EFFECT OF DISJOINING PRESSURE OF HYDRATED FILMSON THE STRENGTH PROPERTIES OF CLAY
The article considers the effect of disjoining pressure of hydrate films enveloping mineral particles on the strength properties of clay. A method for determining the value of the disjoining pressure of hydrate films is proposed. The regularities of its variation were studied depending on the moisture content in clays on the basis of experimental studies. The reaction to the external stress of adsorption (α) and diffusive (β) layers of hydrate films is described for different types of structural contacts and the nature of friction at the contacts. The effect of disjoining pressure of hydrate films on the shear stress is shown. The methodology for determining the actual effective strength of clay soils has been developed. This methodology permits us to evaluate not only the external impacts on clay soil, but also the stress at its structural contacts.