Abstract
The main aim of this study is to find the shear resistance capacity of the fiber-reinforced polymer beam with metakaolin. The RC beams used in this work were prepared with the replacement of cement by 35 % metakaolin. The major objective of this study is to understand the overall behavior of metakaolin-based reinforced concrete beams strengthened using fiber-reinforced polymer (FRP) composites. First, several trials were prepared with different dosages of metakaolin, biochar, and eggshell powder for achieving a target cubic compressive strength of 30 MPa. From the developed optimized mix, 12 RC beams were cast and strengthened with different configurations of carbon FRP wrapping. Test results revealed that the RC beam developed with metakaolin and strengthened with full wrapping (CFRP-FW) showed better overall performance in terms of peak strength and ductility. In addition to the experimental program, a detailed non-linear finite element (FE) analysis was performed using the commercial software ABAQUS. The predictions from the FE analyses matched well with the experimental results in terms of peak shear strength and failure patterns. The validated FE model was used for performing a detailed parametric analysis aiming to determine optimum design outputs for external bonding strengthening of metakaolin-based RC beams under shear.
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