Soil Mechanics and Foundation
During the first stage of triaxial test when the cell pressure is increased from 0.10 N/mm² to 0.26 N/mm², the pore water pressure increases from 0.07 N/mm² to 0.15 “N/mm². Skempton’s pore pressure parameter B is

2
-2
-0.5
0.5

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Soil Mechanics and Foundation
With the increase in the amount of compaction energy

both optimum water content and maximum dry density increase
optimum water content decreases but maximum dry density increases
both optimum water content and maximum dry density decrease[ES 93]
optimum water content increases but maximum dry density decreases

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