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原文传递 Asphalt Rheology and Strengthening Through Polymer Binders

题名：	Asphalt Rheology and Strengthening Through Polymer Binders
作者：	Attoch-Okine, N.; Cook, P.; Martey, E.; Boyce, T.; Alshali, A.
关键词：	Asphalt Rheology##Polymers##Binders (materials)##Bridges (Structural)##Pavements##Strengthening##Stiffness method##PERFORMANCE ( HUMAN)##Asphalt pavement mixtures##Reclaimed asphalt pavement##Tension cracking##Sustainable benefits##Fatigue cracking life##Hurricane Sandy##
摘要：	This term paper investigates the influences of polymer modifications to asphalt rheology as compared to conventional asphalt pavement sections. The addition of 2% to 3% of polymers into the wearing and base courses of asphalt (flexible) pavements have been known to enhance the engineering characteristics of traditional asphalt as a binder which offers longer life expectancy and increased capacity, increased resistance to fatigue cracking, increased resistance to rutting (permanent deformation), improved thermal-stiffness performance at high and low extreme temperatures, increased resistance to tension cracking, increased resistance to stripping, and reduce binder drain down. Polymers are classified in this paper into their major respective categories with the most common types presented and described in detail. Challenges related to the usage, rheology, and practical implementation of polymer modified asphalt are discussed. Standardized and non-standardized tests and experiments related to the physical and rheological characterization of asphalts and polymer-modified are also presented. Recent research has focused on the sustainability concepts for the application of polymer modified asphalt for high-recycled asphalt mixtures to achieve similar or better engineering characteristics as compared to conventional asphalt pavement mixtures. The sustainable benefits of using high-reclaimed asphalt pavement with the addition of polymer and rejuvenator modifications include reduced landfill / stockpile dependence, reduced greenhouse gas emissions from less required virgin binder from oil barrels, and possible economic benefits depending on the true-costs of the project. To achieve comparable or better rheological properties for high-recycled asphalt pavement high-polymer modified asphalt can be used with between 7% and 8% polymer additions. Furthermore, high-polymer modified asphalt is shown to be applicable to applications such as highly traveled highways, when thinner layers of pav
总页数：	27
报告类型：	科技报告