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现代隧道技术 2023, Vol. 60 Issue (1) :270-280    DOI:
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赤泥基注浆加固材料制备与性能研究
(1.山东高速集团有限公司,济南 250098;2.山东省固体废弃物资源化技术创新中心,济南 250098;3.山东大学岩土与结构工程研究中心,济南 250061)
Study on the Preparation and Performance of Red Mud-based Grouting Reinforcement Materials
(1. Shandong Hi-Speed Group Co., Ltd., Jinan 250098; 2. Shandong Solid Waste Recycling Technology Innovation Center, Jinan 250098; 3. Geotechnical and Structural Engineering Research Center, Shandong University, Jinan 250061)
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摘要 为满足岩溶塌陷区注浆加固治理需求,选用赤泥、钢渣等固废,制备高性能赤泥基注浆加固材料,建立凝结时间、力学强度、膨胀性等性能的调控方法。试验结果表明,水泥掺量的变化对结石体7 d抗压强度的影响最大,赤泥基注浆加固材料7 d抗压强度随水泥掺量的增加呈先增大后减小的趋势,当单因素作用时,水泥掺量为15%时强度最高。结合单因素对浆液终凝时间和对结石体7 d力学强度的影响,可确定水泥掺量为15%、钢渣掺量为 15%、激发剂掺量为12%时,赤泥基注浆加固材料性能最优且流动性能优异。综合考虑赤泥基注浆加固材料的终凝时间和力学强度,确定每种膨胀剂的最优掺量为UEA膨胀剂6%、CSA膨胀剂6%、塑性膨胀剂0.2%。
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关键词赤泥   岩溶塌陷   注浆加固材料   性能调控   作用机理     
Abstract: In order to meet the needs of grouting reinforcement and treatment in karst collapse areas, solid wastes such as red mud and steel slags are selected to prepare high-performance red mud-based grouting reinforcement materials and to establish methods for regulating properties such as setting time, mechanical strength and swellability. The test results show that the change in cement content has the greatest influence on the 7 d compressive strength of stones. The 7 d compressive strength of red mud-based grouting reinforcement materials shows a trend of increasing first and then decreasing with the increase of cement content. When the single factor acts, the strength is the highest when the cement content is 15%. Combined with the influence of single factors on the final setting time of grout and the 7 d mechanical strength of stones, it can be determined that the red mud-based grouting reinforcement materials have the best performance and excellent fluidity when the cement content is 15%, the steel slag content is 15% and the activator content is 12%. Considering the final setting time and mechanical strength of red mudbased grouting reinforcement materials, it is determined that the optimal mixing amount of each kind of expansive agent is 6% of UEA expansive agent, 6% of CSA expansive agent and 0.2% of the plastic expansive agent.
KeywordsRed mud,   Karst collapse,   Grouting reinforcement materials,   Property regulating,   Action mechanism     
基金资助:山东省重点研发计划(重大科技创新工程项目,2020CXGC011405);山东省重大科技创新工程项目(2021CXGC010301);山东省自然科学基金青年项目(ZR2022QE119).
作者简介: 张 宁(1983-),女,硕士,高级工程师,主要从事固废基交通工程材料方面的研究工作,E-mail: 511220522@qq.com. 通讯作者:马川义(1987-),男,硕士,高级工程师,主要从事公路设计与材料研发方面的研究工作,E-mail:824403006@qq.com.
引用本文:   
.赤泥基注浆加固材料制备与性能研究[J]  现代隧道技术, 2023,V60(1): 270-280
.Study on the Preparation and Performance of Red Mud-based Grouting Reinforcement Materials[J]  MODERN TUNNELLING TECHNOLOGY, 2023,V60(1): 270-280
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