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Studies

Listed below are recent studies about asphalt. Click on the links to see the complete study in PDF format. To view PDFs, you will need the free Adobe Acrobat Reader. If you do not have the reader, you may download it from Adobe.

EPA and the Federal Highway Administration (FHWA)
A Study of the Use of Recycled Paving Material, 1993
Demonstrated that asphalt pavement is America's number one recycled product.
[View PDF]

American Association of State Highway and Transportation Officials (AASHTO) and the Federal Highway Administration (FHWA)
The National Cooperative Highway Research Program (NCHRP)
The research results showed that HMA pavements are very stable and the substances in them do not leach into the environment in quantities that might be harmful.

Florida Center for Solid and Hazardous Waste Management, State University System of Florida
Leaching Characteristics of Asphalt Road Waste
An investigation of leaching of pollutants from recycled asphalt pavement (RAP) indicated that RAP poses minimal risk to groundwater as a result of pollutant leaching under normal land disposal scenarios. Additionally, leaching tests indicated that in most cases RAP would pose minimal environmental risk when used as fill material.
[View PDF]

U.S. Environmental Protection Agency
National Emission Standards for Hazardous Air Pollutants
Two brief notices published in the Federal Register announced that HMA production facilities are not major sources of hazardous air pollutants.
[View PDF 1] [View PDF 2]



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