长沙理工大学学报（自然科学版）2026，Vol.23Issue(2)：59-68,10.DOI:10.19951/j.cnki.1672-9331.20260129001
预处理工艺对钢渣特性与钢渣沥青混合料路用性能的影响研究
Study on influence of pretreatment processes on steel slag characteristics and road performance of steel slag asphalt mixture
摘要
Abstract
[Purposes]To address the two major technical bottlenecks of poor volume stability and insufficient interfacial moisture stability when steel slag is used as aggregate in asphalt mixture,this study aims to explore effective pretreatment processes to promote efficient resource utilization of steel slag in road engineering.[Methods]Five pretreatment processes,namely natural aging,steam treatment,acetic acid immersion,oxalic acid modification,and polyvinyl alcohol(PVA)treatment,were used to pretreat steel slag.The pretreatment effects were systematically evaluated through macroscopic tests such as water immersion expansion and freeze-thaw cycle mass loss,along with microscopic analysis.Subsequently,modified steel slag was used to prepare SMA-13 asphalt mixture,and its road performance was examined.[Results]Oxalic acid treatment significantly reduces the water immersion expansion rate and freeze-thaw cycle mass loss rate of steel slag.Scanning electron microscope(SEM)analysis shows the formation of dense precipitates on its surface,which effectively enhances the volume stability.PVA treatment forms a reticular organic coating on the steel slag surface,noticeably improving its water absorption and adhesion to asphalt.The asphalt mixture prepared with these two modified steel slags exhibits significantly better high-temperature stability,moisture stability,and raveling resistance than that prepared with merely naturally aged steel slag.[Conclusions]From macroscopic and microscopic perspectives,this study reveals that pretreatment can improve steel slag performance through a"surface modification and interface strengthening"mechanism.It verifies that the the mixture exhibits excellent road performance,providing theoretical support and technical foundation for the large-scale resource utilization of steel slag in asphalt pavement.关键词
沥青混合料/钢渣/预处理工艺/路用性能/体积安定性/资源化利用Key words
asphalt mixture/steel slag/pretreatment process/road performance/volume stability/resource utilization分类
交通工程引用本文复制引用
钱国平,刘禹,于华南,孙宇扬,邹腾,唐敏,孟涛..预处理工艺对钢渣特性与钢渣沥青混合料路用性能的影响研究[J].长沙理工大学学报（自然科学版）,2026,23(2):59-68,10.基金项目
国家重点研发计划项目(2024YFB2605101) （2024YFB2605101）
