By replacing the old concrete grinding, in which small particles can develop high strength than the particle sizes at ages 3 7 14 and 28 days in the range of 20 to 30 percent, with a value of 88.84 – 89.47 Reed/sq. cm, 107.78 – 109.06 Reed/sq. cm, 135.86 kg/sq cm 124.84 – and to 128.95 – 139.15 kg/sq. cm, respectively.
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