Mechanical Properties of Ultra-high Performance Concrete Reinforced by Glass Fibers under Accelerated Agin

Ultra-High Performance Concrete (UHPC) is a cementitious composite with fine aggregates and homogeneous matrix high compressive strength excellent durability against aggressive agents. It common to use short steel fibers in the UHPC. Besides, using considerably increases flexural ductility, energy absorption. Using glass UHPC novel technique which improves its mechanical properties it has benefit of being lighter, cheaper than fibers. Furthermore, can be used for thin concrete plates aesthetic purposes. However, reinforced incompatible hydration reaction alkaline environment as damage fibers, so are decreased over long periods. The containing (GF-UHPC) was investigated under three regimes normal curing, autoclave curing plus hot water 50 days (accelerated aging). substitution silica fume by Metakaolin GF-UHPC studied understand after thermal curing. results showed that accelerated aging, behavior specimens become more brittle modulus rupture toughness indices all prismatic decreased, samples 40% lower results. aging increased at least 4% comparison Replacement slightly regard strength.