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山东大学学报 (工学版) ›› 2023, Vol. 53 ›› Issue (1): 32-38.doi: 10.6040/j.issn.1672-3961.0.2022.016

• • 上一篇    

钢渣粉基沥青混合料的性能评价与提升机理

刘澔1,2   

  1. 1. 山西交通科学研究院集团有限公司, 山西 太原 030006;2. 黄土地区公路建设与养护技术交通运输行业重点实验室, 山西 太原 030006
  • 发布日期:2023-02-13
  • 作者简介:刘澔(1986— ),男,山西吕梁人,高级工程师,硕士,主要研究方向为公路工程路基路面材料性能. E-mail: hao358hao@126.com

Performance evaluation and improving mechanisms of steel slag powder based asphalt mixture

LIU Hao1,2   

  1. 1. Shanxi Transportation Research Institute Group Co., Ltd., Taiyuan 030006, Shanxi, China;
    2. Key Laboratory of Highway Construction and Maintenance Technology in Loess Region, Taiyuan 030006, Shanxi, China
  • Published:2023-02-13

摘要: 针对沥青混合料在服役阶段的水损害和疲劳开裂等病害,采用钢渣粉和钢渣集料分别替代矿粉和天然集料制备性能优异的沥青混合料,评价静水和水敏感性测试仪(moisture induced stress tester, MIST)模拟动水环境下的水敏感性、疲劳耐久性能和高低温性能。分析钢渣粉的化学组成、矿物组分、微观形貌和粒径分布并揭示对混合料性能提升机理。结果表明:与矿粉对照组相比,钢渣粉沥青混合料具有更优的抗动水损害性能和长期抗冻融损害能力。钢渣粉的加入可增大沥青混合料的动稳定度、弯拉应变和疲劳寿命,改善高温稳定性、低温抗裂性和疲劳抵抗能力。钢渣粉和钢渣集料均可提升混合料的性能指标,且两者复掺时提升效果更显著。钢渣粉中含有的碱性和弱水化活性的硅酸二钙矿物组分能有效提升与沥青的吸附性和化学键结合力,增强集料和沥青间的黏结强度。钢渣粉颗粒表面的微米级孔隙和絮状结构是沥青混合料的高温抗变形性能和耐久性增强的重要因素。

关键词: 钢渣粉, 沥青混合料, 水敏感性, 耐久性, 提升机理

中图分类号: 

  • U416.217
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