RAW MATERIAL MIX FOR PREPARATION OF CHEMICALLY STABLE SILICON-CONCRETE OF AUTOCLAVE HARDENING Russian patent published in 1997 - IPC

FIELD: manufacture of building materials; may be used in manufacture of building structures reinforced with common steel (non-acid-resistant) in construction of prefabricated production buildings and structures with chemically aggressive environment without anticorrosive protection and in manufacture of decorative and facing articles for producing of durable facing of buildings in gas-laden atmosphere of the modern industrial cities, roadway coverings, floor plates, etc, instead of articles from natural stones of granite, jasper, quartz sandstone, quarzitic breccia types. SUBSTANCE: mix includes binders in the form of active crystalline modifications of silica or tridymite-cristobalite composition containing 0.1-2 mol.% of alkali metal oxides, and fluid added to mix in the form of aqueous solutions of alkali metal compounds, for instance, 5-15% sodium hydroxide. In manufacture of articles and structures by the common vibratory method of molding the mix contains, mas.%: crystalline modification of silica, 14,3; ground quartz sand, 15.6; common-grade quartz sand, 12.6; crushed rock, 51.7; aqueous solution of sodium hydroxide, 5.8. Besides, in common vibratory molding of articles and structures, the mix contains the following components, mas. %: crystalline modification of silica. 24.8; ground quartz sand, 28,4; common-grade quartz sand, 35.7; aqueous solution of sodium hydroxide, 11.1. EFFECT: reduced power consumption for manufacture of chemically stable articles and structures and their cut down cost. 3 cl