Difference between revisions of "Properties of permeable pavement"
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<th>Pervious concrete</th> | <th>Pervious concrete</th> | ||
<th>Porous asphalt</th> | <th>Porous asphalt</th> | ||
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| − | <td width="25%">Typical pavement surface thickness<sup>1</sup></td> | + | <td width="25%" bgcolor="blue">Typical pavement surface thickness<sup>1</sup></td> |
<td width="25%">5 to 8 inches</td> | <td width="25%">5 to 8 inches</td> | ||
<td width="25%">3 to 4 inches (thicker for high wheel load applications)</td> | <td width="25%">3 to 4 inches (thicker for high wheel load applications)</td> | ||
Revision as of 22:28, 6 December 2012
Properties of permeable pavements. (Link to this table)
| 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 inches1 |
| Bedding layer1,6 | None | 1 in. AASHTO No. 57 stone | 2 inches of AASHTO No. 8 stone (MnDOT 3127 FA-3) |
| Reservoir layer2,6 | AASHTO No. 57 stone or per hydraulic design | AASHTO No. 2, 3, or 5 stone | 4 inches of AASHTO No. 57 stone over No. 2, 3 or 4 stone |
| Construction properties |
|
|
|
| Installed surfacing cost3 | $3 to $4/square foot | $2/square foot | $3 to $4/square foot |
| Minimum batch size | |||
| Longevity4 | |||
| Overflow | |||
| Runoff temperature reduction | |||
| Surface colors/texture | Range of light colors and textures | Black or dark grey colors | Wide range of colors, textures and patterns |
| Load bearing capacity5 | |||
| Surface cleaning7 | Periodic vacuuming; replace jointing stones if completely clogged and uncleanable | ||
| Other issues |
|
|
Avoid winter sanding |
| Design reference | ACI Report 522-2010 | Hansen 2008NAPA | Smith 2011 ICPI |
- 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