GB317919A - Method of producing cements, building, plastering and coating materials from mud or the like - Google Patents

Abstract

317,919. Kolloidchemie Studienges., Carpzow, J. B., March, M., Lenzmann, R., and Sanders, H. May 30, 1928. Plastic compositions containing mud.-Cements, building, plastering and coating materials are formed by causing fresh mud containing unsaturated silicon compounds, or the colloidal constituents separated therefrom, to react, preferably in the absence of air, with finely divided metal oxides or other compounds other than chalk or lime. Bacterial nutrients and anaerobic bacteria cultures may be added to the mud to increase its activity. The mud, or separated colloids, prior to being mixed with the other compounds may be dried, preferably in the absence of air, at temperatures below 80‹C. so as to maintain substantially the colloidal structure and unsaturated state. In examples (1) 100 parts of mud are mixed with 20 parts of aluminium sulphate, allowed to stand for 24 hours, dried and ground. The product may be mixed with cement and mortar for making slabs and as plastering and coating material. (2) 100 parts of mud are mixed with 10 parts of an oxide of chromium, cobalt or titanium, are dried after 24 hours calcined at 800‹C. and powdered. The product can be used for colouring lime sandstone. (3) A cement is formed by mixing 100 parts of mud, 20 parts of powdered bauxite and 10 parts of barium sulphate, storing for some time in absence of air, air drying, calcining at 800‹C. and grinding. (4) 100 parts of mud, 20 parts of kaolin and 20 parts of furnace slag are mixed, air dried and pulverized. The powder is mixed with an aqueous solution of alkaline silicates or of fluoric compounds for use as a liquid cement or as a mouldable composition. Examples are given in which magnesium, iron and calcium sulphates, magnesium chloride, pyrolusite. talc and ferric oxide are combined with the mud.