详情

Relating Asphalt Binder Fatigue Properties to Asphalt Mixture Fatigue Performance

项目名称：	Relating Asphalt Binder Fatigue Properties to Asphalt Mixture Fatigue Performance
摘要：	Many pavement engineers and researchers believe that the current Superpave asphalt binder specifications do not adequately predict the contribution of binder properties to asphalt mixture fatigue performance. However, at present there is not a clear alternative method to measure the fatigue performance of asphalt binders and their contribution to mixture fatigue performance. It is widely accepted that the primary factor affecting the fatigue performance of asphalt pavements is structural design: the thickness of the various layers composing the pavement system. However, other factors, including the binder content, binder aging, and the chemical and physical characteristics of the asphalt binders used in the asphalt pavement layers, can significantly affect fatigue performance. If the properties that influence binder fatigue can be identified, characterized, and specified effectively, it may be possible to specify a binder that can improve the fatigue properties of the mixture. A more effective binder specification requires one or more specification tests that do in fact relate to fatigue performance. Research is needed to develop such measures of binder fatigue properties that are indicators of asphalt mixture performance The objectives of this research were to: (1) Determine asphalt binder properties that are significant indicators of the fatigue performance of asphalt mixtures. (2) Identify or develop a practical, implementable binder test (or tests) to measure properties that are significant indicators of mixture fatigue performance for use in a performance-related binder purchase specification such as AASHTO M 320 and M 332. (3) Propose necessary changes to existing AASHTO specifications to incorporate the identified binder properties and their specification limits. (4) Validate the binder fatigue properties, test(s), and changes to existing and/or proposed AASHTO test methods and specifications with data from field projects, accelerated loading facilities, or both, supplemented, as necessary, with data from additional laboratory-prepared specimens.
状态：	Completed
资金：	1000000
资助组织：	National Cooperative Highway Research Program
项目负责人：	Harrigan, Edward T
执行机构：	Advanced Asphalt Technologies, LLC
主要研究人员：	Christensen, Donald
开始时间：	20150420
预计完成日期：	20190630
实际结束时间：	20190630