28 

 PRACTICE 13 



Determination of Porosity, 

 second method. 



Find what percent the apparent specific gravity is of the real 

 specific gravity and subtract this from 100 percent. The remainder 

 expresses the percent of pore space in the soil. 



Use the results in Practice 9 and 11, and determine the pore space 

 for loose and compact soils and express the results In tabular form. 



The porosity of soils varies as the apparent specific gravity. 



Why? 



