Abstract
Soils are regarded as a mixture which consists of various sizes of grain particles. The stress-strain behavior, therefore, depends on the properties of the particles and its grain size distribution.
The purpose of this study is to predict the strength properties of mixed soils based on the consideration of soil structure. The soil structure is regarded as consisting of skeleton of coarse particles and matrix constituted by fine particles and water. The stress distribution in the mixture is evaluated by using the strain energy of the mixture. The relationship between stress ratio and fine fraction at critical state is derived by using the proposed method. Its validity is confirmed from the triaxial compression test results for two types of the mixtures and other experimental results.
