Volume 19 No 9 (2021)
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ENHANCING STRENGTH IN PLAIN CEMENT CONCRETE BEAMS USING FIBER-REINFORCED POLYMER COMPOSITES
Vamsi Krishna Kondisetti, Narendra Avula, Mallikarjuna Rao Chennuboina, Raja
Abstract
Fibre reinforced polymer wraps, covers, and sheets are now the subject of extensive study for their potential use in the protection and preservation of urban populations. Treatment with fiber-reinforced polymer (FRP) has shown to be an excellent way for restoring and strengthening ageing structures. FRP repair solutions provide a cost-effective alternative to standard repair methods and materials. Glass fibre reinforced polymer (GFRP) sheets have been used to examine the flexural and shear behaviour of regular beams. Cement footings constructed remotely were tested to failure using a balanced two-point approach with GFRP sheets strengthened with epoxy. There were three sets of samples produced for this randomised controlled trial. One weak flexure cube was used as a control, while two others were cast and strengthened with continuous sheets of glass fibre reinforced polymer (GFRP) in SET I. Using continuous glass fibre reinforced polymer (GFRP) sheets, SET II enhanced the shear properties of two of the shear-weak cylinders and regulated the behaviour of the third. Three flexure-weak prisms were cast in SET III; one served as the controlled beam, while the other two were reinforced with glass fibre reinforced polymer (GFRP) sheets. Various quantities and configurations of GFRP sheets and resins are used to reinforce or repair the samples. In addition, tensile strength is measured after casting twelve cylinders, one of which serves as a control, and retrofitting three more cylinders with glass fibre reinforced polymer (GFRP) sheets.
Keywords
Fibre reinforced polymer wraps, covers, and sheets are now the subject of extensive study for their potential use in the protection and preservation of urban populations.
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