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Pavement performance of composite process rubber asphalt mixture |
1. Key Laboratory for Special Areal Highway Engineering of Ministry of Education, Chang′an University, Xi′an, Shaanxi 710064, China; 2. Department of Organization in Tongzhou District of Nantong, Nantong, Jiangsu 226300, China; 3.School of Material Science and Engineering, Chang′an University, Xi′an, Shaanxi 710064, China |
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Abstract To investigate the technical indexes of composite process rubber asphalt and the mixture road performance, appropriate dosage of cleavage agent was added in the process of preparing mixture, and the reasonable processing temperature and time were determined. Based on the tests of water stability, low temperature bending and fatigue properties, the durabilities of 4 kinds of composite process rubber asphalt mixtures were determined. The test results show that when the dosage of cleavage agent is 0.4%, the appropriate processing conditions of rubber modified asphalt are at 190 ℃ for 2 hours. With the addition of cleavage agent, rubber asphalt mixture has excellent high temperature property, low temperature property and anti-water damage property, and the dynamic stability is about 3 times as much as that of asphalt mixture. The rubber asphalt mixture by composite process has excellent anti-water damage property, fatigue resistance and low-temperature bending performance, and the flexural tensile failure strain is even higher than that of rubber particle SBS modified asphalt mixture.
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Received: 12 October 2016
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