Changes

<p>All aggregates should meet the following criteria:

<p>All aggregates should meet the following criteria:

<ul>

<ul>

<li>Maximum wash loss of 0.5%</li>

<li>Maximum wash loss of 0.5%.</li>

<li>Minimum durability index of 35</li>

<li>Minimum durability index of 35.</li>

<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>

<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>

<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>