Specific Gravity of Soil

Written by Jerry Ratzlaff on . Posted in Geotechnical Engineering

partially saturated soil 1Specific gravity of soil, abbreviated as \(SG_s\), a dimensionless number, the mass of solids in the soil compared to the mass of water at the same volume.

 

Specific Gravity of soil formulas

\(\large{ SG_s = \frac{ \rho_s }{ \rho_w }  }\)  
\(\large{ SG_s = \frac{ M_s }{ V_s \; \rho_w }   }\)  
\(\large{ SG_s = \frac{ W_s }{ V_s } \; \gamma_w  }\)   

Where:

\(\large{ SG_s }\) = specific gravity of soil

\(\large{ \rho_s }\)  (Greek symbol rho) = density of soil

\(\large{ \rho_w }\)  (Greek symbol rho) = density of water

\(\large{ M_s }\)  = mass of soil

\(\large{ \gamma_w }\)  (Greek symbol gamma) = unit weight of water

\(\large{ V_s } \) = volume of solid soil

\(\large{ W_s } \) = weight of soil

 

Tags: Equations for Weight Equations for Soil Equations for Geotechnical