固废基土壤固化剂对固化土延迟力学性能的影响  

Effect of Solid Waste Based Soil Solidification Agent on Delayed Mechanical Properties of Stabilized Soil

作　　者：张宁 孙彦兵 马川义 梁美君 张圣涛 李辉[4] 卢青 Zhang Ning;Sun Yanbing;Ma Chuanyi;Liang Meijun;Zhang Shengtao;Li Hui;Lu Qing(Shandong High-Speed Group Co.,Ltd.,Jinan 250098,China;School of Qilu Transportation,Shandong University,Jinan 250002,China;Shandong Hi-Speed Company Limited,Jinan 250014,China;School of Civil Engineering ShandongUniversity,Jinan250061,China)

机构地区：[1]山东高速集团有限公司,山东济南250098 [2]山东大学齐鲁交通学院,山东济南250002 [3]山东高速股份有限公司,山东济南250014 [4]山东大学土建与水利学院,山东济南250061

出　　处：《市政技术》2023年第12期262-268,共7页Journal of Municipal Technology

摘　　要：以矿渣、脱硫石膏、粉煤灰和水泥为原料,制备了固废基土壤固化剂。通过正交试验和控制变量试验优化了固废基土壤固化剂的配合比,并研究了延迟时间对固化土力学性能的影响规律。结果表明:水泥掺量对固化土无侧限抗压强度影响最大,其次是矿渣∶脱硫石膏,而矿渣∶粉煤灰对固化土无侧限抗压强度影响最小;固废基土壤固化剂的最优配合比为水泥掺量0.3%,矿渣∶脱硫石膏4∶1,矿渣∶粉煤灰3∶1;不同固废基土壤固化剂配合比和掺量下,固化土的无侧限抗压强度均随着延迟时间的延长而降低。最后,通过实际工程验证了该固废基土壤固化剂在施工延迟条件下的可行性。A solid waste based soil solidification agent was prepared by raw materials of slag,desulfurization gyp-sum,fly ash and cement.The mix ratio was optimized through orthogonal tests and controlled variable experiments.And the influence of delay time on the mechanical properties of solidified soil was studied.The results show that the cement content has the greatest impact on the unconfined compressive strength of solidified soil,followed by slag:desulfurization gypsum,while slagifly ash has the smallest impact;The optimal mix ratio is 0.3%cement content,4:1 of desulfurization gypsum for slag and 3:1 of fly ash for slag;Under different ratios and dosages of solid waste based soil solidification agents,the unconfined compressive strength of solidified soil decreases with the extension of delay time.Finally,the feasibility of the agent under delayed construction conditions was verified through practical engineering.

关 键 词：固废基土壤固化剂 正交试验 控制变量试验 无侧限抗压强度 延迟时间 工程验证 

分 类 号：U414[交通运输工程—道路与铁道工程] U416.1