METHOD FOR PREPARATION OF FIBER-CONCRETE MIXTURE Russian patent published in 2022 - IPC B28B1/52 C04B14/06 C04B14/38 C04B28/04 C04B40/02 

FIELD: construction.

SUBSTANCE: invention relates to the construction, namely to the technology of preparation of fiber-concrete mixtures and products from them, and can be used in the technology of production of products and structures in monolithic construction, in prefabricated construction. The method for preparing a fiber-concrete mixture includes mixing Portland cement, fine aggregate, metal fiber for 5 minutes, the introduction of mixing water, superplasticizer and additional mixing for 5 minutes. The resulting fiber-concrete mixture is placed in the formwork, the fiber–concrete mixture together with the formwork is placed in a DC inductor coil, the inductor performs reciprocating movements along the formwork at a speed of 3-5 m/min, while the magnitude of the magnetic field induction is at least 0.5 T, the processing time is 5 min. The constant magnetic field lines are directed parallel to the desired orientation of the fibers in concrete. At the same time, M400 D20 Portland cement is used as Portland cement. Sand from the Kamsko-Ustinsky deposit is used as a fine aggregate. REMICRETE SP11 additive based on polycarboxylate ether is used as a superplasticizer. The "Chelyabinka" fiber is used with a length of 25 mm, a diameter of 0.35 mm as a metal fiber.

EFFECT: present invention enables to increase the bending strength, density of fiber-concrete products, workability of fiber-concrete mixtures.

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