METHOD TO PREPARE FIBROUS MATERIAL TO REINFORCE CONCRETE Russian patent published in 2012 - IPC E04C5/00 

FIELD: construction.

SUBSTANCE: in the method to prepare concrete-reinforcing fibrous material, which provides for its soaking in an aqueous solution of alkaline metal, soaking is carried out for 1-48 hours, before or after cutting of the reinforcing fibrous material into sections with length of 5-100 mm, in an aqueous solution of Na₃PO₄ or Na₂C₂O₄, or NaJO₃ with subsequent drying to moisture of not more than 10%.

EFFECT: elimination of lump-forming capacity and cohesion of fibrous material and production of concrete with isotropic properties, which is resistant to corrosion.