Energy in compaction tests

[agus72indo]

Dear all,
Does anybody know how to calculate energy per unit volume of soil induced in standard proctor compaction test. I know the amount of the energy but could not find out how to get that number. I need this information as I am compacting my soils using different number of blows, number of layers and different hammers. I would be glad if anybody can help me. Thanks a lot.

Regards
Agus

 

[trix]

dear agus,

i think the following might help u....

compaction energy (kJ) = {(mass of soils used, kg)x(number
of blows)x(24.5N, which is your
compaction rammer)x(height of
drop, m)}
__________________________________
{(volume of mould, cubic meter)
x1000)}
and your answer would be in kilojoule per cubic meter.

 

[dirtman]

The Standard Proctor D698 Energy is 12,375 foot pounds of energy per cubic foot. It is simply the multiplication of 5.5 pound hammer times 1 foot drop times 75 drops divided by the volume of the mold which is 1/30 cubic foot. This equates to 12,375. The modified effort D1557 test is 10 lbs times 1.5 feet times 125 blows per 1/30 cubic foot of soil or 56,250 ft-lbs energy/cubic foot of soil.