COMPOSITE REINFORCEMENT Russian patent published in 2014 - IPC E04C5/07 

FIELD: machine building.

SUBSTANCE: composite reinforcement comprises resin impregnated yarns from fibres, abradant particles are applied onto the reinforcement surface. The yarns are interconnected by twisting around each other and fixing by the hardened resin in this position. Recesses are provided between the yarn turns, fibres of each yarn are stretched in a longitudinal direction of each turn, pressed to each other and twisted around the yarn longitudinal axis so that in the zone of their contact along the whole reinforcement length they form a common screw-like joining course from the hardened resin and the fibres of two yarns. In the cross section the reinforcement is formed by a pair of yarns contacting with each other via the joining course, each of the yarns is oval in the cross section, the cross section area of each yarn is chosen within the range 40-49% of the total area of the reinforcement cross section, the cross section area of the joining course is chosen within the range of 20-2.0% of the total area of the reinforcement cross section. A rough crust made from the conglomeration of the abrasive material particles and hardened resin covers the outer surface of the reinforcement, the crust area in the cross section is chosen within the range of 2-15% of the total area of the cross section of the yarns and the joining course.

EFFECT: improved reinforcement strength and strength of its adhesion to concrete.

1 dwg