Download or read book Report written by and published by . This book was released on 1964 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Simplified Procedures for Evaluating Low cost TSM Projects written by John R. Hamburg and published by . This book was released on 1983 with total page 732 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Influence of Asphalt Temperature Susceptibility on Pavement Construction and Performance written by Joe W. Button and published by Transportation Research Board National Research. This book was released on 1983 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Beneficial Effects of Selected Additives on Asphalt Cement Mixes written by D. Y. Lee and published by . This book was released on 1987 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: Effects of polyolefins, neoprene, styrene-butadiene-styrene (SBS) block copolymers, styrene-butadiene rubber (SBR) latex, and hydrated lime on two asphalt cements were evaluated. Physical and chemical tests were performed on a total of 16 binder blends. Asphalt concrete mixes were prepared and tested with these modified binders and two aggregates (crushed limestone and gravel), each at three asphalt content levels. Properties evaluated on the modified binders (original and thin-film oven aged) included: viscosity at 25 deg C, 60 deg C and 135 deg C with capillary tube and cone-plate viscometer, penetration at 5 deg C and 25 deg C, softening point, force ductility, and elastic recovery at 10 deg C, dropping ball test, tensile strength, and toughness and tenacity tests at 25 deg C. From these the penetration index, the viscosity-temperature susceptibility, the penetration-viscosity number, the critical low-temperature, long loading-time stiffness, and the cracking temperature were calculated. In addition, the binders were studied with x-ray diffraction, reflected fluorescence microscopy, and high-performance liquid chromatography techniques. Engineering properties evaluated on the 72 asphalt concrete mixes containing additives included: Marshall stability and flow, Marshall stiffness, voids properties, resilient modulus, indirect tensile strength, permanent deformation (creep), and effects of moisture by vacuum-saturation and Lottman treatments. Pavement sections of varied asphalt concrete thicknesses and containing different additives were compared to control mixes in terms of structural responses and pavement lives for different subgrades. Although all of the additives tested improved at least one aspect of the binder/mixture properties, no additive was found to improve all the relevant binder/mixture properties at the same time. On the basis of overall considerations, the optimum beneficial effects can be expected when the additives are used in conjunction with softer grade asphalts.

Download or read book Annual Report Highway Research and Development in Iowa for the Fiscal Year Ending June 30 written by and published by . This book was released on 1984 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Laboratory Evaluation of Asphaltic Concrete Containing Asphadur written by Lowell J. Zearley and published by . This book was released on 1978 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Laboratory Studies of Asphaltic Concretes Containing Asbestos Fibers Rubberized Asphalt and Epoxy resin Asphalt written by United States. Bureau of Reclamation and published by . This book was released on 1965 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study on uses of additives for improving asphaltic concrete for hydraulic construction showed that fine asbestos fibers (waste screenings) can be used advantageously. The increased compressive and tensile strength, stability, and erosion resistance properties gained with the fibers should provide a highly durable material capable of withstanding the major stresses that develop during service. Of the two rubberized asphalts tested, GRS and neoprene, it was indicated that the neoprene asphalt produced the better asphaltic concrete, particularly on the basis of stability and erosion resistance. Compared to the control, asbestos fibers, and rubberized asphalt mixes, the epoxy-asphalt concrete excelled in all physical properties determinations with the exception that flexibility was less than the rubberized asphalt mixes, and erosion resistance was comparable to the asbestos fiber mixes. The epoxy-asphalt concrete appears to be a very strong and tough material for hydraulic construction application; however, more data are required relative to its long-term weatherability. The relatively high cost of epoxy-asphalt approximately five times that of normal hot-mix, would restrict its use to special applications.

Download or read book Use of Antistripping Additives in Asphaltic Concrete Mixtures written by David G. Tunnicliff and published by Transportation Research Board. This book was released on 1995 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Laboratory Evaluation of Asphalt rubber in Asphalt Paving Mixtures written by John F. Adam and published by . This book was released on 1990 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: