FRACTAL MODEL FOR PORE STRUCTURE OF CEMENT STABILIZED SOIL

Pore structure characteristics directly affect the permeability,deformation,and strength properties of soils. Quantitative analysis of pore structure characteristics of soils has always been a difficult problem in soil mechanics. Pore structure characteristics of cement-stabilized soils are used to explain the reinforcement mechanism. The total pore volume and pore distribution of different pore diameters of cement-stabilized soil are measured quantitatively through the mercury injection experiment in this paper. The effects of cement content,age,moisture content,and dry density on the median and average pore diameters of cement-stabilized soil are analyzed,and the reinforcement mechanism of cement-stabilized soil is revealed. Based on the mercury intrusion test results of cement-stabilized soil,a fractal model of pore distribution of cement-stabilized soil is established. The relationship between the fractal dimension of the pore-size distribution and the cement content,age,moisture content,and dry density of cement-stabilized soil is analyzed.