METHOD OF CONCRETE MIX PREPARATION Russian patent published in 2005 - IPC

FIELD: building materials, particularly used for producing concrete structures and articles.

SUBSTANCE: method involves metering quartz sand and components of ash-and-slag-and-alkaline binging material including carbon containing liquid glass and grinded dump ash-and-slag mixture; mixing above materials and forming articles. Liquid glass is produced from large-tonnage crystalline silicon production waste obtained at aluminum smelter, namely of microsilica, and including highly-dispersed carbon mixtures, namely graphite and carborundum with silica modulus n=1, in amount of up to 6-7% by weight. Grinded dump ash-and-slag mixture is obtained by brown coal burning. Ash-and-slag mixture contains 25% of slag component and 75% of ash component and is grinded so that not more that 1% of material is retained on sieve with 0.08 mm openings. The ash component is obtained from combustion of brown coal at heat generating plant. Concrete mix components are taken in the following amounts (% by weight): liquid glass - 13.5-28.2, ash-and-slag mixture - 24.3-55.1, quartz sand - 31.4-54.5. The mix may be hardened under temperature of up to -18°C.

EFFECT: increased frost-resistance and extended range of concrete mix hardening temperatures, simplified process of concrete mix preparation and reduced cost of ready product.

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