Bentonite clays of the Central Kyzylkum and their material composition and engineering and geological properties, Uzbekistan

The authors consider the conditions of occurrence, composition, and properties Eocene clays Paleogene, common in northern part Tamdytau, which were foundation structures. present study is aimed at studying problem long-term interaction with water identifying features changes their material composition properties; variability clays, reasons for these are analyzed. main factors determining differences Paleogene are: genetic - different salinity sea basin or less saline reservoirs connected open sea; zonal-climatic humidity other physical properties. So far, no unified methodology has been developed predicting base structures when interacting water. results granulometric analysis established that classified as highly dispersed soils containing more than 55% clay particles. Analysis diffraction pattern showed fraction studied samples contain montmorillonite (M), hydromica (H), kaolinite (K), mixed-layer formations montmorillonite-hydromica series.