Bond behavior between steel reinforcement and recycled concrete |
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| Authors: | Sindy Seara-Paz Belén González-Fonteboa Javier Eiras-López Manuel F Herrador |
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| Affiliation: | 1. School of Building Engineering, Department of Construction Technology, University of A Coru?a, E.U. Arquitectura Técnica, Campus Zapateira s/n, 15071, La Coru?a, Spain
2. School of Civil Engineering, Department of Construction Technology, University of A Coru?a, E.T.S.I. Caminos, Canales y Puertos, Campus Elvi?a s/n, 15071, La Coru?a, Spain
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| Abstract: | In this paper the bond behavior of recycled aggregate concrete was characterized by replacing different percentages of natural coarse aggregate with recycled coarse aggregate (20, 50 and 100 %). The results made it possible to establish the differences between the conventional concrete bond strength and the recycled concrete bond strength depending on the replacement percentage. It was thus found that bond stress decreases with the increase of the percentage of recycled coarse aggregate used. In order to define the influence of recycled aggregate content on bond behavior, normalized bond strength was calculated taking into account the reduced compressive strength of the recycled concretes. Finally, using the experimental results, a modified expression for maximum bond stress (bond strength) prediction was developed, taking into account replacement percentage and compressive strength. The obtained results show that the equation proposed provides an experimental value to theoretical prediction ratio similar to that of conventional concrete. |
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