Q. Are glass fibers a proven reinforcement in concrete?

There is extensive testing ongoing with both HD and HP fibers. Currently available are test data from Twin Cities Testing Laboratories (TCTL) and an Arizona State University research report.

The test data show that:

• HD and HP fibers in 1/2" and 3/4" lengths at a dosage level of 1 pound per cubic yard meet the requirements of ICC ES AC32 for both plastic shrinkage and secondary reinforcement.
• The compressive strength of HD and HP reinforced concrete exceeds that of plain concrete by approximately 15%. Additional research is underway to identify how this happens. Nycon believes it relates to the ability of the HD and HP fibers to dramatically modify the micro-macro crack formation which improves the soundness of the concrete.

Information on AR-glass chemical stability is available upon request from Nycon.

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