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CLASS-F FLY ASH of ASTM C618 Standard of below 34% ROS on 45 micron sieve CLASS-F FLY ASH of ASTM C618 Standard of below 20% ROS on 45 micron sieve & CLASS-F FLY ASH of BS 3892 PART 1 Standard of below 12% ROS on 45 micron sieve
