Class (1) Fill
Class 1 fill is a crusher run type material normally used as a road base. It shall be good, hard well-graded material screened and crushed as necessary to lie within the grading envelope given below when tested. The fill material shall be non-plastic when tested and the content of clay and friable particles when determined, shall not exceed 1% for any individual sieve size fraction. The total sulfate content as SO3 of the material shall not exceed 1% and the total soluble salts shall not exceed 2%. When used as road base, CBR at 95% max. Dry density should be minimum 80%.