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Author : H. B. Takallou
Release : 1988
Genre : Asphalt-rubber
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis Development of Improved Mix and Construction Guidelines for Rubber Modified Asphalt Pavements by : H. B. Takallou
Download or read book Development of Improved Mix and Construction Guidelines for Rubber Modified Asphalt Pavements written by H. B. Takallou. This book was released on 1988. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Sekhar Rebala
Release : 1994
Genre : Asphalt-rubber
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis Short-term Guidelines to Improve Crumb Rubber Modified Asphalt Concrete Pavements by : Sekhar Rebala
Download or read book Short-term Guidelines to Improve Crumb Rubber Modified Asphalt Concrete Pavements written by Sekhar Rebala. This book was released on 1994. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jon A. Epps
Release : 1994
Genre : Technology & Engineering
Kind : eBook
Book Rating : 235/5 ( reviews)
Book Synopsis Uses of Recycled Rubber Tires in Highways by : Jon A. Epps
Download or read book Uses of Recycled Rubber Tires in Highways written by Jon A. Epps. This book was released on 1994. Available in PDF, EPUB and Kindle. Book excerpt: This 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 : United States. Congress. House. Committee on Appropriations. Subcommittee on Department of Transportation and Related Agencies Appropriations
Release : 1996
Genre : United States
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis Department of Transportation and Related Agencies Appropriations for 1997 by : United States. Congress. House. Committee on Appropriations. Subcommittee on Department of Transportation and Related Agencies Appropriations
Download or read book Department of Transportation and Related Agencies Appropriations for 1997 written by United States. Congress. House. Committee on Appropriations. Subcommittee on Department of Transportation and Related Agencies Appropriations. This book was released on 1996. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Hossein B. Takallou
Release : 1987
Genre : Asphalt-rubber
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis Evaluation of Mix Ingredients on the Performance of Rubber-modified Asphalt Mixtures by : Hossein B. Takallou
Download or read book Evaluation of Mix Ingredients on the Performance of Rubber-modified Asphalt Mixtures written by Hossein B. Takallou. This book was released on 1987. Available in PDF, EPUB and Kindle. Book excerpt: Rubber-modified asphalt pavements have been used in Sweden and the United States since the 1970's. In these applications ground recycled tire particles (1/4 inch minus) are added to a gap-graded aggregate and then mixed with hot asphalt cement. The benefits of adding rubber to the mix include increased skid resistance under icy conditions, improved flexibility and crack resistance, elimination of solid waste, and reduced traffic noise. The major disadvantage of these rubber-modified mixes is their high cost in relation to conventional asphaltic concrete pavements. This research project consisted of a laboratory study of mix properties as a function of variables such as rubber gradation and content, void content, aggregate gradation, mix process, temperature, and asphalt content. Twenty different mix combinations were evaluated for diametral modulus and fatigue at two different temperatures ( -6°C, +10°C). Also, five different mix combinations were evaluated for static creep and permanent deformation. Layered theory was used to evaluate the effects of mixture variations on pavement life. The resulting information was used to develop guidelines for use of rubber asphalt mixes in United States road systems. The findings of the field survey indicate that the rubber-modified asphalt mixture is more susceptible than the conventional mixtures to preparation and compaction problems when adverse weather or equipment problems occur. However, with adequate equipment and favorable weather conditions, the rubber-modified asphalt mixture placement is similar to conventional mixture placement. The field study also indicates that stopping distances can be reduced 20 percent for the rubber-modified pavements in icy conditions. In view of the significant reductions in wintertime stopping distances under icy or frosty road surface conditions, the use of coarse rubber in asphalt pavements should be seriously considered. This is particularly true for areas such as bridge decks, on and off freeway ramps or insulated roadway sections. The findings of the laboratory study indicate that the rubber gradation and content, aggregate gradation, and use of surcharge during sample preparation have considerable effect on modulus and fatigue life of the mix. The results of static creep and permanent deformation tests indicate that the rubber asphalt mixes had low stability and high elasticity. Also, due to greater allowable tensile strain in rubber-modified mixtures, the thickness of the modified mixture can be reduced, using a layer equivalency of 1.4 to 1.0.
