## Density of Cement, Sand and Aggregate

Density is also called the unit weight of a substance. It is represented by a symbol called a line (p). Density represents the degree of compactness of a material. If the material is of higher density, it is more compacted material.

The **density of construction materials is their Mass per unit volume of materials**. It is expressed in** kg / m ^{3} or lb / ft^{3}** and shows the compactness of the construction material.

**The density can be expressed as**

**p**=**m/V**=**1/v**

**Where**

**p =****density [kg / m**^{3}], [slugs / ft^{3}]**m = mass [kg], [slugs]****V = volume [m**^{3}], [ft^{3}]**v = specific volume [m**^{3}/ kg], [ft^{3}/ slug]**Conversion: 1 kg / m**^{3}= 0.624 lb / ft^{3}

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