In the sand replacement method (IS 2720 Part 28) for field density determination, the volume of the excavated hole is found by:
Choose the correct answer
Measuring the diameter and depth of the hole
Using a graduated cylinder of water
The volume of calibrating sand poured into the hole minus cone volume
The weight of soil removed divided by unit weight
Correct Answer
C. The volume of calibrating sand poured into the hole minus cone volume
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In sand replacement method: Standard sand of known density is poured into the hole via a sand cone device. Volume of hole = (weight of sand in hole) / (density of calibrating sand). Cone volume is determined separately.
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