The physical-mechanical and structural properties of boulder days of the Vistula Glaciation in the area of Poland

Abstract

In the light of the investigations, it has been found that the boulder clays of Pomeranian and Leszno phases have not generally reached the full consolidation. In most cases, illite is the main clay mineral, and in few cases it is montmorillonite. The physical properties (specific density, volume density, natural water content, liquid limit, plastic limit, soaking and swelling) and the mechanical properties (angle of the internal friction, cohesion) of both types of boulder clays are very much alike, and at the same time these parameters are lower than in the boulder clays of the older glaciations.