Fiber-reinforced concrete in precast concrete applications:
Research leads to innovative product
Abstract:
Fiber-reinforced concrete (FRC) is a composite mate- rial made of hydraulic cement or cements; water; fine and coarse aggregate; and short, uniformly dispersed discontinuous fibers. Fibers may be of steel, glass, polymeric materials, carbon, cellulose, and so forth, and their lengths vary from 3 to 64 mm (0.12 to 2.52 in.). The diameters may vary from a few μm to about 1 mm (0.04 in.). The sections may be round, oval, polygonal, triangular, crescent shaped, or even square depending on the manufacturing process and the raw material used. The two broad categories of fibers are micro and macro. Microfibers have diameters or equivalent diameters less than 0.3 mm (0.012 in.), and macrofibers have diameters or equivalent diameters greater than 0.3 Credit union order mm. The equivalent diameter of a fiber is the diameter of a round fiber having the same cross-sectional area A as the fiber in question, that is, 4A/ π .