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Line 1: − 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> − ====Underdrains==== − <ul> − <li>Granular material for underdrains should be clear crushed 50 mm diameter stone graded in accordance with ASTM D 2940. </li> − <li>The void space ratio shall be 0.4 .</li> − <li>A 100 mm layer of smaller grade pea gravel should be laid over the clear stone to reduce the chance of puncture damage to geotextile fabric. </li> − </ul> − − − − −
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#REDIRECT [[Aggregates]]
[[Category:materials]]