Strength and Behavior of Hybrid Fiber-Reinforced Geopolymer Concrete Columns Under Uniaxial Compression

An experimental investigation is conducted on the blended GGBS with fly ash-based geopolymer concrete. In this investigation, it is aimed to know the mechanical properties of the geopolymer concrete as well as the crushing strength of the short columns under monotonically increasing uniaxial compressive loading. The short columns are casted with the incorporation of steel and polypropylene fibers by hybridization of fibers in the ratios of 0.5, 1, 1.5, 2% along with longitudinal reinforcement. Conventional reinforced columns of the same geometry and same strength are also casted and tested to make a comparison between GPC and conventional RCC to know the behavior under uniaxial loading. The possible effects of volume fraction of fibers are studied. The experimental results are validated with analytical equation proposed for conventional reinforced cement concrete short columns. A good agreement is achieved between experimental and analytical results.