Title: Laboratory Study on Asphalt Rubber Mixture Evaluation Index for High Temperature Performance
Abstract: Asphalt rubber mixture was made by base asphalt and crumb rubber used in domestic's pavement engineering.By systematic laboratory rutting tests,the relationships between dynamic stability of asphalt rubber mixture and 177℃brookfield viscosity,softening point,penetration of asphalt rubber binder were studied.The results indicate that the 177℃brookfield viscosity and softening point of binder can be used as evaluation index for the high-temperature performance of asphalt rubber mixture.The results also indicate that the Americal requirement(ASTM D 6144—97) for 177℃brookfield viscosity and softening point are inconvenient and corresponding asphalt rubber mixture rutting test result may be too low according to Chinese specification(JTJ F40—2004) for polymer-modified mixture.So more convenient requirement for 177℃brookfield viscosity and softening point are advised based on laboratory rutting tests and domestic's engineering experience.The results also indicate that high-temperature performance of asphalt rubber mixture remarkably varies with different types of crumb rubber.
Publication Year: 2010
Publication Date: 2010-01-01
Language: en
Type: article
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