摘要
针对高有机质滩涂海相淤泥力学性能差、采用水泥等传统胶凝材料固化效果不理想及高能耗的问题,依托具体工程开展不同配方体系的水泥基固化剂和新型矿物基固化剂在不同养护方式下的固化效果对比试验,通过分析比较不同类型固化试样的无侧限抗压强度的增长规律,探讨两类固化剂材料对固化高有机质滩涂海泥的适用性,进一步结合固化机理分析和工程应用实践,优选出适用于高有机质滩涂海泥固化的短龄期、高强度、绿色环保的胶凝材料。结果表明:SS-W-S新型矿物基胶凝材料通过一系列水化胶凝产物的包裹、粘结、锚固等作用,使淤泥中的细小颗粒团粒化,形成稳定的骨架结构,使固化淤泥最终成为具有一定强度和稳定性的整体结构,可有效替代传统水泥基固化剂,实现高有机质滩涂海泥的早强固化;在6%掺量下,SS-W-S新型矿物基胶凝材料3天即可实现有效固化,且固化土体强度是同掺量下PO42.5普通硅酸盐水泥的3倍以上。通过实际工程的大规模应用,验证了SS-W-S矿物基固化剂对于滩涂海泥良好的适用性。本文成果可为高有机质滩涂海泥的原位固化施工提供参考。
To solve the problems of poor mechanical properties of high organic mudflat marine sludge,and unsatisfactory curing effect and high energy consumption of traditional cementitious materials such as cement,comparative tests on curing effects of cement-based curing agents and new mineral based curing agents with different formula systems under different curing conditions are carried out based on the specific project.By analyzing and comparing the growth patterns of unconfined compression strength of different types of solidified specimens,the applicability of two types of curing agent materials to the solidification of high organic mudflat sludge is discussed,and then the solidification mechanism analysis and engineering application practice is further conducted,so as to elect the short age,high strength,environment-friendly curing agent which is suitable for the solidification of high organic mudflat sludge.The results show that the new type of SS-W-S mineral based curing agent can agglomerate the fine particles in the sludge and form a stable skeleton structure through a series of functions such as wrapping,bonding and anchoring of hydration products,so that the solidified sludge can finally become an integral structure with certain strength and stability,which can effectively replace the traditional cement-based curing agent,and realize the early-strength solidification of high organic mudflat marine sludge.The mudflat sludge can be effectively solidified by the SS-W-S new mineral based curing agent at the 6%dosage in three days,and the strength of solidified soil is more than three times that of PO42.5 ordinary Portland cement at the same dosage.Then it's verified that SSW-S mineral based curing agent has good applicability to mudflat marine sludge by large-scale application in the practical engineering.The results can provide references for the in-situ solidification of high organic mudflat marine sludge.
作者
李盼盼
李镜培
范立登
Li Panpan;Li Jingpei;Fan Lideng(Department of Geotechnical Engineering,Tongji University,Shanghai 200092,P.R.China;Anhui Rong Gong Bo Da Environmental Protection Technology and Materials Research Institute Co.,LTD,Ma'anshan,Anhui 243000,P.R.China)
出处
《地下空间与工程学报》
北大核心
2025年第1期159-170,共12页
Chinese Journal of Underground Space and Engineering
关键词
高有机质
滩涂海相淤泥
SS-W-S矿物基固化剂
早强
绿色环保
high organic matter
mudflat marine sludge
SS-W-S mineral based curing agent
early-strength
environment-friendly
作者简介
李盼盼(1996-),男,河南周口人,博士生,主要从事地基处理与基础工程方面的研究工作。E-mail:lipanpan0822@126.com;通讯作者:李镜培(1963-),男,江西信丰人,博士,教授、博士生导师,主要从事岩土力学及桩基础工程等领域的教学与研究工作。E-mail:lijp2773@tongji.edu.cn。
