摘要
将性能优异的纳米SiO_2和纳米Al_2O_3混合共掺应用于滩涂淤泥固化土的强度改性。通过室内试验,探讨了不同龄期、不同纳米矿粉掺入比时标准养护、不同浓度SO_4^(2-)溶液和海水养护条件下的水泥固化土的无侧限抗压强度变化规律,分析了纳米矿粉对水泥固化土强度的改善效果以及抗侵蚀能力。试验结果表明,标准养护条件下,混合掺入纳米SiO_2和纳米Al_2O_3后,各龄期的固化土强度均不同程度提升;纳米矿粉表现出了良好的抗硫酸盐侵蚀效果,当纳米矿粉的掺入比较大时,不同浓度SO_4^(2-)溶液养护条件下的固化土强度反而出现一定程度的增长;海水养护使得固化土强度明显降低,而掺入纳米矿粉后,起到了良好的抗侵蚀效果,掺入比较大时,固化土的中后期强度提高更加明显。研究结果为高含水率淤泥的固化处理以及侵蚀性环境下固化土桩的应用问题奠定了试验研究基础。
Nanometer SiO2 and nanometer Al2O3 with excellent performance are simultaneously applied to strength improvement of cemented beach clay. On the basis of abundant experiments,the unconfined compressive strength（UCS） variations of the cemented clay with different curing ages and different nanometer mineral powder ratios are analyzed under three curing conditions,and strength improvement effect and erosion resistance of the nanometer mineral powder on the cemented clay are discussed. The experimental results show that the UCS of the cemented clay mixed with nanometer SiO2 and Al2O3 of different curing ages has increased under the standard curing condition; the nanometer mineral powder is excellent to resist sulfate erosion,and the UCS of the cemented clay under different concentration of SO4^2- solution has a certain degree of growth when the nanometer mineral powder ratios are larger; the seawater have a remarkable impact on UCS of the cemented clay,but the strength after adding nanometer mineral powder is improved obviously. The research will provide experimental research basis for solidification treatment of high moisture content clay and application of solidified soil pile under erosion environment.
作者
王文军
刘志明
汪鹏飞
陈勇
冯亚娇
Wang Wenjun;Liu Zhiming;Wang Pengfei;Chen Yong;Feng Yajiao(Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China;College of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China)
出处
《工程勘察》
2018年第5期1-5,21,共6页
Geotechnical Investigation & Surveying
基金
宁波市自然科学基金项目(2017A610308)
宁波市科技创新团队项目(2011B81005)
关键词
纳米矿粉
侵蚀性环境
滩涂淤泥固化土
无侧限抗压强度
抗侵蚀作用
nanometer mineral powder
corrosive environment
cemented beach clay
unconfinedcompressive strength （UCS）
erosion resistance
作者简介
王文军（1975-），男（汉族），陕西扶风人，博士，副教授．
