Confining Pressure, Grain Angularity, and Liquefaction

Substantial decrease in resistance to liquefaction is shown to occur with increase in confining pressure for a rounded and an angular sand having identical gradation. For a given increase in confining pressure, angular sand suffers a larger loss in resistance than rounded sand. At equal relative densities, angular sand is shown to be more resistant to liquefaction at lower confining pressures but less resistant at higher confining pressures than rounded sand.