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Line 1: − Clean, washed, sand, free of toxic materials+ − Coarse concrete sand, ASTM C33/C33M Fine Aggregate, with a Fines Modulus Index between 2.8 and 3.2.+ − Sand shall be clean, sharp, free of limestone, shale and slate particles. Manufactured coarse sand shall not be permitted. (Jen: WHY?)+ − pH: ≤ 7.0+ + + + + + + + + + + + + + + + + + + + + + + + + − <table class = "table table-striped table-responsive"> − <caption><strong>Particle size distribution</strong></caption> − <tr class ='success'><th>Sieve</th><th>Percent passing</th></tr> − <tr><td>9.5 mm</td><td>100</td></tr> − <tr><td>4.75 mm (No.4)</td><td>95-100</td></tr> − <tr><td>2.36 mm (No.8)</td><td>80-100</td></tr> − <tr><td>1.18 mm (No.16)</td><td>50-85</td></tr> − <tr><td>0.60 mm (No.30)</td><td>25-85</td></tr> − <tr><td>0.30 mm (No.50)</td><td>5-30</td></tr> − <tr><td>0.15 mm (No.100)</td><td>0-10</td></tr> − <tr><td>0.75 mm (No.200)</td><td>≤ 3</td></tr> − </table> − ----
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[[File:PSD sand.jpg|thumb|Particle size distribution graph for ASTM C33 sand, as described in table]]
*Coarse sand for LID construction shall be washed clean and free of toxic materials.
*The pH of the sand shall be ≤ 7.0.
*The coarse sand shall have a fineness modulus index between 2.8 and 3.1 according to [https://www.astm.org/Standards/C33 ASTM C33/C33M], or otherwise meet the gradation below.
{|class="wikitable"
|+ Particle size distribution
|-
!style="background: darkcyan; color: white"|Sieve
!style="background: darkcyan; color: white"|Percent passing
|-
|9.5 mm||100
|-
|4.75 mm (No.4)||95 - 100
|-
|2.36 mm (No.8)||80 - 100
|-
|1.18 mm (No.16)||50 - 85
|-
|0.60 mm (No.30)||25 - 50
|-
|0.30 mm (No.50)||5 - 30
|-
|0.15 mm (No.100)||0 - 10
|-
|0.075 mm (No.200)||≤ 3
|}
[[category: materials]]
[[category: materials]]