详情

Models for Predicting Reflection Cracking of Hot-Mix Asphalt Overlays

项目名称：	Models for Predicting Reflection Cracking of Hot-Mix Asphalt Overlays
摘要：	Reflection cracking is one of the primary forms of distress in hot-mix asphalt (HMA) overlays of flexible and rigid pavements. In addition to affecting ride quality, the penetration of water and foreign debris into these cracks accelerates the deterioration of the overlay and the underlying pavement, thus reducing service life. The basic mechanism causing reflection cracking is strain concentration in the overlay due to movement in the existing pavement in the vicinity of joints and cracks. This movement may be induced by bending or shear action resulting from traffic loads or temperature changes and is influenced by traffic volume and characteristics, daily and seasonal temperature variations, and other factors (e.g., pavement structure and condition, HMA mixture properties, the degree of load transfer at joints and cracks). Preliminary models for predicting the extent and severity of reflection cracking in HMA overlays have been developed; however, only limited research has been performed to evaluate and validate these models. Research is needed to address the issues associated with reflection cracking and to develop mechanistic-based models for use in mechanistic-empirical procedures for the analysis and design of HMA overlays. This research will help account for the effects of reflection cracking on performance thus improving the analysis and design of HMA overlays of flexible and rigid pavements. The objective of the research is to identify or develop mechanistic-based models for predicting reflection cracking in HMA overlays of flexible and rigid pavements and associated computational software for use in mechanistic-empirical procedures for overlay design and analysis.
状态：	Completed
资金：	500000.00
资助组织：	Federal Highway Administration<==>American Association of State Highway and Transportation Officials (AASHTO)<==>National Cooperative Highway Research Program
项目负责人：	Hanna, Amir N
执行机构：	Texas A&M Research Foundation, College Station
开始时间：	20050203
实际结束时间：	20100226
主题领域：	Highways；Pavements；I30: Materials