METHOD TO PREPARE NANOMODIFIER FROM INDUSTRIAL WASTES FOR CONCRETE MIXTURE Russian patent published in 2013 - IPC C04B24/24 B82B3/00 

FIELD: construction.

SUBSTANCE: in the method to prepare a powdery nanomodifier for a concrete mixture, including mixing of a plasticiser and a mineral component in a mixer of cyclic action and their further grinding in an activator, the plasticiser is a hyperplasticiser on the basis of polycarboxylates, the mineral filler is a mixture of siftings from crushing of broken concrete and microsilica in the weight ratio of 3:1, and when preparing the nanomodifier, the specified hyperplasticiser and the mineral component in amounts of accordingly 2-3 wt % and 97-98 wt % are mixed in the mixer of cyclic action for 1-2 minutes, and grinding is carried out in an industrial activator with a vertical working chamber of AKRK series to produce a powdery nanomodifier with nanoparticle size of less than 100 nm in amount of 5-7 wt %, dusty parties with size from 100 nm to 100 mcm 20-25% and particles with size from 100 to 300 mcm - balance.

EFFECT: concrete strength improvement.