摘要
采用压汞法对疏浚淤泥流动固化土进行了微观孔隙结构的研究,分析了固化土的孔隙体积及入口孔径分布特征与固化材料掺量及固化土龄期的关系,并将微观试验结果与固化土的物理指标和强度特性进行了比较。结果表明,采用压汞法研究疏浚淤泥流动固化土的微观孔隙空间分布是成功的,压汞试验得到的微观孔隙特征与众多学者通过宏观力学试验得出的强度规律是一致的,微观结构试验能够很好地解释宏观物理力学性状。随着固化材料掺量的增加和龄期的增长,淤泥固化土的孔隙体积和D50孔径明显减小,入口孔径分布特征亦发生了相应变化。所得流动固化土的入口孔径主要分布在0.01～10μm之间,最大分布孔径在0.5～2μm之间。
Microstructure of the flow-solidified soil of dredged clays was studied by mercury intrusion porosimetry（MIP）.The influences of the solidification agent content and curing time on the volume and entrance pore size of the voids was analyzed.The relationship between the MIP results and macroscopic behavior was compared;and the results demonstrated that the MIP is successful and the microstructure characteristics is adequate to be used to explain the macro-mechanical properties.The volume of the voids and D50 changed markedly with the solidification agent content and curing time;and the entrance pore size changed correspondingly.The distribution range of the entrance pore diameters of the flow-solidified soils are mainly from 0.01 ？m to 10 ？m;and the maximum distribution diameters are mainly from 0.5 ？m to 2 ？m.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2011年第12期3591-3596,3603,共7页
Rock and Soil Mechanics
基金
国家高技术研究发展计划863项目(No.2007AA11Z135)
江苏省南水北调工程科技创新项目(No.KJCX-201003)
关键词
疏浚淤泥固化土
压汞试验
入口孔径分布
微观结构与宏观特性
solidified soil of dredged clays
mercury intrusion porosimetry
entrance pore size distribution
microstructure and macro-behavior
