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Performance Evaluation of Hybrid Fiber- Self Compacting Reinforced Concrete members

S. Arivalagan

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Concrete structures subjected to dynamic forces such as earthquakes and blast forces, fail without giving sufficient warning as they are not able to absorb energy. Concrete member reinforced with continuous reinforcing bars to withstand tensile stresses and compensate for the lack of ductility and strength. In congested reinforcements self-compacting plays a major role. The introduction of fibers, a new form of binder that could combine Portland cement in the bonding with cement matrices was brought in as a solution to develop concrete in view of enhancing its flexural and tensile strength. Fibers are generally used in one of two forms - short staple randomly dispersed in the cementitious matrix of a bulk structure, or continuous mesh used in thin sheets. In recent years, some attempts to weave synthetic fibers into three-dimensional reinforcements have been made. The principal aim of the study is adding the steel fibre and poly propylene fibre to the self-compacting concrete at a dosage of 1.0% by volume of concrete and to study its behavior and mechanical properties in fresh and hardened stage. For this study, casting of 9 cubes, cylinder and beams for controlled concrete and 27 Cubes, Cylinder and Beams with Fibers (steel and polypropolyne) M30 grade concrete are used for study, the tests were done at an age of 7 days and 28 days. From the study, it was observed that fibers considerably increase the tensile strength and flexural strength with 1% addition. Also the self-compacting concrete with steel and polypropylene fiber possess the properties of self-compacting concrete.

 

 

 

 

 

 

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