... the efficiency and decrease the cost of deep compaction by using cylinder-shaped tamper weights. The influence of the shape of the bottom of the tamper weight on dynamic compaction efficiency was evaluated experimentally on sandy soils. Sands of three different densities were used to evaluate the compaction...

... not since they are non-plastic. Hence the high liquid limit values exhibited by coal ashes should be considered as fabric (i.e. structure and arrangement of particles) and not as plasticity characteristics. Dry density against water content relationships for fly ashes, pond ashes and bottom ashes...