Fracture and Tensile Characteristics of Asphalt-Rubber Concrete
- 1 November 1999
- journal article
- Published by American Society of Civil Engineers (ASCE) in Journal of Materials in Civil Engineering
- Vol. 11 (4) , 287-294
- https://doi.org/10.1061/(asce)0899-1561(1999)11:4(287)
Abstract
Fracture and tensile characteristics of asphalt concrete mixtures affect the structural performance of pavements, particularly under low-temperature conditions. This paper reports a study of the tensile and fracture properties of asphalt-rubber (AR) concrete mixtures that formed the basis for the recommendation of an optimum asphalt mixture design incorporating crumb rubber from scrap tires. The work involved a full-factorial experiment with three different rubber contents (19, 22, and 24%), and three different AR binder contents (6, 7.5%, and 9%) in a surface mixture. Fracture and indirect tension tests were performed on AR concrete beams and Marshall test samples, respectively, at two different test temperatures of 25 and 5°C. The variables studied were indirect tensile strength, peak center-point load carried, load-point displacement, and unit fracture energy. The results show that higher mean values of indirect tensile strength and fracture energy were obtained corresponding to the highest AR binder c...Keywords
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