The use of DMA to characterize the aging of asphalt binders : tech summary.

712203249PDFTech ReportFHWA/LA.07/461BindersDynamic testsField studiesRheologyMechanical analysisLouisianaLouisiana Transportation Research CenterDaly, William H.Negulescu, Ioan I.Mohammad, Louay N.Chiparus, IonelaLouisiana Transportation Research CenterLouisiana. Dept. of Transportation and DevelopmentUnited States. Federal Highway AdministrationLouisiana State University (Baton Rouge, La.). Dept. of Civil and Environmental EngineeringNTL-HIGHWAY/ROAD TRANSPORTATION-MaterialsNTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and PerformanceUS Transportation CollectionMost of U.S. southeastern states experience both hot and wet summer weather. Extremely high relative humidity and alow dew point maintain a continuous fi lm of water on Gulf Coast roads during the night and early morning hours. Shouldthe laboratory protocols for aging asphalt binders consider the vapors of water as components of the aging atmosphereas well as air (oxygen) exposure? It was the goal of the present investigation to address the potential infl uence of wateron the aging of road pavements containing polymer modifi ed asphalt cements (PMAC)