Soil Mchanics / Void Ratio / Porosity / Relation between void ratio and porosity


Soild Mechanics : Soil mechanics is one of the most important subject of civil engineering. The feild of soil mechanics is very vast . On examination point of view , soil mechanics most important subjects . Now we are discuss Void ratio , Porosity and Relationship between them .

VOID RATIO : The ratio of the volume of voids to the volume of soil solids in the given soil mass is called void ratio .
 Let ,
          Vv = Volume of voids
           Vs = Volume of soil solids
           
            Void Ratio (e) = Vol . of voids / Vol . of solids
                                    = Vv/ Vs
 POROSITY : The ratio of the volume of voids to the total volume of the the given soil mass is called porosity .
Let ,
             Vv = Volume of voids
               V = Total volume of soil mass

            porosity ( n) = Vol . of voids /  Total vol . of soil mass
                                 = Vv / V
Relationship between Void ratio & Porosity :
       

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