Wet Bulk Density of Soil

Written by Jerry Ratzlaff on . Posted in Geotechnical Engineering

partially saturated soil 1Wet bulk density of soil, abbreviated as \(Y_{sat}\), is the ratio between the total mass of soil and the total volume of soil.

 

Wet bulk density of soil formulas

\(\large{  \rho_{sat} = \frac { m_l \;+\; m_s} {V_t } }\)   
\(\large{ \rho_{sat} =  \frac{ G_s \;+\; e }{ 1 \;+\; e } \; \rho_w   }\)  
\(\large{ \rho_{sat} =  \frac{ G_s \; \rho_w \; \left( 1 \;+\; w  \right)  }{ 1 \;+\; e }  }\)  

Where:

 Units English Metric
\(\large{ \rho_{sat} }\)  (Greek symbol rho) = saturated bulk density of soil \(\large{ \frac{lbm}{ft^3} }\) \(\large{ \frac{kg}{m^3} }\)
\(\large{ \rho_w }\)  (Greek symbol rho) = density of water \(\large{ \frac{lbm}{ft^3} }\) \(\large{ \frac{kg}{m^3} }\)
\(\large{ m_l }\) = mass of liquid \(\large{lbm}\) \(\large{kg}\)
\(\large{ m_s }\) = mass of solid \(\large{lbm}\) \(\large{kg}\)
\(\large{ SG_s }\) = specific gravity of soil \(\large{dimensionless}\)
\(\large{ V_t } \) = total volume of soil \(\large{ft^3}\) \(\large{m^3}\)
\(\large{ e }\) = void ratio \(\large{dimensionless}\)
\(\large{ w }\) = water content \(\large{dimensionless}\)

 

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Tags: Density Equations Soil Equations Geotechnical Equations