Abstract This research work was carried out to find the impact of Micro Silica [MS] and Polypropylene Fiber [PF] on Ultra-High Performance Geopolymer Concrete [ U-HPGPC]. Totally 20 samples of concrete mixtures were evaluated to determine the compressive strength, workability, split tensile strength and modulus of elasticity. PF were used at different volume fractions [0%, 7.5%,15%, 25% and 35%] and the results were discussed in detail. From the test results it was concluded that when 15% of MS was used in U-HPGPC the mechanical characteristics reduced gradually, but then improved when the percentage was increased above 15% of MS. Additionally, the use of PF contributes to the increase of mechanical characteristics of U-HPGPC but above 2.75% of PF and 15% of MS there was a decrease in strength of U-HPGPC.
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Natarajan et al. (2024) studied this question.
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