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Temperature Dependency of Dynamic Mechanical Properties of Cement Asphalt Paste by DMTA Method

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【作者】方雷； YUAN Qiang； PAN Yunrui； WANG Yong； KHAYAT Kamal；邓德华；

【Author】 FANG Lei;YUAN Qiang;PAN Yunrui;WANG Yong;KHAYAT Kamal;DENG Dehua;School of Civil Engineering, National Engineering Laboratory for Construction of High Speed Railway, Central South University;Department of Civil, Architectural and Environmental Engineering, Missouri University of Science and Technology;

【机构】 School of Civil Engineering, National Engineering Laboratory for Construction of High Speed Railway, Central South University； Department of Civil, Architectural and Environmental Engineering, Missouri University of Science and Technology；

【摘要】 We investigated the temperature dependency of the dynamic mechanical properties of cement asphalt paste by the dynamic mechanical thermal analysis(DMTA) method. The experimental results show that the dynamic mechanical properties of cement asphalt pastes are sensitive to temperature due to the inclusion of asphalt, and may go through different states within a temperature range of-40 ℃ to 60 ℃, which is different from that of pure cement and asphalt. As the temperature of the cement asphalt paste increases, a considerable change of dynamic mechanical properties, including storage modulus(E’), loss modulus(E’’) and loss factor(tand) is observed. Moreover, the influence of asphalt to cement(A/C) ratio on the temperature sensitivity of the dynamic mechanical properties of cement asphalt composites was investigated. The temperature dependency of cement asphalt composites is ascribed to the temperature dependency of the asphalt and its interaction with cement paste. A simple fractional model is proposed to describe the viscoelastic behavior of cement asphalt composites.更多还原

【Abstract】 We investigated the temperature dependency of the dynamic mechanical properties of cement asphalt paste by the dynamic mechanical thermal analysis(DMTA) method. The experimental results show that the dynamic mechanical properties of cement asphalt pastes are sensitive to temperature due to the inclusion of asphalt, and may go through different states within a temperature range of-40 ℃ to 60 ℃, which is different from that of pure cement and asphalt. As the temperature of the cement asphalt paste increases, a considerable change of dynamic mechanical properties, including storage modulus(E’), loss modulus(E’’) and loss factor(tand) is observed. Moreover, the influence of asphalt to cement(A/C) ratio on the temperature sensitivity of the dynamic mechanical properties of cement asphalt composites was investigated. The temperature dependency of cement asphalt composites is ascribed to the temperature dependency of the asphalt and its interaction with cement paste. A simple fractional model is proposed to describe the viscoelastic behavior of cement asphalt composites.更多还原

【关键词】 cement asphalt paste； dynamic mechanical property； dynamic mechanical thermal analysis； viscoelastic model；
【Key words】 cement asphalt paste； dynamic mechanical property； dynamic mechanical thermal analysis； viscoelastic model；

【基金】 Funded by the National Natural Science Foundation of China(50878209 and 51208515);the National Basic Research Program of China(“973”Program)(2013CB036201)

【文献出处】 Journal of Wuhan University of Technology(Materials Science) ,武汉理工大学学报(材料科学版)(英文版) , 编辑部邮箱 ,2017年06期

【分类号】TQ177.6
【被引频次】1
【下载频次】64

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