Abstract: In recent Fiber Reinforced Polymers (FRP) is being introduced in a wide variety of civil engineering applications. This material is also used for strengthening of reinforced concrete structures. Strengthening of concrete structure is required for increasing the capacity of the structural members to sustain additional loads caused due to change in live load, design error, age of structure etc. The strengthening of concrete with CFRP wrapping seems to improve strength of concrete. Methods for strengthening include FRP wrapping, concrete jacketing etc. Strength of RC structure components are found to be reduced, before the service period is over due to several causes. These structures require strengthening to improve its capacity, hence the FRP wrapping is carried out. FRP wrapping is done from one layer to no. of layers as per the strength requirement of the structure. In this study experiment is carried out on M20 and M25 grade concrete. Total 60 cubes are moulded out of which 12 are control specimens and 48 cubes of which 24 cubes of M20 concrete and 24 of M25 concrete. Total 24 cubes include 6 of 50% distress, 6 of 60% distress for GFRP and same for CFRP for M20 concrete. Same set of 24 cubes were moulded and distressed for M25 concrete. Distressing was done with respect to average compressive strength of control specimens. All distressed Cubes were tested under CTM after FRP wrapping. The test results reveals that the strength of distressed concrete wrapped with GFRP and CFRP was found to be increased from 24% to 63% as compared to conventional concrete M20 grade. Similarly for conventional concrete of M25 grade the compressive strength was found to be increased from 12% to 32% when wrapped with GFRP and CFRP.
Keywords: Compression Compressive strength, Glass Fiber Reinforced Polymer (GFRP), Carbon Fiber Reinforced Polymer (CFRP), Compression Testing Machine (CTM)
| DOI: 10.17148/IARJSET.2019.6812