Considering the close relationship among the arrangement and the size of structure unit and deformation and strength of soil, three quantitative indices to evaluate the microstructure directionality of cohesive soil are put forward, such as, mean direction angle α , directional angle and coefficient of two dimensional shapes R i : Through the information obtained from the SEM photo by means of computer, the quantitative test method of microstructure of cohesive soils is presented, a...
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