STRUCTURAL PERFORMANCE OF FIBER REINFORCED SELF COMPACTING CONCRETE (SCC) BEAMS WITH OPENINGS

Senna Varghese, Milu Jacob
International Research Journal of Engineering and Technology (IRJET)   unpublished
In modern building construction, utility ducts and pipes are accommodated in the space above the false ceiling. There will be high stress concentration around the openings due to the implementation of transverse opening in the web. These results in reduction in beam stiffness. Therefore, while providing large openings, the behaviour of the beam must be properly accounted. Most of the cases the conventional concrete cannot completely fill the congested reinforcement around the opening. Hence
more » ... opening. Hence Self-compacting concrete (SCC) can be used in these beams, as it can easily fill those congested reinforcement without any vibration. It also prevents the local cracks around openings. The use of fibres extends its possibilities. The study mainly involves the experimental investigation of compressive strength of cubes to obtain M 30 grade mix. The compressive strength of cubes by varying the percentage of Recron 3s fiber was investigated to obtain the optimum fiber content. The beams were tested by applying point load at one third points under the loading frame, which has a capacity of 50 tons .The first crack load, ultimate load and deflection of the specimens are tested. It was observed that the ultimate capacity was increased up to 11 % for flexure and 10.5% for shear when fiber was added. Also the ductility factor was increased up to 11.58% for flexure and 17.5% for shear when fiber was added. The main objectives included are to obtain a SCC mix corresponding to M30 grade concrete; to study the flexural and shear behaviour of fiber (Recron 3s) reinforced SCC beams with and without openings.
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