Establishment and Evaluation of Constitutive Model of High Modulus Asphalt at Low Temperature Based on BBR Test
SHA Dong1,2,*, LI Gen1, WANG Fang1, TANG Min3, LIU Yiding2
1 School of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, China 2 Ningxia Highway Survey and Design Institute Limited Liability Company, Yinchuan 750001, China 3 Ningxia Highway Management Center, Yinchuan 750002, China
Abstract: Four kinds of typical high modulus asphalts were selected for the bending beam rheology (BBR) test, and their creep characterization para-meters at low temperatures were obtained. Then, three viscoelastic constitutive models were used to explore the constitutive relationships of several high modulus asphalts at low temperatures, respectively. Finally, the constitutive models applicable to high modulus asphalts at low temperatures were further evaluated by the gray relation analysis (GRA) model. The results show that the low-temperature limit of crumb rubber composite modified high modulus asphalt (CRA) and high modulus agent modified asphalt (HIA) is -12 ℃, while that of high-content SBS modified asphalt (SBA) and high modulus asphalt prepared with 35# hard asphalt (HGA) is -6 ℃. Compared with the three-parameter solid (TPS) model and the four-parameter solid (FPS) model, the Burgers model has a higher fitting accuracy, a more significant regularity, and a lower vo-latility of the model parameters when evaluating the low temperature performance of high modulus asphalt. Moreover, through the GRA evaluation results, it's found that the Burgers model is more suitable for characterizing the creep behavior of high modulus asphalt at low temperatures than TPS model and the FPS model.
沙东, 李根, 王芳, 唐民, 刘乙丁. 基于BBR试验的高模量沥青低温本构模型的建立与评价[J]. 材料导报, 2025, 39(22): 24080054-7.
SHA Dong, LI Gen, WANG Fang, TANG Min, LIU Yiding. Establishment and Evaluation of Constitutive Model of High Modulus Asphalt at Low Temperature Based on BBR Test. Materials Reports, 2025, 39(22): 24080054-7.
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2025, Vol. 39 
