FLEXURAL STRENGTH PERFORMANCE OF FIBERGLASS REINFORCED CONCRETE
Abstract
This study examined the flexural strength performance of fiberglass-reinforced concrete (FRC), focusing on the effects of fiberglass content and curing duration. Using a mix design of 1:2:3, a water-cement ratio of 0.55, and 12 mm fiberglass strands, beam specimens (150 mm × 150 mm × 450 mm) were cast and cured for 7, 14, and 28 days. Flexural strength tests conducted via third-point loading showed significant improvements with fiberglass addition. The 4% mix outperformed the control (0% fiberglass) by 15%, 22%, and 30% at 7, 14, and 28 days, respectively, achieving maximum strength of 6.98 MPa at 28 days. However, the 6% mix exhibited a performance decline, likely due to reduced workability and uneven fiber distribution. These findings demonstrate the potential of fiberglass reinforcement in optimizing concrete’s structural performance and highlight the importance of maintaining an optimal fiberglass content for balanced workability and strength enhancement.
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