Improving physical and mechanical properties of bentonite clay from Navbahar clay deposit

Abstract

Different compositions of mixtures of sand and clay with medium-grade bentonite for molding of critical large parts of a freight car bogie are examined in the article. Different compositions to improve bentonite’s physical and mechanical properties, such as gas permeability and compressive strength with the addition of soda ash, are considered. As a material for the study of sand and clay mixtures were taken quartz sand grade 1K2O2025, medium strength bentonite Navbaharskogo birthplace, and for improving the physical and mechanical properties of bentonite - soda ash. One possible way to increase bentonite's stability at high temperatures is to treat it with sodium-containing powder like soda ash. The treatment is performed by adding soda ash in powder form to dried bentonite. Experimental results are given in the form of tables and diagrams. Experimental studies were carried out in the production conditions of the central plant laboratories at ES “Liteyno-mechanical plant”. The experiments were carried out following the normative documents. The basis of the results was plotted, and the assumed composition of sand and clay mixtures was established.