Difference between revisions of "Gravel"

Latest revision as of 16:43, 5 March 2018

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-<ul>
+#REDIRECT [[Aggregates]]
-<li>Granite is generally recommended over limestone for all drainage applications. Granite is both more chemically stable, and more resistant to crushing over time. </li>
-<li>Granular material for underdrains should be clear crushed 20 or 50 mm diameter stone graded in accordance with [https://www.astm.org/Standards/D2940.htm ASTM D 2940].</li>
-<li>The 20 mm clear crushed aggregate permits the use of an overlaid layer of high performance bedding (HPB) as a choker layer.</li>
-<li>The void space ratio should be > 0.35 (or > 35%)</li>
-</ul>
-All gravel 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>
-[[Category:materials]]