摘要
采用灰靶决策理论对钢渣胶粉改性沥青混合料进行最优配合比设计,制备3种沥青混合料,通过低温抗裂和低温蠕变试验综合分析其低温性能。结果表明:以5~20 mm粒径的钢渣部分替代玄武岩胶粉改性沥青混合料路用性能最优;混合料中钢渣所占比例越大,低温性能越好,但全钢渣沥青混合料在低于−10℃的温度下,最大弯拉强度和最大弯拉应变出现不稳定的变化规律,表明较低的温度或较大的钢渣含量均会使开裂集中发生于沥青胶浆。
The optimal mixture proportion of steel slag asphalt mixture modified by rubber powder was first designed by gray target decision theory and three asphalt mixtures were prepared.Then,the low-temperature anti-cracking and lowtemperature creep tests were conducted to comprehensively analyze its low-temperature performance.The results show that the road performance of the asphalt mixture modified with 5-20 mm steel slag is the best.The larger the proportion of steel slag in the asphalt mixture,the better the low-temperature performance of the asphalt mixture.However,the maximum bending tensile strength and maximum bending tensile strain of the all-steel slag asphalt mixture exhibit unstable changes at temperatures below−10℃,indicating that lower temperatures or higher steel slag content may cause cracking to concentrate in the asphalt binder.
作者
李百富
周宝宏
杨冬
LI Baifu;ZHOU Baohong;YANG Dong(Shanghai Yuantong Road and Bridge Engineering Co.,Ltd.,Shanghai 200120,China;CCCC Second Public Bureau Dongmeng Engineering Co.,Ltd.,Xi'an 710000,China)
出处
《路基工程》
2025年第3期91-97,共7页
Subgrade Engineering
关键词
钢渣
改性沥青
配合比设计
低温性能
固废处理
经济型
steel slag
modified asphalt
mixing ratio design
low temperature performance
solid waste treatment
economical
