Difference between revisions of "Gravel"
Jump to navigation
Jump to search
Jenny Hill (talk | contribs) |
Jenny Hill (talk | contribs) |
||
| Line 5: | Line 5: | ||
<li>Maximum abrasion of 10% for 100 revolutions and maximum of 50% for 500 revolutions.</li> | <li>Maximum abrasion of 10% for 100 revolutions and maximum of 50% for 500 revolutions.</li> | ||
</ul></p> | </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> | |
| + | [[Category:materials]] | ||
Revision as of 19:33, 4 July 2017
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 shall be 0.4 .