Splitting- and Direct-Tensile Strengths of Ambient Cured Geopolymer Concrete with Glass Fibers

In this paper, an experimental program was undertaken to investigate the splitting-tensile strength and the direct-tensile strength of geopolymer concrete reinforced with glass fibers (GCGF). The compressive strength, splitting-tensile strength and direct-tensile strength of plain geopolymer concrete (GC) and GCGF at 28 days were determined. Test results highlighted that the incorporation of glass fibers into geopolymer concrete decreased the compressive strength by approximately 4.3%. On the other hand, the splitting-tensile strength and the direct-tensile strength of geopolymer concrete increased by approximately 5.6% and 7.7%, respectively, with the incorporation of glass fibers. The splitting-tensile strength and the direct-tensile strength of both GC and GCGF were on average 7.9% and 5.3% of their compressive strengths, respectively.