8,255
edits
Changes
Jump to navigation
Jump to search
Line 1:
Line 1: − <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> + + + − − {{:feedback}}
no edit summary
All aggregates should meet the following criteria:
All aggregates should meet the following criteria:
*Maximum wash loss of 0.5%,
*Minimum durability index of 35,
*Maximum abrasion of 10% for 100 revolutions and maximum of 50% for 500 revolutions.
*Granular material for underdrains should be clear crushed 50 mm diameter stone graded in accordance with ASTM D 2940.
*The void space ratio should be 0.4 (or 40%)
*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.
[[Category:materials]]
[[Category:materials]]