International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395 -0056 Volume: 03 Issue: 02 | Feb-2016 www.irjet.net p-ISSN: 2395-0072 © 2016, IRJET | Impact Factor value: 4.45 | ISO 9001:2008 Certified Journal | Page 199 Study on flexural strengthening of RC beams using ferrocement laminates with Recron-3S fibre – A Review N.Karunya 1 , R.T.Anitha Ranee 2 , K.Eswaran 3 , Dr.J.Sridhar 4 1 PG student, Department of Civil Engineering, K.S.Rangasamy college of technology, Tamilnadu, India 2 Assistant Professor, Department of Civil Engineering, K.S.Rangasamy college of technology, Tamilnadu, India 3 PG student, Department of Civil Engineering, K.S.Rangasamy college of technology, Tamilnadu, India 4 Professor, Department of Civil Engineering, K.S.Rangasamy college of technology, Tamilnadu, India ---------------------------------------------------------------------***--------------------------------------------------------------------- Abstract - Worldwide a great deal of research is currently being focused on the use of effective material for repair and strengthening of existing reinforced concrete structure and the research is also concern about the effective utilization of fiber in construction industries. This paper reviews seventeen articles of strengthening the reinforced concrete elements with ferrocement laminate. This review paper is mainly concern about the types of meshes, number of layers of meshes, mortar mix ratio, and fibers usage in laminates that are used in the research works to strengthen the reinforced concrete elements. Key Words: ferrocement laminate, Recron-3S, 3 layers of mesh. 1. INTRODUCTION Natural disasters such as earthquakes, tornadoes and tsunami threaten the integrity of civil infrastructures and safety of their uses. A large number of existing reinforced concrete buildings and other structures typically have not sufficient capacity to resist the forces during such catastrophes. In order to guarantee the safety of the people, the older structures need to be repaired and strengthened to prevent their collapse. Efficient methods are needed to be developed for structures repair and strengthening. The ageing of the nation’s infrastructure in a tight economic environment has necessitated the search for innovative and cost effective solutions. In recent years, the use of ferrocement laminate has become a subject of great interest in structural community. Several studies had been focused on the use of externally bonded ferrocement laminates to reinforce existing structures in need of strengthening. In general ferrocement is considered as a highly versatile form of composite material made of cement mortar and layers of wire mesh or similar small diameter steel mesh closely bound together to create a stiff structural form. This material, which is a special form of reinforced concrete, exhibits behaviour so different from conventional reinforced concrete in performance, strength and potential application it must be classed as a separate material. In rationally designed ferrocement structures, the reinforcement consists of small diameter wire mesh in which the proportion and distribution of the reinforcement are made uniform by spreading out the wire mesh throughout the thickness of the element. This distribution of achieving improvements in many of the engineering properties of the material such as fracture, tensile and flexural strength, toughness, fatigue resistance and impact resistance but also provide advantages and novelty of the concept have stimulated what is now considered a worldwide interest in the use of ferrocement. For achieving higher values of specific surface, Number of layers of meshes needs to be increased. Many a time, it becomes difficult to force mortar in this layer. The fine diameter wires, with smaller openings pose more problems. This is over come by using different types of fibres to improve the specific surface of the reinforcement. As the fibre take care of cracking of mortar, bigger diameter wire meshes with larger opening can be used and which simplify the penetration of mortar in the meshes. This results in a high strength material for which flexural properties can be designed and predicted with much accuracy. It also offers higher energy absorption capacity and impact resistance to ferrocrete. Behaviour of such fibre in ferrocement laminates on reinforced beam will be studied in this project which includes flexural test. 1.1 Definition of ferrocement (act 549) Ferrocement is a thin walled concrete commonly constructed of hydraulic cement mortar reinforced with closely spaced layers of continuous and relatively small wire mesh. The mesh may be of metallic or other suitable materials. 2. Literature survey The present investigation deals with studies on utilisation of fibre in ferrocement laminates and its application in flexural strengthening of RC beams, an