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Flexural behavior of corroded reinforced recycled aggregate concrete beams

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Document pages: 14 pages

Abstract: Recycled concrete not only reduces the use of untreated aggregate, but also reduces the pressure of landfill. Therefore, recycled coarse aggregate (RCA) is widely recommended for new construction projects. However, the flexural properties of corroded reinforced recycled aggregate concrete (RAC) beams are uncertain. The purpose of the experimental study in this paper is to study the flexural properties of corroded reinforced concrete beams and corroded reinforced natural aggregate concrete (NAC) beams, so as to explore the possibility of using RAC beams in corrosive environment. Four different RCA percentages (0 , 33 , 66 and 100 ) and two different concrete strengths (C30 and C60) are the main influencing factors in the total mass of coarse aggregate in concrete mixture parameters. The electrochemical method was adopted to accelerate steel corrosion. Full-scale tests were performed on eight simply supported beams until the failure load was reached. Comparison of load-deflection behavior, crack patterns, failure modes, ductility, and ultimate flexural capacity of corroded reinforced NAC and RAC beams was made based on the experimental results obtained. The comparison results show that the flexural behavior of corroded reinforced RAC beams with an appropriate percentage of RCA is satisfactory compared to the behavior of NAC beams.

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