1.1 This standard (Part XXXIX/Sec 1) covers the method for the laboratory determination by direct shear, of the shear strength of soils containing gravel (with particle size more than 4.75 mm).
Note — It is recommended that the 300-mm box shall be used for soils containing gravel up to 30 mm size.
1.2 The test shall be carried out at natural moisture content. In case, the deposit is likely to get saturated, the test shall be carried out in the saturated condition.