METHOD TO PREPARE CONCRETE MIXTURE Russian patent published in 2012 - IPC C04B28/00 B28C5/00 C04B111/20 

FIELD: construction.

SUBSTANCE: in the method to prepare a concrete mixture, consisting in mixing of cement, fillers, superplasticiser and mixing water, previously cement, fillers and a part of mixing water are mixed at the shop to produce a concrete mixture with slump of 2-4 cm, then the produced mixture is transported to a construction site, where a water solution of superplasticiser with remaining amount of mixing water is added in it not later than 2 hours from the moment of preparation, and the concrete mixture is finally mixed for at least 3 minutes.

EFFECT: improved convenience of laying, preservation of concrete mix mobility without reduction of concrete strength during all hardening times.

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