Machanical properties of cohesive soils in dependence on the water quantity and mineralogical composition

V prispevku je pojasnjeno razmerje med vsebnostjo vode, mineraloškimi in mehanskimi lastnostmi zasičenih glin. Ugotovitve, ki temeljijo na teoretični analizi, so bile potrjene eksperimentalno, na monomineralnih vzorcih glin. Ugotovljeno je bilo, da je količina medzrnske vode, ki določa nedrenirano strižno trdnost in stisljivost glin, sestavljena iz proste porne vode in trdno adsorbirane vode na zunanje površine glinenih zrn. Količina proste pornevode je za različne zasičene gline pri enaki nedrenirani strižni trdnostiin enaki efektivni napetosti po konsolidaciji enaka, prav tako pa tudidebelina vodnega filma okoli glinenih zrn. Celotna količina trdno adsorbirane vode je odvisna od specifične površine glin. Rezultat tega dela jeanalitično podana odvisnost med vsebnostjo vode in mehanskimi lastnostmi glin ob upoštevanju njihovih mineraloških značilnosti.This article explains the relationships between the water content, mineralogical properties and mechanical properties of saturated clays. The findings are based on theoretical analysis and were confirmed experimentally on monomineral clay samples. It was found that the quantity of intergrain water, which determines the undrained shear strength and compressibility of clays, consists of free pore water, and the firmly adsorbed water on the external surfaces of the clay grains. The free water quantity is the same for different saturated clays, at the same undrained shear strength, and same effective stress after consolidation and, likewise, the thickness of the water film around the clay grains. The total quantity of firmly adsorbed water depends on the specific surfaces of the clays. The result of this work is a new analytical formulation that gives the relationship between the water content and the mechanical properties of clays, taking into account their mineralogical characteristics