Post Doctor Fellow, Urban and Civil Engineering Dept., Ibaraki University, Japan / Lecturer, Civil Eng. Dept., Faculty of Engineering, South Valley University, Aswan, Egypt
Abstract
Recently, controllability is considered as an important concept in a science of concrete construction. In the light of that, if it is possible to guide a system to a certain state (favored condition) by controlling its inputs, the impending question is “what is the appropriate way to find the most efficient method of having this transformation?” One idea gaining much attention lately is that of fiber hybridization. In a hybrid, two or more different types of fibers are rationally combined to produce a composite that derives benefits from each of the individual fibers and exhibits a synergistic response. This paper focuses on the experimental investigation carried out on controllability of R.C. panels behavior modified with optimal fibers hybridization system (hybrid combination of steel and polypropylene fibers) up to a volume fraction of 1.0 %. Strengtheffectiveness on the mechanical properties, namely, compressive and splitting tensile strength as well as the behavior of R.C. panels modified with optimal fibers hybridization system were studied. The results clarify that the optimal fibers hybridization system is seen to enhance the strengtheffectiveness on mechanical properties, the controllability-efficient on R.C. panels behavior as cracking behavior, pre-peak as well as post-peak region of the load–deflection curve, causing an increase in flexural strength and toughness. Thus, the optimal fibers hybridization system has the potential advantages for large-scale use in concrete construction.
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