INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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Fatigue Characterization of Hard Petroleum Asphalt Based on the Linear Amplitude Sweep Test |
ZHANG Xijun1, TONG Peipei2, LIN Xixiong3, LI Jianxin2, LI Bo1
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1 National and Provincial Joint Engineering Laboratory of Road & Bridge Disaster Prevention and Control, Lanzhou Jiaotong University, Lanzhou 730070, China 2 Research Institute of PetroChina Fuel Oil Co., Ltd., Beijing 100195, China 3 PetroChina Karamay Petrochemical Co., Ltd., Karamay 834003, China |
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Abstract To evaluate the fatigue property of hard petroleum asphalt, select the representative four kinds of hard petroleum asphalt and SBS modified asphalt of comparative sample, five kinds asphalt were subject to short-term and long-term aging by using rolling thin film oven test (RTFOT) and pressure aging vessel (PAV) test. Their fatigue parameters such as storage modulus, loss modulus, shear strain, shear stress were evaluated by linear amplitude sweep (LAS) test at different temperatures. Using viscoelastic continuum damage (VECD) model calculated the fatigue life of asphalt. The result indicate that the stress-strain withstand capacity, damage resistance and fatigue life of hard petroleum asphalt under repeated loading with aging; hard petroleum asphalt has increased resistance to damage, reduced virtual modulus attenuation, and increased fatigue life with increasing temperature; the fatigue property better with grade of hard petroleum asphalt increasing, compared with the different oil source and the same grade of hard petroleum asphalt, the fatigue property better with penetration increasing; when hard petroleum asphalt was used for low-strength pavement, it fatigue life can evaluate though strains at peak stress in stress-strain curve.
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Published: 30 September 2021
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Fund:This work was financially supported by the National Natural Science Foundation of China (51668038, 51868042), Industry Support and Guidance Project by University and College in Gansu Province (2020C-13), Gansu Provincial Outstanding Youth Fund (1606RJDA318), Gansu Natural Science Foundation (1506RJZA064), Foundation of a Hundred Youth Talents Training Program of Lanzhou Jiaotong University, the Transportation Construction Science and Technology Foundation of Gansu Province (2010-12). |
About author:: Xijun Zhang, master candidate, is studying at School of Civil Engineering, Lanzhou Jiaotong University. His research interest is functional road materials. |
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