Civil Engineering MCQJE Level Civil Engineering
The field density test using the sand replacement method (IS 2720 Part 28) is performed to determine the:
Soil MechanicsField Compaction ControlHARD
Choose the correct answer
A
Optimum moisture content of soil in field
B
In-situ dry density of compacted fill
C
Shear strength of compacted embankment
D
California Bearing Ratio of subgrade
Correct Answer
B. In-situ dry density of compacted fill
Why is this the answer?
Sand replacement method: excavate a small hole, measure volume using calibrated sand, weigh removed soil and find moisture content → compute in-situ dry density. Compare with laboratory OMC/MDD to assess compaction quality (typically require ≥95–98% of MDD).
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