Porosity :
- Porosity is the degree of which volume of the material of the material is interspersed with pores . it is expressed as ratio of the volume of pores to the of the specimen
- Porosity is indicative of other major properties of material, such as bulk density heat conductivity , durability, etc.
Void Ratio :
- It is the ratio of volume of voids to volume of solid.
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Building Materials