Question

Higher density and lower optimum water content is easily achieved by _________

(a) Coarse grained soil

(b) Fine grained soil

(c) Cohesion less soil

(d) Saturated soil

I had been asked this question in class test.

This intriguing question originated from Factors Affecting Compaction topic in portion Compaction of Geotechnical Engineering I

Answer 1

Correct option is (a) Coarse grained soil

To explain I would say: Well graded coarse-grained soil attains a much higher density and lower water optimum water content then fine grained soil which requires more water.