Effect of Crumb Rubber Modifier on Asphalt Concrete (Engineering)

1991年的《多式联运地面运输效率法》（ISTEA）规定了所有沥青中橡胶屑的最低利用率要求，如下表所示。1994年5% 1995年10% 1996年15% 1997年20%（此后每年）1993年3月战略公路研究计划（SHRP）的结论和立法在沥青路面应用中包含废轮胎橡胶的要求代表了一个独特的及时的机会，可以立即利用来自SHRP沥青研究计划的产品，以评估橡胶屑改性沥青混凝土的可能性能和经济可行性。​因此，本研究项目探讨了碎石改性剂在沥青混凝土中的应用。具体来说，Leahy博士将利用SHRP加速性能测试进行全面的实验室调查，以评估橡胶屑改性对沥青混凝土永久变形的潜在好处。在接待机构的互动活动包括：教授本科生和研究生课程；参加每月的研究讨论会；担任1名本科生和研究生的研究指导；举办研讨会，由三名女性做报告，她们都是专业工程师；为俄勒冈大学（University of Oregon）就读数学和科学专业的女性举办研讨会；协调女研究生参与本科指导项目。该项目进一步推进了VPW计划的目标，即(1)为女性提供在工程和NSF支持的科学学科中发展职业的机会；(2)通过为在工业、政府和学术机构工作的女性科学家和工程师提供更大的知名度，鼓励女性在科学和工程领域追求职业。通过鼓励妇女参与科学，这是对国家未来科学活力的宝贵投资。

The Intermodal Surface Transportation Efficiency Act (ISTEA) of 1991 mandates a minimum utilization requirement of crumb rubber for all asphalt placed as outlined in the schedule below. 1994 5% 1995 10% 1996 15% 1997 20% (and each year thereafter) The conclusion of the Strategic Highway Research Program (SHRP) in March 1993 and the legislative requirement for inclusion of scrap tire rubber in asphalt paving applications represent a unique timely opportunity for immediate utilization of products emanating from SHRP's asphalt research program to assess the likely performance and economic viability of crumb rubber modified asphalt concrete. Accordingly, this research project addresses the use of crumb modifier in asphalt concrete. Specifically, Dr. Leahy will carry out a comprehensive laboratory investigation utilizing the SHRP accelerated performance tests to evaluate the potential benefits crumb rubber modification may impart to asphalt concrete in terms of permanent deformation. Interactive activities at the host institution include: teaching an undergraduate and a graduate course; participating at monthly research colloquia; serving as research advisor to one undergraduate and graduate student; hosting a seminar with presentations from three women, all professional engineers; hosting a seminar for University of Oregon women enrolled in math and sciences; and coordinating participation of women graduate students in the undergraduate mentoring program. This project furthers VPW program objectives which are (1) to provide opportunities for women to advance their careers in engineering and in the disciplines of science supported by NSF and (2) to encourage women to pursue careers in science and engineering by providing greater visibility for women scientists and engineers employed in industry, government, and academic institutions. By encouraging the participation of women in science, it is a valuable investment in the Nation's future scientific vitality.