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硅酸盐通报 ›› 2026, Vol. 45 ›› Issue (9): 3330-3340.DOI: 10.16552/j.cnki.issn1001-1625.2026.0254

• 道路材料 • 上一篇    

采石场副产物对水泥稳定铁尾矿砂路面基层材料性能的影响

陈潇1,2,3(), 马希凯1, 江瑞4, 舒扬4, 黄敏4, 黄诗杰5   

  1. 1.武汉理工大学材料科学与工程学院,武汉 430070
    2.武汉理工大学硅酸盐科学与先进建材全国重点实验室,武汉 430070
    3.长治市武理工工程技术研究院,长治 047500
    4.湖北交投鄂东建设管理有限公司,武汉 430024
    5.湖北中桥科技有限公司,武汉 430075
  • 收稿日期:2026-03-18 修订日期:2026-04-05 出版日期:2026-09-15 发布日期:2026-10-09
  • 作者简介:陈 潇 (1981—),男,博士,教授。主要从事固废资源化利用和水泥基材料的研究。E-mail:chenxiao1981@whut.edu.cn
  • 基金资助:
    湖北省交通运输厅2024年交通运输重点科技项目(2024-81-Z-1-4)

Effects of Quarry By-Products on Performance of Cement-Stabilized Iron Tailings Pavement Base Materials

CHEN Xiao1,2,3(), MA Xikai1, JIANG Rui4, SHU Yang4, HUANG Min4, HUANG Shijie5   

  1. 1.School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China
    2.State Key Laboratory of Silicate Science and Advanced Building Materials,Wuhan University of Technology,Wuhan 430070,China
    3.Changzhi Wuli Engineering Technology Research Institute,Changzhi 047500,China
    4.Hubei Jiaotou Edong Construction Management Co. ,Ltd. ,Wuhan 430024,China
    5.Hubei Zhongqiao Technology Co. ,Ltd. ,Wuhan 430075,China
  • Received:2026-03-18 Revised:2026-04-05 Published:2026-09-15 Online:2026-10-09

摘要:

将采石场副产物(QBP)应用于水泥稳定铁尾矿砂路面基层材料中,能改善铁尾矿砂颗粒细小所导致的基层材料强度不足、收缩开裂等问题,从而实现铁尾矿砂的大规模资源化利用。本文系统研究了QBP掺量及其细颗粒(粒径d<0.075 mm)的塑性指数对水泥稳定铁尾矿砂力学性能、体积稳定性及耐久性能的影响,采用膨胀剂调控收缩应变,并结合微观分析揭示QBP的作用机理。结果表明:当QBP掺量为40%(质量分数)时,与未掺组相比,7 d无侧限抗压强度提升48.37%,收缩应变降低42.50%,抗冻系数与水稳系数分别提高15.22%与13.83%;提高细颗粒塑性指数可改善水泥稳定铁尾矿砂的力学与耐久性能,但会增加收缩开裂的风险;掺入膨胀剂后,收缩应变较未掺组降低48.69%,与同强度等级水泥稳定碎石的收缩应变基本相当。微观分析显示,QBP可优化水泥稳定铁尾矿砂混合料的堆积结构,提高密实度并降低孔隙率,从而改善其路用性能。

关键词: 铁尾矿砂, 采石场副产物, 路面基层材料, 膨胀剂, 塑性指数, 耐久性能

Abstract:

Applying quarry by-product (QBP) to cement-stabilized iron tailings pavement base material for roads can improve the problems such as insufficient strength and shrinkage cracking of the base material caused by the fine particles of iron tailings sand, thereby achieving large-scale resource utilization of iron tailings. This paper systematically studied the effects of QBP content and the fine particle plasticity index (particle size d<0.075 mm) on the mechanical properties, volume stability, and durability of cement-stabilized iron tailings. The shrinkage strain was regulated by an expansion agent, and the mechanism of QBP was revealed through microscopic analysis. The results show that when the QBP content is 40%(mass fraction), compared with the unmodified group, the 7 d unconfined compressive strength increases by 48.37%, the shrinkage strain decreases by 42.50%, and the frost resistance coefficient and water stability coefficient increase by 15.22% and 13.83%, respectively. Increasing the fine particle plasticity index improves the mechanical and durability properties of cement-stabilized iron tailings, but it also increases the risk of shrinkage cracking. After adding expansion agent, the shrinkage strain decreases by 48.69% compared with the unadulterated group, and is almost equivalent to the shrinkage strain of cement-stabilized crushed stone of the same strength grade. Microscopic analysis shows that QBP can optimize the packing structure of the cement-stabilized iron tailings mixture, improve the density and reduce the porosity, thereby improving the road performance.

Key words: iron tailings, quarry by-product, pavement base material, expansive agent, plasticity index, durability

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