porous asphalt pavement design are: n Consider the location for porous pavements early in the site design process. n Soil infiltration rates of 0.1 to 10 inches/hour work best. n Minimum depth to bedrock or seasonal high water should be greater than two feet.

specification for porous asphalt pavement. It is intended also to provide design guidelines regarding what conditions are appropriate for this type of pavement. Specifically, this includes guidelines for the design of the porous asphalt pavement, a stone reservoir under the pavement, and inspection and maintenance requirements for

Pervious Pavement Design Guidance . Pervious pavement is designed primarily to promote stormwater infiltration and improve the quality of stormwater runoff. It is typically designed to capture rainfall on the pavement surface area, but may also accept run-on from adjacent impervious areas and other hardscapes (sidewalks), rooftops, or gutters.

Alternatives to traditional pavement on our paved surfaces can help reduce runoff by infiltrating rain water and melting snow. These alternative materials which include pervious asphalt, pervious concrete, interlocking pavers, and plastic grid pavers, allow rain and snowmelt to seep through the surface down to underlying layers of soil and gravel.

Porous Asphalt Pavement and Infiltration Beds Design Specifications Page-4 University of New Hampshire Stormwater Center – July 2007 PART 1 GENERAL 1.1 DESCRIPTION A. This specification is intended to be used for porous asphalt pavement in parking lot applications.

Porous Asphalt: The bedding layer for porous asphalt pavement consists of 1 to 2 inches of clean, washed ASTM D 448 No.57 stone. The filter course must be leveled and pressed (choked) into the reservoir base with at least four (4) passes of a 10-ton steel drum static roller.

Mix Design Class ½ HMA PG 70-22 Binder content shall be between 6.0% and 7.0% Void ratio of 16% to 25% Percent of two face fracture shall be greater than 90%. March 2015 Porous Asphalt -The Specs Washington Asphalt Paving Association 7 Sieve Size

Porous asphalt pavements can be installed as whole or in part with traditional impervious asphalt pavements. When installed in combination with impervious pavements or adja-cent to building roofs, porous asphalt can sufficiently contain and treat the additional runoff generated. Design of Porous Asphalt Pavements

Porous asphalt pavement refers to the compacted mix of modified asphalt, aggregate, and additives. C. The porous asphalt pavement specified herein is modified after the National Asphalt Pavement Association (NAPA) specification outlined in Design, Construction, and Maintenance Guide for Porous Asphalt Pavements, Information Series 131 (2003 ...

Porous Asphalt Pavement Mixtures Design Criteria Mix N design Air Voids @ N design PG Binder Content VCA mix 2 Draindown of Uncompacted Asphalt Mixtures, AASHTO T305, maximum Mixing and Compaction Temperature Range4 °F Top Course 50 20.0 5.5 % minimum Less than VCA drc 3 0.3 % 285°F - 325°F Binder

infiltration under the structure. (See Design Checklist.) Pervious pavement, also referred to as permeable pavement, contains pores or separation joints that allow water to flow through and seep into a base material (typically gravel or drain rock). Types of pervious pavement include porous asphalt …

1.2.3 Pervious Asphalt Pervious Asphalt is similar to conventional (impervious) asphalt except that less fine material is used in the mixture in order to provide drainage. Pervious Asphalt has a courser appearance than conventional asphalt. Advantages: While not as strong as conventional asphalt pavement, Pervious Asphalt offers sufficient

Porous Asphalt Pavement and Infiltration Beds Design Specifications Page-5 University of New Hampshire Stormwater Center –October 2009 PART 1 GENERAL 1.1 DESCRIPTION A. This specification is intended to be used for porous asphalt pavement in parking lot applications.

Porous asphalt pavements can be installed as whole or in part with traditional impervious asphalt pavements. When installed in combination with impervious pavements or adjacent to building roofs, porous asphalt can sufficiently contain and treat the additional runoff generated. Design of Porous Asphalt Pavements