FRICTION ANGLE OF SOIL AND ROCK
Gravel poorly granulated GP 30 40 0 Gravel with a lot of fine particles GF 30 35 0 Sand well granulated SW 30 35 0 Sand is well granulated with clay binder SC 35 40 4 90 9 81 Sand of uniform composition SU 30 35 0 Sand poorly granulated SP 25 30 0 Sand with a lot of fine particles SF 15 25 4 90 9 81 Dust silt of low plasticity ML 10 22 9 81 14 71 Clay of low …