Question

Why do geotechnical engineers specify greater compaction effort than the standard proctor test?

Answer 1

Geotechnical engineers specify greater compaction effort than the standard test because in standard test the number of layers being used to fill the mould is three with 25 number of blows in each layer.

But if compaction effort is greater than standard test then for this number of layers have to be increased this will lead to increased number of blows in each layer like in modified prctor test than standard test.

When compaction effort is increased then compaction achieved will be more. Dry density obtained will be more and corresponding optimum moisture content will be less as compared to standard test.

So when compaction effort is increased then degree of compaction achieved will be greater also that is why geotechnical engineers specify greater compaction effort than standard pest.

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