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Q. Will fiber-reinforced concrete have a hairy appearance? A. Fiber-reinforced concrete can develop a "hairy" appearance if fibers are not uniformly distributed or if the finishing process is not done correctly. Certain types of fibers are more prone to protruding from the surface after finishing. Proper finishing techniques, such as using a vibrating highway float before troweling, are essential to achieve a smooth and aesthetically pleasing surface. Performing a finishing trial or mockup prior to placement can also help the contractor gain experience and ensure the desired surface appearance is achieved. While fibers can influence the appearance of the surface, proper mix design, placement, and finishing techniques can minimize or eliminate the "hairy" effect. The goal is to ensure fibers are well-distributed and embedded within the concrete matrix, preventing them from protruding on the surface. References: ACI 544.1R, ACI 544.3R Topics in Concrete: Concrete Fundamentals, Fiber Reinforced Concrete
Q. Will fiber-reinforced concrete have a hairy appearance?
A. Fiber-reinforced concrete can develop a "hairy" appearance if fibers are not uniformly distributed or if the finishing process is not done correctly. Certain types of fibers are more prone to protruding from the surface after finishing. Proper finishing techniques, such as using a vibrating highway float before troweling, are essential to achieve a smooth and aesthetically pleasing surface. Performing a finishing trial or mockup prior to placement can also help the contractor gain experience and ensure the desired surface appearance is achieved.
While fibers can influence the appearance of the surface, proper mix design, placement, and finishing techniques can minimize or eliminate the "hairy" effect. The goal is to ensure fibers are well-distributed and embedded within the concrete matrix, preventing them from protruding on the surface.
References: ACI 544.1R, ACI 544.3R
Topics in Concrete: Concrete Fundamentals, Fiber Reinforced Concrete