Contents

## Density

The density or unit weight of a soil mass is defined as its weight per unit volume.

### a. What is Bulk DensityÂ (đť›ľ)

The **bulk density** or moist densityÂ đť›ľÂ is defined as the total weight (W) as a soil mass per unit of its total volume (V).Â **Thus,Â đť›ľÂ =W/V**

### b. What is Submerged Density (đť›ľsub)

The submerged density or buoyant unit weight is defined as the submerged weightÂ ( )subÂ of the soil solids per unit of total volume (V) of the soil mass.Â

Thus, It is also expressed as,

Where

**is the density of water andÂ Â is the saturated density of soil.**

### c. What is Dry Density

The dry density or dry unit weightÂ đť›ľdÂ is defined as the weight of solids ( ) per unit of total volume (V) of the soil mass.Â **Thus,Â **

### d. What is Saturated Density

When the soil mass is saturated, its bulk density is called the saturated density. Thus saturated density is the ratio of the total weight of a saturated soil sample ( ) to its total volume (V).Â **Thus,Â **

### e. What is the Density of Solids

The density or unit weight of soil solids Is the weight of soil solids ( ) per unit volume of the solids ( ).Â **Thus,**

*Read also:*Â

**Define Specific Gravity, Bulk Specific Gravity, Air Content and Percentage Air Voids**Â

**What is Porosity, Void Ratio, Water or Moisture Content, And Degree of Saturation of Soil**