| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Preparation and Dynamic Mechanical Properties of High-Modulus Asphalt Modified by Waste Rubber |
| XIN Xue1, SU Linping1, LIANG Ming1, YAO Zhanyong1, FAN Weiyu2, NAN Guozhi2, ZHANG Jizhe1
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1 School of Qilu Transportation, Shandong University, Jinan 250002, China
2 State Key Laboratory of Heavy Oil Processing, China University of Petroleum(East China), Qingdao 266580, China |
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Abstract With de-oiled asphalt (DOA) as the main raw material, waste rubber powder of different particle size and contents was added respectively to prepare high-modulus asphalt. Conventional properties analysis, dynamic mechanical analysis and fluorescence microscopy were performed for the products. Results show that rubber powder is not completely compatible with the asphalt but dispersed in the asphalt in the form of dispersed phase existing in the asphalt in the form of strip or rod. With the increase of rubber amounts, softening point increases gradually and the high-temperature performance is obviously improved. It is caused by the swelling of waste rubber powder after absorbing the light part of asphalt and the increase of asphaltene content. At the same temperature, G*, G′ and G″ all showed an obvious upward trend with the increase of waste rubber content, indicating more obvious of improvement effect and more favorable rutting resistance of high-modulus asphalt with the higher the waste rubber powder content. By fitting the relationship between G*/sinδ and temperature under different waste rubber amount, the high tempe-rature grade of high-modulus asphalt increases by 1.66℃ for every 1wt% increase of waste rubber.
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Published: 12 September 2020
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| Fund:This work was financially supported by the National Natural Science Foundation of China (51908330) and Post-doctoral Innovation Project of Shandong Pro-vince (201901007). |
About author:: Xue Xin, a doctoral candidate of Shandong University, is mainly engaged in the research of road asphalt materials and road intelligent monitoring sensors. She has published 8 SCI and EI papers in the first or second place, and applied for 9 national invention patents. She has won more than 50 honors and awards, such as national scholarship, outstanding student of shandong province, special prize of Shandong “challenge cup” extracurricular academic works competition
Zhanyong Yao, professor of Shandong University, doctoral supervisor, vice president of Qilu Transportation Research Institute, director of highway engineering technology research and development center. He has been engaged in the material and structure design of highway subgrade and pavement for a long time. He has studied the mechanism of highway diseases and the theo-ry and engineering technology of subgrade design. Meanwhile, he focuses on the detection of sensitive materials and related engineering technologies under large strain of asphalt pavement are studied, and the sensitive monitoring materials and sensors suitable for road micro-strain monitoring are developed, and the research results have been applied in road structure monitoring. More than 60 papers with high level SCI/EI have been published. He has published 4 monographs and 3 local standards. He has won 6 provincial and ministerial science and techno-logy awards and more than 20 national invention patents. |
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2020, Vol. 34 
