Temperature Dependency of Dynamic Mechanical Properties of Cement Asphalt Paste by DMTA Method
来源期刊:Journal Of Wuhan University Of Technology Materials Science Edition2017年第6期
论文作者:方雷 YUAN Qiang PAN Yunrui WANG Yong KHAYAT Kamal 邓德华
文章页码:1379 - 1387
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.
方雷1,YUAN Qiang1,PAN Yunrui1,WANG Yong1,KHAYAT Kamal2,邓德华1
1. School of Civil Engineering, National Engineering Laboratory for Construction of High Speed Railway, Central South University2. 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.
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