Wednesday, August 3, 2011

3. Synthetic fiber


Synthetic fibers specifically engineered for concrete are manufactured from man-made materials that can withstand the long-term alkaline environment of concrete. Synthetic fibers are added to concrete before or during the mixing operation. The use of synthetic fibers at typical addition rates does not require any mix design change.

Why use?


Synthetic fibers benefit concrete in both the plastic and hardened states. Some of the benefits include:
® Reduced plastic settlement cracks
® Reduced plastic shrinkage cracks
® Lowered permeability
® Increased impact and abrasion resistance
® Increased shatter resistance
Some synthetic fibers may be used as secondary reinforcement (Hardened Concrete Performance Documentation required).


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