ABSTRACT
A mechanical behavior of expansive soil like bentonite variously changes depending on the pore fluid condition. It is well known that the electrical/chemical phenomena on the surface of the clay mineral crystal affects the macroscopic behavior. However, a mechanical model considering such surface phenomena is few in geotechnical engineering. In this study, a method considering the interlaminar behavior of clay mineral, which is governed by the electrical/chemical force and mechanical force, in a general constitutive model is proposed. Several element tests on expansive clay are simulated by the proposed model. Simulations show the proposed model can reasonably and uniformly represent a typical behavior of expansive clay.
