高流态疏水型洗砂泥固化剂研究  

Study on High-flow Hydrophobic Sand Washing Mud Curing Agent

作　　者：杨昭乾 王东[1] 杨阳[1] 李平[1] 彭贝 YANG Zhao-qian;WANG Dong;YANG Yang;LI Ping;PENG Bei(Longdong University,Qingyang 745000,Gansu;Qingyang Municipal Housing and Urban and Rural Construction Buerau,Qingyang 745000,Gansu)

机构地区：[1]陇东学院,甘肃庆阳745000 [2]庆阳市住房和城乡建设局,甘肃庆阳745000

出　　处：《陇东学院学报》2024年第5期64-68,共5页Journal of Longdong University

基　　金：2020年甘肃省自然科学基金项目(20JR10RA132);甘肃省青年科技基金计划(22JR5RM212);甘肃省高等学校创新基金项目(2022A-136);2021-2035年庆阳市水资源的承载力评估与优化配置研究(QY2021A-S058);镇原县金龙工业集中区土地集约利用检测统计评价报告(HXZK2304)。

摘　　要：针对洗砂泥固化过程中存在的固化土流动性差、渗透性强、强度低等问题,开发了一种高流态疏水型洗砂泥固化剂。研究设计了7种不同配比的固化剂,通过测试固化土的流动度、吸水率、抗压强度、水稳定性等指标,评价了不同配比对固化土性能的影响。研究结果表明,组合2(42.5水泥30%+粉煽灰16%+矿渣24%+氧化镁10%+聚羧酸3.5%+硬脂酸钙4.5%+硅酸钠12%)综合表现最佳,具有良好的流动性、强度、抗渗性和水稳定性。合理选择减水剂、憎水剂种类和用量,并适量掺入矿物掺合料是提升固化土综合性能的关键。相比传统普通水泥基和掺合料型固化剂配比,本研究提出的高流态疏水型固化剂配方性能更佳,具有一定的创新性和实用价值,可有效解决洗砂泥固化过程存在的问题,促进该领域技术的发展。This article focuses on the issues of poor flow ability,strong permeability,and low strength in the solidification process of washed sand sludge.A high-flow and water-repellent solidification agent for washed sand sludge was developed.Seven different ratios of solidification agents were designed and tested to evaluate their impact on the performance of the solidified soil,including flow ability,water absorption,compressive strength,and water stability.The research results indicate that Combination 2(42.5%cement,30%fly ash,16%slag,10%magnesium oxide,3.5%polycarboxylate superplasticizer,4.5%calcium stearate,12%sodium silicate)performs the best,demonstrating good flow ability,strength,impermeability,and water stability.The key to improving the overall performance of the solidified soil lies in the appropriate selection and dosage of water reducing agents,water repellents,and the proper incorporation of mineral admixtures.In comparison to traditional ordinary cement-based and admixture-based solidification agent formulations,the proposed high-flow and water-repellent solidification agent formulation in this study exhibits superior performance,demonstrating innovation and practical value.It effectively addresses the issues in the solidification process of washed sand sludge and promotes technological development in this field.

关 键 词：洗砂泥固化 高流态 疏水性 矿物掺合料 抗压强度 

分 类 号：TU528[建筑科学—建筑技术科学]