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Class 3 Fill (Desert Fine)

  Class 3 Fill (Desert Fine)

Class 3 fill is desert fill type material and shall be a selected, graded, hard granular material free from clay and deleterious substances. The total sulphate content as SO3 of the material shall not exceed 1% and the total soluble salts shall not exceed 2%.
The grading of the fill shall lie within the grading envelope given below when tested. Where the percentage passing the 0.075mm sieve is greater than 8%, the plasticity index shall not exceed 20%.