【摘要】 针对目前淤泥固化土存在稳定性差、遇水易软化、低掺量固化剂的强度贡献率低等问题，提出以水泥、石灰、硅酸钠和硫酸钙等材料作为复合固化剂，同时引入不同粒径、不同掺量普通砂作为骨架基体材料，改良固化土的整体结构，提高固化效果，试验以液塑限、颗分、强度和微观等为判别指标，探索引入骨架结构对固化土的微观机理。试验结果表明：骨架基体材料的引入，改善了疏浚淤泥的颗粒级配，形成了“粒状-镶嵌-胶结”结构，使得固化土强度增长明显，其强度与骨架基体粒径、掺量成正相关，而液塑限、塑性指数与粒径、掺量成反比关系，总体上骨架基体材料对固化土改善效果明显，对疏浚淤泥固化改良在工程中的应用具有指导意义。更多还原

【Abstract】 At present,stabilized soil’s stability is still poor,and it softens easily in water,and its strength is low with low curing agent dosage. This paper put forward a way to improve stabilized soil’s solidification effect by adding the materials such as cement,lime,sodium silicate,calcium sulfate and so on,while mixing different grain diameters and amounts of ordinary sand. It studied the liquid-plastic limit,granulometric distribution,unconfined compressive strength,and microstructure to explore the curing mechanism. The test results show that skeleton structure material can improve the particle size distribution of dredged silt,and form the structure of granular-mosaic-cement. The increase of strength is in direct proportion to the skeleton material’s particle size and amount. On the contrary,the liquid-plastic-limit and plasticity index are inversely proportional. In a word,skeleton material helps to improve the curing effect,and this is more instructive in practical applications.更多还原