Evaluation of binder aging and its influence in aging of hot mix asphalt concrete : literature review and experimental design.
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2009-02-01
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Alternative Title:Project title: Evaluation of binder aging and its influence in aging of hot mix asphalt concrete
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Edition:Technical report; Sept. 2007-June 2008.
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Abstract:Binder oxidation in pavements and its impact on pavement performance has been addressed by ; numerous laboratory studies of binder oxidation chemistry, reaction kinetics, and hardening and its impact on ; mixture fatigue. Studies also have included some work on binder oxidation and hardening in pavements and ; the effectiveness of maintenance treatments. Yet more such studies are needed to better understand the ; fundamentals of pavement performance as a function of climate and pavement parameters. ; Based on these reports in the literature, an experimental design has been developed to meet three ; objectives and to provide four products. The objectives are: 1) to develop and calibrate a laboratory test to ; assess binder aging during the production process and during the field service of the pavement; 2) to ; incorporate aging for use in a HMA mix design system to produce mixtures that provide adequate resistance ; to fatigue cracking, including guidelines to optimize resistance of HMA to aging; and 3) to evaluate the use ; of maintenance treatments to reduce the aging of asphalt pavements starting at early ages. The products: 1) a ; new test procedure to characterize binder aging, and predict service life for different applications; 2) an ; HMA mix design component that incorporates aging and its effect on resistance to fatigue cracking; 3) ; guidelines for optimizing HMA mixture resistance to aging; and 4) guidelines for the best maintenance ; treatments to reduce the aging of binders. ; The experimental design includes measurements of binder oxidation and hardening at various stages ; of binder service, fundamental studies of binder oxidation and hardening kinetics, developing a transport ; model of binder oxidation in pavements, measurements of field oxidation and hardening rates, measurements ; of mixture fatigue decline as a function of binder oxidative hardening in both the field and laboratory, and ; measurements of maintenance treatment effectiveness at retarding binder oxidative hardening.
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Main Document Checksum:urn:sha256:23885142e9a6c3aad5d55763e9971ce947ee8afdae3eabd21ebc901de364f338