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Evaluation of sustainable structural concrete using recycled aggregate and aramid fiberboard

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Document pages: 9 pages

Abstract: The purpose of this study is to evaluate the flexural behavior of recycled aggregate concrete beams strengthened with aramid fiber sheets. The compressive strength of concrete with recycled aggregate is usually similar to or slightly lower than that of ordinary concrete. In order to improve the compressive strength, aramid fiber sheet was used in this study. In this study, the structural properties of concrete beams prepared with recycled aggregate and reinforced aramid fiber board at different positions were investigated. A concrete beam was tested as the control sample. The concrete beam was prepared with 30 recycled aggregate and 70 natural aggregate, and the other three reinforced beams (U-shaped reinforced beams at the bottom, bottom and side, bottom and both ends) were tested. The ultimate load is increased by 3.01 , 39.88 , and 100.79 for bottom, bottom and sides, bottom and both ends with U-shaped strengthened beams. The ductility ratios are 2.75~6.20 for strengthened beams. The experimental results showed that the strengthening system with U-shaped band controls the premature debonding and provides a more ductile failure mode than the strengthening system without U-shaped bands. It can be found that the ultimate strength of H40-RGA30-BS specimen based on load-deflection curves shows most promising result. The experimental results are compared with the analytical results of nonlinear flexural behaviors for strengthened reinforced recycled aggregate concrete beam.

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