Crumb Rubber Modifier (CRM) in Asphalt Pavements
Author: Oregon State University
Publisher:
Published: 1994
Total Pages: 64
ISBN-13:
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Author: Oregon State University
Publisher:
Published: 1994
Total Pages: 64
ISBN-13:
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Publisher:
Published: 1995
Total Pages: 152
ISBN-13:
DOWNLOAD EBOOKHighway agencies have been evaluating crumb rubber modifier (CRM) in hot mix asphalt (HMA) since the 1970s. Three agencies, Arizona, California, and Florida, currently use CRM in HMA at levels that would approach or exceed the mandate in Section 1038 of the Intermodal Surface Transportation Efficiency Act of 1991. This report documents the use of CRM in HMA in these three States. In particular, it addresses issues including thickness design, materials and mix design, construction procedure, including quality control, and pavement performance. The report also addresses the following questions: (1) What processes are used?, (2) Why are they used?, and (3) How are the products performing?
Author:
Publisher:
Published: 1993
Total Pages: 302
ISBN-13:
DOWNLOAD EBOOKSection 1038 of the Intermodal Surface Transportation Efficiency Act of 1991 (ISTEA) contains provisions for each State to begin incorporating scrap tire rubber into their asphalt paving materials. A workshop was developed through the cooperation of highway agencies and the asphalt industry to discuss present procedures and practices for designing and constructing asphalt pavements which incorporate scrap tire rubber (crumb rubber modifier). These workshop notes were prepared from the proceedings of the 13 workshop sessions.
Author:
Publisher:
Published: 1992
Total Pages: 128
ISBN-13:
DOWNLOAD EBOOKThis document is a comprehensive overview of the terminology, processes, products, and applications of crumb rubber modifier (CRM) technology. This technology includes any use of scrap tire rubber in asphalt paving materials. In general, CRM technology can be divided into two categories--the wet process and the dry process. When CRM is incorporated into an asphalt paving material, it will modify the properties of the binder (asphalt rubber) and/or act as a rubber aggregate (rubber modified hot mix asphalt). The five concepts for using CRM discussed in the report are McDonald, PlusRide, generic dry, chunk rubber asphalt concrete, and continuous blending asphalt rubber. An experimental work plan for monitoring performance and a stack emission testing program are also included.
Author: Oregon State University. Transportation Research Institute
Publisher:
Published: 1996
Total Pages: 88
ISBN-13:
DOWNLOAD EBOOKThis report compiles the experience of various highway agencies with crumb rubber modifier in hot-mix asphalt (CRM-HMA) and provides a set of general guidelines for the most effective use of these mixes in structural and functional rehabilitation of existing pavements. Uses of CRM-HMA in new pavements is also described. The report reviews the existing thickness design procedures and discusses their applicability to CRM-HMA. An interim design methodology for CRM-HMA overlays is proposed. A flow diagram of the design methodology and a number of design examples are included.
Author:
Publisher:
Published: 1994
Total Pages: 36
ISBN-13:
DOWNLOAD EBOOKAuthor: Khaled Saeed
Publisher: LAP Lambert Academic Publishing
Published: 2014-02
Total Pages: 108
ISBN-13: 9783659508066
DOWNLOAD EBOOKDisposal of waste tires has been known as a serious environmental problem. Since burying tires in landfills is not an easy solution either, highway engineers around the world have tried to incorporate scrap tire rubber in asphalt pavements as a modifier. This book investigate the use of Crumb Rubber Modifier (CRM) as a waste material in modifying the performance of the asphalt concrete mixtures. HMA mixtures characterization in terms of fatigue cracking and rutting resistance was analyzed and evaluated to determine the effects of the crumb rubber on the mixtures' performance. In addition, studying the effect of various environmental effects such as temperature, aging and moisture damage on the mechanical properties of the asphalt concrete mixtures. Several tests were used such as indirect tensile strength, indirect tensile fatigue and static creep test.
Author: Jon A. Epps
Publisher: Transportation Research Board
Published: 1994
Total Pages: 172
ISBN-13: 9780309053235
DOWNLOAD EBOOKThis synthesis on the use of recycled rubber tires in highways will be of interest to administrators and policy-makers; pavement, materials, geotechnical, environmental, and traffic operations engineers; and research engineers involved with highway design and construction issues. Information is provided on the uses of rubber tires in asphalt paving materials as well as other uses, such as on fills and embankments, for erosion control and on railroad grade crossings. Specifically, information is included which identifies the agencies using or implementing applications for recycled rubber tires and defines the design parameters, technical and construction limitations, performance, costs, benefits, environmental limitations, specifications, and availability. This synthesis of information defines the use of recycled rubber tires in highways and is based on a review of nearly 500 references and on information recorded from state highway agency responses to a 1991 survey of practice. Updates are included for as much of the state practice information possible through 1993. The use of scrap tires for highway applications is dynamic with regard to policy and technical issues. Therefore, the reader should keep in mind that the information presented reflects the best available data at a particular time. The synthesis also identifies current research in the topic area, critical research needs, and legislative issues that affect application and use of recycled rubber tires.
Author: Magdy Amin Abdelrahman
Publisher:
Published: 1996
Total Pages: 510
ISBN-13:
DOWNLOAD EBOOKThis study characterizes the interaction of asphalt with Crumb Rubber Modifier (CRM) using performance testing as used by SHRP. The study provides an understanding of the property development as asphalt interacted with CRM. Two main types of activities are discussed in the paper: particle swelling and depolymerization. Two types of interactions are considered: a short-term interaction that explains the property development mechanism and a long-term interaction where the property stabilizes. The effect of CRM properties on the developed properties is discussed in details.
Author: Ssu-Wei Loh
Publisher:
Published: 2000
Total Pages: 220
ISBN-13:
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