摘要
对冻干法制备的广西膨胀土不扰动样进行了微结构测试研究。通过压汞试验结果对膨胀土的孔隙分布进行分形研究表明其具有多重分维特征。对孔隙分布曲线拐点的物理意义进行了探讨,并用扫描电镜照片加以印证,认为可将膨胀土的孔隙划分为大、小、微3类,其中微孔隙为蒙脱石类晶层之间的宽度可变间隙。说明压汞试验无法提供微孔隙的信息,建议今后应重视膨胀土全孔隙分布的研究。
The microcosmic structure of the undisturbed soil sample done by lyophilization is tested. The distribution of pore size of Guangxi expansive soil are studied on the basis of fractal geometry by the result of mercury intrusion porosimetry; and the distribution of pore size is multifractal. The physical meaning of the inflexion of the curve is discussed; the result is confirmed by the photos of scanning electron microscope. The pore of expansive soil is sorted into the pore of soil group, the pore of particle in the soil group and the pore of montmorillonite crystal. The information of microcosmic pore cannot be gained by mercury intrusion porosimetry; the whole distribution of the pore size of expansive soil should be much accounted of.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2006年第1期155-158,共4页
Rock and Soil Mechanics
关键词
膨胀土
分形
多重分形
孔隙分布
expansive soil
fractal
multifractal
pore distribution
作者简介
杨洋，男，1980年生，博士研究生。从事膨胀土性质方面的研究。
