Difference between revisions of "OPSS aggregates"
Jump to navigation
Jump to search
Jenny Hill (talk | contribs) m |
Jenny Hill (talk | contribs) m |
||
Line 1: | Line 1: | ||
Of the standard granular materials in the standard OPSS.MUNI 1010 only '''Granular O''' is recommended as a substitute for [[reservoir aggregate| clear stone]]. | Of the standard granular materials in the standard OPSS.MUNI 1010 only '''Granular O''' is recommended as a substitute for [[reservoir aggregate| clear stone]]. | ||
{{Textbox|1= Where Granular O is substituted for clear stone in underground reservoir structures, the void ratio used in design calculations shall be 0.3 unless laboratory testing proves otherwise.}} | {{Textbox|1= Where Granular O is substituted for clear stone in underground reservoir structures, the void ratio used in design calculations shall be 0.3 unless laboratory testing proves otherwise.}} | ||
+ | Examples include [[Underdrains]], [[infiltration trenches]], [[permeable paving]], [[infiltration chambers]], [[exfiltration trenches]]. | ||
+ | |||
{| class="wikitable" | {| class="wikitable" |
Revision as of 18:41, 18 March 2018
Of the standard granular materials in the standard OPSS.MUNI 1010 only Granular O is recommended as a substitute for clear stone.
Where Granular O is substituted for clear stone in underground reservoir structures, the void ratio used in design calculations shall be 0.3 unless laboratory testing proves otherwise.
Examples include Underdrains, infiltration trenches, permeable paving, infiltration chambers, exfiltration trenches.
Sieve size (mm) | A | B I | B II | B III | M | O | SSM | |||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
High | Low | High | Low | High | Low | High | Low | High | Low | High | Low | High | Low | |
150 | 100 | 100 | 100 | 100 | 100 | 100 | ||||||||
106 | 100 | 100 | ||||||||||||
37.5 | 100 | 100 | ||||||||||||
26.5 | 100 | 100 | 50 | 100 | 50 | 100 | 50 | 100 | 95 | 100 | 50 | 100 | ||
19 | 85 | 100 | 100 | 100 | 80 | 95 | ||||||||
13.2 | 65 | 90 | 75 | 95 | 60 | 80 | ||||||||
9.5 | 50 | 73 | 32 | 100 | 55 | 80 | 50 | 70 | ||||||
4.75 | 35 | 55 | 20 | 100 | 20 | 55 | 20 | 90 | 35 | 55 | 20 | 45 | 20 | 100 |
1.18 | 15 | 40 | 10 | 100 | 10 | 40 | 10 | 60 | 15 | 40 | 0 | 15 | 10 | 100 |
0.3 | 5 | 22 | 2 | 65 | 5 | 22 | 2 | 35 | 5 | 22 | 5 | 95 | ||
0.15 | 15 | 2 | 65 | |||||||||||
0.075 | 2 | 8 | 0 | 8 | 0 | 10 | 0 | 8 | 2 | 8 | 0 | 5 | 0 | 25 |
d60 | 13 | 6 | 35 | 0.25 | 25 | 6 | 40 | 1.2 | 10 | 5 | 15 | 7 | 35 | 0.15 |
d10 | 0.7 | 0.1 | 1 | 0.08 | 1.2 | 0.075 | 1.2 | 0.085 | 0.6 | 0.09 | 2.5 | 0.3 | 1.2 | NN |
Content Uniformity | 19 | 60 | 35 | 3 | 21 | 80 | 33 | 14 | 17 | 56 | 6 | 23 | 29 | |
Void ratio (Vukovic) | 0.26 | 0.26 | 0.26 | 0.40 | 0.26 | 0.26 | 0.26 | 0.27 | 0.27 | 0.26 | 0.34 | 0.26 | 0.26 | |
Mean void ratio (Vukovic) | 0.26 | 0.33 | 0.26 | 0.26 | 0.26 | 0.3 | 0.26 | |||||||
K(Hazen)(mm/hr) | 1764 | 36 | 3600 | 23.04 | 5184 | 20.25 | 5184 | 26.01 | 1296 | 29.16 | 22500 | 324 | 5184 | NN |
Mean K(hazen)(mm/hr) | 900 | 1812 | 2602 | 2605 | 663 | 11412 | NN |
Void ratios were calculated based on the coefficient of uniformity (CU)[2][3][4]: Where coefficient of uniformity is the ratio of the 60th and 10th percentile grain sizes:
Permeability (K) was estimated from the 10th percentile grain size using the Hazen formula.
- ↑ OPSS. (2013). Material Specficiation for Aggregates - Base, Subbase, Select Subgrade, and Backfill Material. Retrieved from http://www.raqsb.mto.gov.on.ca/techpubs/ops.nsf/0/0b9aa4d966cac4f9852580820062909e/$FILE/OPSS.MUNI%201010%20Nov%2013.pdf
- ↑ Vuković, Milan and Soro, Andjelko Determination of hydraulic conductivity of porous media from grain-size composition. Water Resources Publications, Littleton, Colo, 1992.
- ↑ Odong, J. (2007). Evaluation of Empirical Formulae for Determination of Hydraulic Conductivity based on Grain-Size Analysis. Journal of American Science, 3(3). Retrieved from http://www.jofamericanscience.org/journals/am-sci/0303/10-0284-Odong-Evaluation-am.pdf
- ↑ Zhang, S. (2017). Relationship between Particle Size Distribution and Porosity in Dump Leaching. the University of British Columbia. Retrieved from https://open.library.ubc.ca/collections/ubctheses/24/items/1.0357233