Study on the Optimum Steel Slag Content of SMA-13 Asphalt Mixes Based on Road Performance

被引:12
作者
Chen, Wei [1 ]
Wei, Jincheng [1 ,2 ]
Xu, Xizhong [2 ]
Zhang, Xiaomeng [2 ]
Han, Wenyang [2 ]
Yan, Xiangpeng [2 ]
Hu, Guiling [1 ]
Lu, Zizhao [3 ]
机构
[1] Shandong Jianzhu Univ, Sch Transportat Engn, Jinan 250101, Peoples R China
[2] Shandong Transportat Inst, Sci & Technol Innovat Ctr, Jinan 250102, Peoples R China
[3] Shandong Transportat Planning & Design Res Inst C, Jinan 250031, Peoples R China
关键词
different steel slag content; SMA-13 asphalt mixture; pavement performance; optimal steel slag content; OXYGEN FURNACE SLAG; MIXTURE; AGGREGATE; RESISTANCE;
D O I
10.3390/coatings11121436
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
To reduce the use of aggregates such as limestone and basalt, this paper used steel slag to replace some of the limestone aggregates in the production of SMA-13 asphalt mixes. The optimum content of steel slag in the SMA-13 asphalt mixes was investigated, and the performance of these mixes was evaluated. Five SMA-13 asphalt mixes with varying steel slag content (0%, 25%, 50%, 75%, and 100%) were designed and prepared experimentally. The high-temperature stability, low-temperature crack resistance, water stability, dynamic modulus, shear resistance, and volumetric stability of the mixes were investigated using the wheel tracking, Hamburg wheel tracking, three-point bending, freeze-thaw splitting, dynamic modulus, uniaxial penetration, and asphalt mix expansion tests. The results showed that compared to normal SMA-13 asphalt mixes, the high-temperature stability, water stability, and shear resistance of the SMA-13 asphalt mixes increased and then decreased as the steel slag content increased. All three performance indicators peaked at 75% steel slag content, and the dynamic stability, freeze-thaw splitting ratio, and uniaxial penetration strength increased by 90.48%, 7.39%, and 88.08%, respectively; however, the maximum bending tensile strain, which represents the low-temperature crack resistance of the asphalt mix, decreased by 5.98%. The dynamic modulus of the SMA-13 asphalt mixes increased with increasing steel slag content, but the volume expansion at a 75% steel slag content was 0.446% higher than at a 0% steel slag content. Based on the experimental results, the optimum content of steel slag for SMA-13 asphalt mixes was determined to be 75%.
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页数:16
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