Multiple choice

Compaction of an embankment is carried out in 500 mm thick layers. The rammer used for compaction has a foot area of 0.05 sq. m and the energy imparted in every drop of rammer is 400 Nm. Assuming 50% more energy in each pass over the compacted area due to overlap, the number of passes required to develop compactive energy equivalent to Indian Standard light compaction for each layer would be

  1. 10

  2. 16

  3. 20

  4. 26
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Indian Standard light compaction energy is 595 kN-m/m^3. Equating the total energy imparted by the passes considering layer thickness, rammer area, energy per drop, and the 50% overlap factor leads to the required number of passes equaling 26.

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