Calculation steps of compactness measurement by sand filling method Do not need to write detailed steps, just write the known water content, vertebral mass, cylinder + sand mass, sand density, calculation steps. Calculate wet density, dry density, compactness!
Cylinder + sand mass - residual cylinder + sand mass - vertebral body sand weight = sand mass in test pit
Sand mass / sand density in test pit = Test Pit volume
Wet soil mass / test pit volume = wet density
Wet density / (1 + moisture content%) = dry density
Dry density / maximum dry density = compactness
The maximum dry density is obtained from laboratory test