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The present work, aims to improve the properties of fresh and hardened self-compact mortar (SCM) containing hybrid Polypropylene-carbon fiber. The hybrid fiber added as a percentage 0.1%, 0.5% and 1% by volume of self-compact mortar, five different mixture of 100-0%, 70-30%, 50-50%, 30-70% and 0-100% for every fibers ratios (Polypropylene to carbon). The effect of hybrid fiber on some physical and mechanical properties of (SCM) was also investigated as a compressive strength and modulus of rupture, which was examined at ages of 28 days. Results showed that the best added of hybrid fiber (50 P.P-50 C.F) % increased compressive strength with ratio 32%, so increased modulus of rupture for self-compact mortar with ratio 130% at hybrid fiber (0 P.P-100 C.F) %, also indicated that the added improve hard characteristic and decrease of fresh characteristic as a flow time, mini slump flow and specific gravity, when the volume fraction 0.5% and 1% for all hybrid fiber exceeded the limits of the standard because the largest flow time is 11 seconds.

Effect of Hybrid Polypropylene - Carbon Fiber on Self-Compacting Mortar