详情

Development of a Self-healing and Rejuvenating Mechanisms for Asphalt Mixtures Containing Recycled Asphalt Shingles

项目名称：	Development of a Self-healing and Rejuvenating Mechanisms for Asphalt Mixtures Containing Recycled Asphalt Shingles
摘要：	The objective of this project is to test the hypothesis that hollow-fibers containing a rejuvenator product can improve both self-healing, rejuvenation and mechanical properties of asphalt mixtures. The hollow-fibers containing a rejuvenator product will be synthesized with a sodium-alginate polymer as the encapsulating material. The encapsulated rejuvenator product will be a commercially-available synthetic oil. An optimization procedure will be performed by varying parameters such as the percentage of emulsifier, percentage of plasticizer, and ratio rejuvenator to polymer used. The thermal stability and tensile strength of the developed fibers will be tested to determine their resistance to asphalt production processes. The optimum fiber percentage will be assessed based on the performance of asphalt blends with different percentages of fibers on a Multiple Stress Creep Recovery (MSCR) test and based on the performance of asphalt mixtures with different percentages of fibers on a fatigue cracking resistance test. Performance Grading (PG) will be performed on different asphalt blends containing the optimum amount of fibers and/or recycled materials to evaluate the effects of the fibers on the rheological properties of the binder. Similarly, asphalt mixtures containing the optimum amount of fibers and/or recycled materials will be evaluated against low-temperature cracking and rutting susceptibility in a controlled laboratory environment. The healing efficiency of asphalt mixtures containing fibers in two environmental conditions will be quantified by measuring the crack width before healing (day 0) and at different healing periods. Finally, a relationship between undamaged, damaged, and healed stiffness will be evaluated to determine the stiffness recovery at the end of the healing period.
状态：	Completed
资金：	91710
资助组织：	Office of the Assistant Secretary for Research and Technology
管理组织：	Transportation Consortium of South-Central States
项目负责人：	Hassan, Marwa M
执行机构：	Louisiana State University and A&M College
主要研究人员：	Hassan, Marwa M
开始时间：	20170508
预计完成日期：	20181108
实际结束时间：	20181108