Geomembrane-sand interface frictional properties as determined by inclined board and shear box tests

摘要

Geomembrane-sand interface shear strength parameters were measured using inclined board and standard size direct shear box tests. Ottawa sand with well-rounded particles and a crushed stone with very angular particles but of very similar size range and gradation along with smooth and rough HDPE geomembranes were used in the experiments. Inclined board tests were conducted under a normal stress range of about-5-50 kPa on variable size interface areas. In direct shear tests the applied normal stresses were 14-200 kPa.