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Line 1: − <p>All aggregates should meet the following criteria:+ − <ul> − <li>Maximum wash loss of 0.5%</li> − <li>Minimum durability index of 35</li> − <li>Maximum abrasion of 10% for 100 revolutions and maximum of 50% for 500 revolutions</li> − </ul> − <p>Granular material for underdrains should be clear crushed 50 mm diameter stone graded in accordance with ASTM D 2940. The void space ratio shall be 0.4 .</p>
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