Properties of Soil: Lecture 1

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‘Porosity’ of a soil mass is the ratio of the volume of voids to the total volume of the soil mass.
‘Void ratio’ of a soil mass is defined as the ratio of the volume of voids to the volume of solids in the soil mass.
‘Degree of saturation’ of a soil mass is defined as the ratio of the volume of water in the voids to the volume of voids.
‘Percent air voids’ of a soil mass is defined as the ratio of the volume of air voids to the total volume of the soil mass.
‘Air content’ of a soil mass is defined as the ratio of the volume of air voids to the total volume of voids.
‘Water content’ or ‘Moisture content’ of a soil mass is defined as the ratio of the weight of water to the weight of solids (dry weight) of the soil mass.

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