FIRE-PROOF CONCRETE COMPOSITION Russian patent published in 2015 - IPC C04B35/66 

FIELD: metallurgy.

SUBSTANCE: fire-proof concrete composition includes a fire-proof filler based on aluminium oxide, high-alumina cement, a complex additive, an organic and/or metallic fibre and modifying additives; with that, the complex additive consists of microsilica, chrome oxide and a finely dispersed aluminous component, namely reactive alumina and/or corundum with dispersion ability of not more than 0.063 mm and/or calcined alumina, which have been taken in the ratio of (1-3):(1-4):(6-9), at the following content of components in concrete composition, wt %: fire-proof filler - 71-92, high-alumina cement - 2-5, complex additive - 5-21, organic and/or metallic fibre - 0.01-2, and modifying additives - 0.1-1.1.

EFFECT: increasing high-temperature strength properties at bending, at high slag resistance and heat resistance.

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