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"TRB Transportation Research Record: Journal of the Transportation Research Board, No. 2370 consists of 18 papers that explore blending-zone morphology; simplification of the linear amplitude sweep test and specification parameters; rejuvenator's effectiveness with conventional mix testing; warm rubberized asphalt cement; recycled asphalt shingle binder characterization and blending with virgin binders; surface performance-graded specification for chip seal binders; viscoelastic analysis of bituminous mortar; low-temperature oxidation kinetics of asphalt binders; and recovery and laboratory testing of asphalt emulsion residues. This issue of the TRR also examines the evolution of the crossover modulus with oxidative aging; critical problems with using the asphalt ductility test; crumb rubber modifier dissolution into the asphalt matrix; low-temperature properties of asphalt binders and mixtures; crumb rubber modifier dissolution; binder aging in hot-mix asphalt mixtures; anti-strip agents in asphalt mixtures; the five-point bending test; and shear resistance of improved steel-asphalt interfaces." -- pub. desc.
In recent years, with the rapid development of the world transportation industry, the proportion of asphalt pavement in road engineering is increasing. Therefore, while the demand for asphalt and asphalt mixture is increasing, the quality requirements for materials are also improving. In particular, new materials and new technologies are constantly emerging, and the application technology, theory, and technical specifications of asphalt materials have made great progress.
This guide reviews the way asphalt mixture can be specified, with particular emphasis on the test methods used to measure performance. The advantages and limitations of the tests are described for measuring the desired property, and engineers can specify a test according to the material’s use. The book starts with a resume of specifications and their relative advantages and disadvantages for different situations. Then different properties are discussed in terms of: their specification; the test methods that can be used (primarily the EN 12697 suite of European methods, of which the author has been responsible for drafting); the extent to which the results predict performance; the levels that can be achieved with different asphalt mixes and types; what levels, if any, should be specified in various situations and pavement layers; and which other properties are adversely affected by enhanced performance. The final section covers various aspects of sustainability, with a strong emphasis on durability. Better understanding should enable clients and consultants who specify pavements to produce durable asphalt pavements more economically, and also help asphalt producers and students trying to understand the black art of asphalt.
The purpose of this manual is to familiarize industry and students with the technology of asphalt in its several forms namely asphalt cement, cutback asphalt, and asphalt emulsions. The laboratory work is designed to develop an understanding of asphalt properties, characteristics, testing procedures, and specifications. The procedures outlined are all derived from ASTM designations and practice as recommended by the Asphalt Institute. Where the particular ASTM method permits alternate procedures, the one more applicable to the available equipment and the teaching situation was chosen.The manual consists of the following:ò 35 of the frequently used ASTM tests in Asphalt Binder and Mix Design.ò Sample computations and easy to use data sheets, most of which have been developed specifically for the manual.ò An up-to-date overview of Asphalt Technology including sources, historical development, and classifications of asphalt products.ò Easy to understand explanations for Voids Mineral Aggregate, Absorbed Asphalt, Effective Asphalt Content, Percent Air Voids, and Percent of Voids filled with Asphalt.ò A stand-alone asphalt manual, written specifically for university laboratory instruction, yet applicable for a commercial testing laboratory. Rarely will other reference materials need to be referred to.ò Dimensions in both the SI and the US Standard systems of measurement.ò An appendix with conversion factors, rules of safety and procedures, overview of SHRP SUPERPAVE, explanation of asphalt emulsions, and additional data sheets on single-sided pages.