CERAMSITE CONCRETE ON MODIFIED CERAMSITE GRAVEL Russian patent published in 2012 - IPC C04B38/08 C04B14/12 C04B20/02 

FIELD: chemistry.

SUBSTANCE: invention relates to production of construction materials and specifically to production of ceramsite concrete mixtures and concrete based on said mixtures. The ceramsite concrete on modified ceramsite gravel contains cement and water. The ceramsite modifier is 1-3% aqueous hydrofluoric acid solution in amount of 10-12% of the weight of ceramsite, which is used to treat the surface of ceramsite gravel for 5-15 minutes before preparation of the concrete mixture. The ceramsite gravel used is activated by powdering dolomite flour, which makes up 2-3% of the weight of ceramsite during calcination at temperature 1000-1100°C.

EFFECT: high compression strength without increasing average density and higher adhesion of ceramsite to hardened cement paste.

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