High-Srength Fiber Reinforced Concrete Utilizing Closely Spaced Reinforcing Bars

Abstract

CRC (Compact Reinforced Composite) is the designation for a special type of fiber reinforced concrete with high strength ( 150-400 MPa) and closely spaced reinforcing bars. The dense matrix with water/powder ratios of typically 0.16 provide a good bond to fibers and reinforcing bars, and the large ·content of steel fibers provide the ductility necessary for utilizing reinforcement effectively. The steel fiber content is typically 2-6% by volume and the content of reinforcing steel is 2-10% by volume. The improved durability of the matrix due to a high micro silica content makes it possible to use a concrete cover to the reinforcement of only 10 mm in aggressive environments, improving the effectiveness of the reinforcement.