Concepts developed by the franklin institute under us epa grant 1972. The surface of a porous asphalt pavement is smooth enough to meet requirements of the americans with disabilities act ada. Field manual for crack sealing in asphalt pavements 0. An optimization model for design of asphalt pavements. The shelly company is active in the production of porous asphalt pavements in ohio. Most people parking on a porous asphalt parking lot will not notice or believe that it is porous.
Rutting in asphalt pavement under heavy load and high temperature zhang qisen1, chen yuliang2, li xuelian3 1professor and phd supervisor. The asphalt pavement technology program is an integrated national effort to improve the longterm performance and cost effectiveness of asphalt pavements. A porous asphalt pavement is constructed over a stone filled reservoir to collect and store storm water and to allow it to infiltrate into the soil between rainfalls figure 1. Porous asphalt pavement is an alternative technology that differs from traditional asphalt pavement designs, that the pavement permits. Porous asphalt is standard hotmix asphalt with reduced sand or fines and allows water to drain through it. A road surface or pavement is the durable surface material laid down on an area intended to sustain vehicular or foot traffic, such as a road or walkway. Porous asphalt asphalt pavement association of oregon.
Earlier this year, asphalt insider reported on a porous asphalt pavement project at disneyland resort in anaheim, calif. Porous asphalt is an innovative road surfacing technology, which allows water to enter into the asphalt mixes beyond its continuous air voids. Porous asphalt pavement next to impervious pavement. Porous asphalt pavements with stone reservoirs fhwa. In the natural environment, rainfall sinks into soil, filters through it, and eventually finds its way to streams, ponds, lakes, and underground aquifers. Within the past few years, recycled asphalt shingles ras has also become a viable additive to. A porous asphalt pavement differs from traditional asphalt pavement designs in that the structure permits fluids to pass freely through it, reducing or controlling the amount of runoff from the surrounding area. They conserve water, reduce runoff, promote infiltration which cleanses stormwater, replenish aquifers, and protect streams. Incorporation of recycled asphalt shingles in hotmixed. Porous asphalt is a developing in road surfacing technology. These porous asphalt layers consist of asphalt binder, aggregates, sands, and recycled materials and are much like a densegraded hot mix asphalt mixture. Pdf laboratory performance of porous asphalt pavement. S1 2360 hot mixed asphalt porous pavement the provisions of the attached combined 23602350 gyratorymarshall design specification of these special provisions is hereby modified as follows in order to use the porous pavement as part of providing for storm water treatment. Stormwater which passes through the pavement may completely.
These pavements, used mostly for parking lots, allow water to drain through the pavement surface into a stone recharge bed. Permeable pavement is a method of paving that allows stormwater to seep into the ground as it falls rather than running off into storm drains, waterways and eventually the chesapeake bay. Porous asphalt pavement, on the other hand, is a type of type porous pavement structure specifically designed to allow rainfall and runoff to flow into and through the pavement structure. All seven modifiers were included in hot mix asphalt mixtures placed on one project on i465 in 1990.
When the pavement deflects or moves, it absorbs a portion of the vehicle energy that otherwise would be available to propel the vehicle forward. History of porous asphalt pavements porous asphalt mixes developed in 1930s and 1940s by state dots using mixes to reduce runoff in 1970s geotextiles. The second sentence of the first paragraph of section 504. Basics of durable asphalt pavements national asphalt pavement association webinar.
The built environment, by way of contrast, seals the surface. Porous pavement is a waterpermeable structural groundcover that. Unhsc design specifications for porous asphalt pavement and. The aim of this study is to recharge ground water to underplaying aquifers and reduce risk of flood condition. Number ec188 october 2014 application of reclaimed asphalt pavement and recycled asphalt shingles in hotmix asphalt national and international. Two control sections using ac20 were also constructed on the same project. With proper design and installation, porous asphalt pavements can provide a cost. Yield thickness smoothness flexible pavements of ohio. This project is a laboratory and field investigation of the performance of seven asphalt additives to control rutting and cracking. The rap from a single layer typically has uniform properties rap gradation, aggregate gradation, asphalt content, and asphalt characterisrecycling hot mix asphalt pavements figure 1 milling machine. Ats construction testing an asphalt porous pavement parking lot at the kentucky horse park in lexington, kentucky. Presentation to the mystic river steering committees municipal subcommittee on november 15, 2012. Thornton, research assistant school of mechanical engineering jorge gomez dominguez, visiting professor school of civil engineering. Porous asphalt pavement faqs flexible pavements of ohio.
Rainwater and snowmelt become runoff which may contribute to flooding. This specification is intended to be used for porous asphalt pavement in parking lot applications. Number ec188 october 2014 transportation research board. Porous asphalt pavements california coastal commission. Benefits and uses porous asphalt can be used in replace of traditional stormwater management measures given the proper conditions. Rutting in asphalt pavement under heavy load and high. Blacktop, also referred to as asphalt concrete, is a mixture of sand, stone, and gravel used in the construction of roads and pavements. Pdf rain water falling on the bituminous surfaces of parking lots, internal roads of various institutions etc. Alternative binders for sustainable asphalt pavements papers from a workshop january 22, 2012 washington, d. Porous asphalt pavements offer an alternative technology for stormwater management. Managed by the federal highway administration through partnerships with state highway agencies, industry and academia, the programs primary goals are to reduce congestion, improve safety. Meets lines shall be sealed while the new asphalt concrete is still warm by painting with special tack coat ste1 asphalt and immediately covering the asphalt paint strip with clean, dry paving sand meeting the requirements of section 903. Porous asphalt pavement refers to the compacted mix of modified asphalt, aggregate, and additives. Unhsc design specifications for porous asphalt pavement.
Preparation of sub grade to proper grade for base course, including compaction, is specified in section 31 00 00 earthwork. The procedure is based on the identification and measurement of visible distress at the pavement surface. Porous asphalt designed so that after laying and compacting, they form a surface with a voids more than 20 percent. Pavement performance can be largely attributed to the care given in designing and preparing its foundation, which is comprised of the subgrade and base layers. Porous pavement offers the potential to collect andor slow the rate of runoff from other impervious surfaces. In this paper we present a method for automated pothole detection in asphalt pavement images. Asphalt porous pavement is a green application that allows storm water to. Pavement condition report, indianapolishendricks county airport 4 1. Porous asphalt pavement is a paved surface and subbase comprised of asphalt, gravel, and stone, formed in a manner resulting in a permeable surface. Alternative binders for sustainable asphalt pavements. 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 1 2003. The various layers, called courses, have the potential for stormwater detention. Porous asphalt pavements allow for land development plans that are more thoughtful, harmonious with natural processes, and sustainable.
Design and contruction of a porous asphalt stormwater bmp retrofit an epa education and outreach project author. Design and contruction of a porous asphalt stormwater bmp retrofit. Surface treatments of any kind that would tend to seal the pores in the pavement should not be used. Sponsored by characteristics of asphalt materials committee characteristics of nonasphalt components of asphalt paving mixtures committee transportation research board august 2012 transportation research board 500 fifth street, nw. Provided by the hawaii asphalt paving industry hapi, this is an informational resource on asphalt pavement, hot mix asphalt hma, and related subjects. Standard construction specifications division 40 asphalt surfacing revised 1108 section 40. The right choice for porous asphalt porous pavements. Porous asphalt over an aggregate storage bed will reduce stormwater runoff volume, rate, and pollutants. Unlike conventional pavements, porous asphalt pavements figure 1 are typically built over an uncompacted subgrade to maximize infiltration through the soil. Bituminous material shall be pg performance grade pg 6422.
Pavement cracking is an inevitable phenomenon that maintenance engineers. Mcdaniel, principal investigator north central superpave center william d. The water drains through the porous asphalt and into the stone. Qa inspector to oversee and document mix production. More in pavement guide interactive stevens way will be fixed form starting in may. A typical porous pavement has an opengraded surface over an underlying stone recharge bed. History of porous asphalt pavements porous asphalt mixes developed in 1930s and 1940s by state dots using mixes to reduce runoff in 1970s geotextiles developed in 1979 current design process used since 1980. The final smoothness is still dependent, however, on the smoothness of the original pavement surface. Design and contruction of a porous asphalt stormwater bmp. Organization of this field manual accompanies that of the crack sealing in asphalt pavements training video also developed by ctr.
Porous asphalt pavements offer developers and planners a new tool in their toolbox for managing storm water. This research project was undertaken to address the responsible incorporation of recycled asphalt shingles ras into hma pavement mixtures to ensure environmental benefits are realized and pavement durability is retained or improved. The reduced fines leave stable air pockets in the asphalt. Cstev porous asphalt spec university of new hampshire. Base and subgrade layers must provide adequate and moisture resistant. Modified asphalt binder 35 feet of vertical separation is needed from seasonal high groundwater 4 thickness of. Porous pavement provides a stable loadbearing surface. It contains a general overview of all hma aspects and indepth information on recommendations and practices for hawaii. Asphalt pavement alliance im40 4 asphalt pavement alliance im40 5 over time. Design and contruction of a porous asphalt stormwater bmp epa.
A porous asphalt bmp is a bmp where the surface is composed of. Rehabilitation of a deteriorated porous asphalt surface will normally entail removing the deteriorated asphalt layer or layers to the depth necessary and repaving with new porous asphalt mixtures. Permeable pavement fact sheet information for howard. Guideline for asphalt pavement design in colorado developed by the colorado association of geotechnical engineers cage under the request and assistance from the colorado asphalt pavement association capa assistance from bob locander cdot sunday, march 28, 2010. This paper aims to propose an optimization model to determine the optimal configuration as well as the optimum thickness of different. In the past, gravel road surfaces, cobblestone and granite setts were extensively used, but these surfaces have mostly been replaced by asphalt or concrete laid on a compacted base course. While slightly coarser than standard asphalt, porous asphalt pavements are attractive and acceptable. Stormwater management functions of porous asphalt installations include water quality treatment, peak flow reduction, storm volume reduction via groundwater recharge, and increased hydrograph time lag.
Asphalt is a black, sticky substance that occurs naturally but can also be refined from crude oil. By limiting the amount of fines, the porous mixture allows for more air voids. The interconnected void space allows stormwater to flow through then enter a. Field evaluation of porous asphalt pavement final report sqdh 2004 3 hl 2004 6 by. The national asphalt pavement association, lanham, md. Incommensurate design and construction of pavements, in addition to the loss of the initial investment, would impose indirect costs to the road users and reduce road safety. Porous asphalt pavements flexible pavements of ohio. Us epa, region 1, office of environmental stewardship subject. Pavement uplift will occur along the sides of the rut.
Not only a lowmaintenance option for homes and businesses with drainage problems. A typical porous pavement has an opengraded surface over an underlying. Porous asphalt pavement wisconsin asphalt pavement association. Porous asphalt pavements are being used to reduce or eliminate storm water runoff from parking lots and other such facilities. Impervious surfaces such as roofs and pavements create runoff, so that dirt and debris are washed into streams and waterways. Cold milling asphalt pavement is the process of removing existing pavement from the roadway to the lines and dimensions shown on the plans or as directed by the consultant.