International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395 -0056 Volume: 04 Issue: 05 | May -2017 www.irjet.net p-ISSN: 2395-0072 © 2017, IRJET | Impact Factor value: 5.181 | ISO 9001:2008 Certified Journal | Page 3017 STRUCTURAL PERFORMANCE OF FIBER REINFORCED SELF COMPACTING CONCRETE (SCC) BEAMS WITH OPENINGS Senna M Varghese 1 , Milu Mary Jacob 2 1 P.G.Student, Department of Civil Engineering, Saintgits College of Engineering, Kerala, India 2 ABSTRACT - 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 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. Key Words: SCC, Recron 3S, ductility ratio, stiffness, stress-concentration. 1. INTRODUCTION Self compacting concrete (SCC) or self levelling concrete or self consolidating concrete is a mix of a concrete with very low yield stress, good segregation résistance, high deformability and also moderate viscosity. External compaction is not provided for this type of concrete. SCC is less labour-intensive compared to the conventional concrete mixes and in terms of its setting time and gaining strength it is similar to standard concrete. SCC mix is obtained by limiting the coarse aggregate content and its maximum size and to use lower water-powder ratios together with super plasticizers. The main disadvantages of SCC are its cost, associated with the use of chemical admixtures and use of high volumes of Portland cement. One of the best methods to reduce the cost is the use of mineral additives such as limestone powder, natural pozzolanas, fly ash and slag. Recron 3 s is a type of polypropylene monofilament short fiber, which is used in concrete for the purpose of control and arrest cracks. This fiber reduces rebound splattering of concrete .also it reduces wastage of mortar and speeds up the space of work. They also have the capacity to increase the tensile strength. Its importance increases when plastering is in progress at higher floors, ceilings and outside surfaces of the buildings. Many researchers have worked on fresh properties of self compacting concrete. 2. MATERIAL CHARACTERISTICS (a) Cement: In this research Portland Pozzolona cement (ultra tech cement) was used and its properties are shown below in table 1 Asst.Professor, Department of Civil Engineering, Saintgits College of Engineering, Kerala, India ----------------------------------------------------------------------***----------------------------------------------------------