

Black cotton soil needs to be stabilized before the construction over it. For example Lime can be used as a stabilizing agent for black cotton soil for the construction of roads.

Hence, black cotton soil is unsuitable for foundations because of its property to undergo a volumetric change due to variation of moisture content.

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