REINFORCING FIBER AND ITS APPLICATION FOR REINFORCING CONCRETE

摘要

1. A strand of reinforcing glass fibers containing several separate glass fibers coated with a sizing composition, said sizing composition comprising at least one silane binder, a polyurethane film-forming agent containing blocked isocyanate, and water, characterized in that said polyurethane film-forming agent, containing blocked isocyanate is present in said sizing composition in an amount of from about 25 wt% to about 75 wt% (solids content) of the total solid composition. A fiberglass reinforcing strand according to claim 1, wherein said polyurethane film-former containing blocked isocyanate is selected from a polyurethane film-former containing blocked isocyanate and a polyurethane film-former containing blocked isocyanate. ... A fiberglass reinforcing strand according to claim 1 or 2, characterized in that the removal of the blocking groups from said polyurethane film-forming agent containing the blocked isocyanate occurs at a temperature that ensures the simultaneous or almost simultaneous removal of the blocking groups and curing of said polyurethane film-forming agent. A strand of reinforcing fiberglass according to any one of paragraphs. 1 and 2, characterized in that the removal of blocking groups from said blocked isocyanate occurs at a temperature of 107.2 ° C (225 ° F) to 176.7 ° C (350 ° F). 5. A strand of reinforcing fiberglass according to claim 4, characterized in that