METHOD OF COMPOSITE MATERIAL PRODUCTION Russian patent published in 2014 - IPC C04B40/00 C04B38/00 B28B1/08 

FIELD: chemistry.

SUBSTANCE: method of producing a composite material consists in the fact that a cavity of a casing construction is filled with very rigid concrete, produced by mechanic activation of a cement composition. The cement composition includes 30% of cement of grade PC-500DO-N, 7.5% of microsilica, 1.8% of an expanding additive EA-H, 20% of river washed sand with the fineness modulus Mf 5, 40% of basalt gravel with a size up to 30 mm, 0.7% of an ethylene glycol-based superplasticiser. Mechanic activation is carried out in blade mixers of a forced type with a frequency of blade rotation not less than 60 rpm for not less than 20 min. Highly-strong concrete is poured into the cavity of the casing construction, and is simultaneously consolidated by vibration processing. Then, to exclude steam discharge from it, the cavity of pouring is closed. Autoclave solidification of concrete, consisting in the fact that the entire construction is evenly heated to a temperature of nearly 200°C to solidify it, is realised. The construction is exposed to the said temperature for 12 hours. After that, it is gradually cooled to room temperature and kept at the said temperature until complete hydration of cement takes place. And, finally, mechanical processing of basic surfaces is realised.

EFFECT: simplification of technology of the material production.

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