Difference between revisions of "Sand"

From LID SWM Planning and Design Guide
Jump to navigation Jump to search
m
Line 1: Line 1:
[[File:PSD sand.png|thumb|Particle size distribution graph, as described in table]]
[[File:PSD sand.png|thumb|Particle size distribution graph, as described in table]]


*Coarse sand for LID construction shall be clean and free free of toxic materials.
*Coarse sand for LID construction shall be washed clean and free free of toxic materials.
*The pH of the sand shall be  ≤ 7.0. Manufactured sand from limestone or dolostone parent material is not acceptable.
*The pH of the sand shall be  ≤ 7.0.  
*Manufactured sand from limestone or dolostone parent material is not acceptable.
*Sand manufactured from crushed recycled glass is available locally, and is a viable alternative.  
*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.
*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.



Revision as of 19:14, 20 February 2018

Particle size distribution graph, as described in table
  • Coarse sand for LID construction shall be washed clean and free free of toxic materials.
  • The pH of the sand shall be ≤ 7.0.
  • Manufactured sand from limestone or dolostone parent material is not acceptable.
  • Sand manufactured from crushed recycled glass is available locally, and is a viable alternative.
  • 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