Difference between revisions of "Gravel"

From LID SWM Planning and Design Guide
Jump to navigation Jump to search
Line 1: Line 1:
All aggregates should meet the following criteria:
<ul>
*Maximum wash loss of 0.5%,
<li>Granular material for underdrains should be clear crushed 50 mm diameter stone graded in accordance with [https://www.astm.org/Standards/D2940.htm| ASTM D 2940].</li>
*Minimum durability index of 35,
<li>The void space ratio should be > 0.35 (or > 35%)</li>
*Maximum abrasion of 10% for 100 revolutions and maximum of 50% for 500 revolutions.
</ul>
 
All gravel should meet the following criteria:
*Granular material for underdrains should be clear crushed 50 mm diameter stone graded in accordance with ASTM D 2940.
<ul>
*The void space ratio should be 0.4 (or 40%)
<li>Maximum wash loss of 0.5%</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>Minimum durability index of 35</li>
 
<li>Maximum abrasion of 10% for 100 revolutions and maximum of 50% for 500 revolutions</li>
</ul>
{{:feedback}}
[[Category:materials]]
[[Category:materials]]

Revision as of 14:51, 28 July 2017

  • 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 > 0.35 (or > 35%)

All gravel 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
  1. REDIRECT Special:ArticleFeedbackv5