Difference between revisions of "Sand"

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

Latest revision as of 18:48, 15 September 2020

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 ASTM C33/C33M, or otherwise meet the gradation below.
Particle size distribution
Sieve 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

Mineral particles which are smaller than 2 mm, and which are free of appreciable quantities of clay and silt. Coarse sand usually designates sand grains with particle size between 0.2 and 0.02 mm.

Low Impact Development. A stormwater management strategy that seeks to mitigate the impacts of increased urban runoff and stormwater pollution by managing it as close to its source as possible. It comprises a set of site design approaches and small scale stormwater management practices that promote the use of natural systems for infiltration and evapotranspiration, and rainwater harvesting.

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