HEAT-RESISTANT SLAG FIBRE CONCRETE Russian patent published in 2024 - IPC C04B28/04 

FIELD: construction materials.

SUBSTANCE: invention relates to special heat-resistant concretes intended for use in conditions of elevated temperatures, as well as low (negative temperatures) environments. Heat-resistant slag fibre concrete is made from a concrete mixture containing Portland cement, aggregate, fibre, filler, superplasticizer, and water. Washed quarry sand and screenings of crushed blast stone sized 0-5 mm, as a fibre - basalt fibre with a fibre length of 1.8-2 cm, as a filler - ground granulated blast furnace slag with a specific surface of 4500 cm²/g, as a superplasticizer - a superplasticizer based on modified lignosulphonates in the following ratio components, wt.%: Portland cement CEM I 42.5 N - 17.83; washed quarry sand - 25.10; screening of blast furnace crushed stone sized 0-5 mm - 37.07; the specified ground granulated slag - 5.35; basalt fibre - 0.5; the said plasticizer - 0.5; water - 13.65.

EFFECT: creation of new structural heat-resistant slag fibre concrete with the properties ensuring heat resistance at temperatures up to 800°C, without loss of concrete strength after 28 days, ensuring cyclic operation of structures exposed to high and low ambient temperatures, as well as their operation under exposure to an aquatic environment, while simultaneously reducing the cost of manufacturing heat-resistant slag fibre concrete through the use of blast furnace slag.

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