An Analysis over the Correlation Between Low Temperature Rheological Properties of SBS-modified Asphalt and Raw Materials’ Performance Parameters
MA Xiaoyan1,2, CHEN Huaxin1,2, ZHANG Xingyu3, XING Mingliang1,2, YANG Pingwen3, WANG Zhaoli3
1 School of Material Science and Engineering, Chang’an University, Xi’an 710061; 2 Engineering Research Center of Transportation Material of Ministry of Education, Chang’an University, Xi’an 710061; 3 Gansu Road and Bridge Construction Group Maintenance Technology Co., Ltd., Lanzhou 730050
Abstract: The low temperature rheological properties of SBS modified asphalt strongly depends on raw materials. This paper describes the correlation of the stiffness modulus (S) and creep rate (m) of SBS-modified asphalt with raw materials’ performance parameters. Orthogonal experiment of L25(53) was designed using five types of bitumen, five kinds of SBS modifier and five different levels of modifier adding amount, and the samples were tested using bending beam rheological (BBR) to obtain the -18 ℃ stiffness and m value. Range analysis was used to evaluate the influence level of different raw material, gray relational grade was used to analyze the correlation between raw material performance parameters and low temperature rheological properties of SBS-modified asphalt. According to the results obtained from the experimental program, bitumen has the most significant influence on SBS modified asphalt stiffness and m value, followed by the modifier, and the effect of SBS modifier adding amount was inconspicuous. The calculation indicated that bitumen performance parameters,-18 ℃ stiffness modulus, m value, and the composition such as the total content of colloid and aromatic, SBS performance parameters such as tensile stress, tensile strength, elongation have obvious correlations with the low temperature rheological properties of SBS-modified asphalt.
马晓燕, 陈华鑫, 张星宇, 邢明亮, 杨平文, 王兆力. SBS改性沥青低温流变性与原材料性能相关性研究[J]. 材料导报, 2018, 32(22): 3885-3890.
MA Xiaoyan, CHEN Huaxin, ZHANG Xingyu, XING Mingliang, YANG Pingwen, WANG Zhaoli. An Analysis over the Correlation Between Low Temperature Rheological Properties of SBS-modified Asphalt and Raw Materials’ Performance Parameters. Materials Reports, 2018, 32(22): 3885-3890.
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2018, Vol. 32 
