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The soil properties and parameters can be broadly classified as
Physical soil properties include specific gravity, density, particle size and distribution and water content.
The water content represented by w of a soil sample is defined as the weight of free water in the sample expressed as a percentage of its dry weight.
The degree of saturation S is defined as the ratio of the volume of free water to its total volume of voids Vv
where n is the Porosity defined as the ratio of void volume to the total volume V of soil.
We need to calculate the value of e which is the void ratio to calculate degree of saturation. Once we know the value of e we can find S
where Gs – specific gravity of the soil particles and is usually in range of 2.67+ -0.05
The dry unit weight Yd(pronounced as gamma) of a soil specimen with any degree of saturation is calculated using the following formula
where w =unit weight of water having following values
Freshwater – 62.4 lb/ft3 or 1001 kg/m3
Seawater – 64.0 lb/ft31026.7 kg/m3
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