EFFECT OF CURING REGIMES ON THE ENGINEERING PROPERTIES OF HYBRID FIBER REINFORCED CONCRETE

Abstract

In this study, the effects of curing regimes on the engineering properties of hybrid fiber reinforced concrete were investigated experimentally. Three type conventional concrete mixtures with no fiber, fiber and hybrid fiber having almost same slump value were designed. Later, specimens produced from these concrete mixtures were exposed to different curing conditions namely standard 23±2 °C water, sealed and air curing regimes. After 7 and 28 curing days, the mechanical tests were carried out to determine compressive, splitting tensile, flexural strength and ultrasonic pulse velocity. Also, the flexural performance of concrete specimens was determined by four-point bending test. Finally, the concrete specimens cured in water had the best mechanical properties and energy absorption capacity while those of concrete specimens cured in air were the worst. The specimens cured in sealed condition had similar mechanical properties compared to the specimens cured in water. Moreover, the deflection-hardening response was observed in all fiber reinforced concrete specimens.

Keywords

• Macro Steel Fiber,Micro Steel Fiber,Curing Conditions,Deflection-hardening response,Engineering properties

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