Choose the correct option
It is more difficult to reduce the air content in uniform fine sands, than in well-graded soils. This is thought to be due to:
compactive energy absorbed by pore pressure changes True False
grains being moved around, but not closer together True False
water 'sticking' to the grains & holding them apart True False
large air-pockets forming which cannot be compressed True False
Both grading and plasticity affect the degree of compaction. So, a HIGHER compacted density can be achieved with:
well-graded coarse soils True False
fine soils of low plasticity True False
soils with a high clay content True False
fine soils in general True False