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原文传递 Evaluation of Fatigue Crack Propagation in Plain and Reinforced Asphalt Concretes

题名：	Evaluation of Fatigue Crack Propagation in Plain and Reinforced Asphalt Concretes
正文语种：	中文
作者：	Aysar NAJ Zheng Chuanchao
作者单位：	Key Laboratory for Special rea of Highway Engineering of Ministry of Education , hang 'an University,Xi'an 710064
关键词：	道路工程沥青路面路面防裂玻璃纤维
摘要：	This paper contains an analysis of cracking propagation mechanism in flexible pavements. Several Anti cracking systems are proposed, glass fibers reinforcing materials is used .Two different reinforcing methodologies are applied; first: modification of the overlay characteristics by adding chopped glass fibers to the Hot Mixture Asphalt (HMA). Second: reinforcing asphalt overlay by glass gride. Theory of fracture mechanics FM has been employed to determine crack growth rates of the suggested anti - cracking overlay systems. Asphalt mixture designing tests, three paints bending tests and fatigue crack propagation tests were carried out. The Critical Stress Intensity Factors Kic ate determined for plain and reinforced asphalt concrete. Depending on the fatigue crack propagation, the crack growth rate is determined for each type of anti - cracking systems, the cracking process is also analyzed. One of the significant points in this study is the attempt to give better understanding of the crack propagation for multilayer asphaltic overlay or what are suggested herein to call Composite Structure Anti Craddng Overlay System. The results indicate that the reinforcing materials improve anticracking characteristics of the asphalt concrete. Composite structure anti - cracking overlay gives a good solution for reflective cracking phenomenon over old cracked pavements.
会议日期：	20050625
会议举办地点：	西安
会议名称：	第五届交通运输领域国际学术会议
出版日期：	2005-06-25
母体文献：	第五届交通运输领域国际学术会议论文集
分类号：	U416.217 U414.75