Difference between revisions of "Properties of permeable pavement"
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<th>Properties</th> | <th>Properties</th> | ||
<th>Pervious concrete</th> | <th>Pervious concrete</th> | ||
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<th>[[Acronyms|PICP]]</th> | <th>[[Acronyms|PICP]]</th> | ||
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<td width="25%">Typical pavement surface thickness<sup>1</sup></td> | <td width="25%">Typical pavement surface thickness<sup>1</sup></td> | ||
<td width="25%">5 to 8 inches</td> | <td width="25%">5 to 8 inches</td> | ||
Revision as of 20:58, 5 December 2012
Properties of permeable pavements. (Link to this table)
background-color: #bbbbbb| Properties | Pervious concrete | Porous asphalt | PICP |
|---|---|---|---|
| Typical pavement surface thickness1 | 5 to 8 inches | 3 to 4 inches (thicker for high wheel load applications) | 3 inches |
| Bedding layer1,6 | None | 1 in. No. 57 stone | 2 inches of No. 8 stone |
| Reservoir layer2,6 | No. 57 stone or per hydraulic design> | No. 2, 3, or 5 stone | 4 inches of No. 57 stone over No. 2, 3 or 4 stone |
| Construction properties | Cast in place, seven day cure, must be covered | Cast in place, 24 hour cure | No cure period; manual or mechanical installation of pre-manufactured units |
| Installed surfacing cost3 | $3 to $4/sf | $2/sf | $3 to $4/sf |
| Minimum batch size | None | None | None |
| Longevity4 | 20 to 30 years | 20 to 30 years | 20 to 30 years |
| Overflow | Catch basin or overflow edge | Catch basin or overflow edge | Catch basin or overflow edge |
| Runoff temperature reduction | Cooling at the reservoir layer | Cooling at the reservoir layer | Cooling at the reservoir layer |
| Surface colors/texture | Range of light colors and textures | Black or dark grey colors | Wide range of colors, textures and patterns |
| Load bearing capacity5 | Handles all vehicle loads with appropriate surface and base/subbase layer material and thickness design | Handles all vehicle loads with appropriate surface and base/subbase layer material and thickness design | Handles all vehicle loads with appropriate surface and base/subbase layer material and thickness design |
| Surface cleaning7 | Periodic vacuuming; replace if completely clogged and uncleanable | Periodic vacuuming; replace if completely clogged and uncleanable | Periodic vacuuming; replace jointing stones if completely clogged and uncleanable |
| Other issues | Avoid concentrated deicers and winter sanding | Avoid seal coating and winter sanding | Avoid winter sanding |
| Design reference | ACI Report 522-2010 | Hansen 2008 NAPA | Smith 2011 ICPI |
- 1. Thickness may vary depending on site and traffic conditions
- Reservoir storage may be augmented by corrugated metal pipes, plastic arch pipe or plastic lattice crates
- Supply and install minimum surface thickness only; minimum 30,000 sf with Minnesota 2012 prevailing labor wages. Does not include base reservoir, drainage appurtenances, engineering, or inspection
- Based on pavement being properly maintained. Resurfacing or rehabilitation may be needed after the indicated period
- Depends primarily on on-site geotechnical considerations and structural design computations
- ASTM D448 Standard Classification for Sizes of Aggregate for Road and Bridge Construction or ASASHTO M-43
- Periodic vacuuming frequency determined from inspection, intensity of use, and other potential sediment sources