Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Deformation recovery of reinforced concrete beams made with recycled coarse aggregates
Highlights Recycled aggregate content has a greater influence on concrete deflections than strains. Large permanent deflections have been detected in recycled concrete. Recycled concrete displays an ability to recover from instantaneous deflections similar to that of conventional concrete. Recycled concrete displays lower recoverability of long-term deformations than conventional concrete. Tension stiffening and effective flexural stiffness is lower in recycled concrete than in the conventional.
Abstract The purpose of this research is to analyse the long-term deformations of reinforced concrete beams made of recycled coarse aggregates (RCA), using four different replacement ratios, 0%, 20%, 50% and 100%. For said purpose, three different loading stages were carried out: firstly, loading and sustained load for 1300 days, secondly, unloading and recovery where the deformations were registered over a one year period, and lastly, testing the concrete beams up to failure in order to analyse the effect of recycled aggregates on pre-cracked concrete members. The results led to the analysis of deformations under sustained load, as well as those produced after removing the load and the performance of pre-cracked members, while identifying the effect of recycled coarse aggregates on concrete performance in terms of plastic deformation, recoverability and concrete stiffness, and also on structural design.
Deformation recovery of reinforced concrete beams made with recycled coarse aggregates
Highlights Recycled aggregate content has a greater influence on concrete deflections than strains. Large permanent deflections have been detected in recycled concrete. Recycled concrete displays an ability to recover from instantaneous deflections similar to that of conventional concrete. Recycled concrete displays lower recoverability of long-term deformations than conventional concrete. Tension stiffening and effective flexural stiffness is lower in recycled concrete than in the conventional.
Abstract The purpose of this research is to analyse the long-term deformations of reinforced concrete beams made of recycled coarse aggregates (RCA), using four different replacement ratios, 0%, 20%, 50% and 100%. For said purpose, three different loading stages were carried out: firstly, loading and sustained load for 1300 days, secondly, unloading and recovery where the deformations were registered over a one year period, and lastly, testing the concrete beams up to failure in order to analyse the effect of recycled aggregates on pre-cracked concrete members. The results led to the analysis of deformations under sustained load, as well as those produced after removing the load and the performance of pre-cracked members, while identifying the effect of recycled coarse aggregates on concrete performance in terms of plastic deformation, recoverability and concrete stiffness, and also on structural design.
Deformation recovery of reinforced concrete beams made with recycled coarse aggregates
Seara-Paz, Sindy (Autor:in) / González-Fonteboa, Belén (Autor:in) / Martínez-Abella, Fernando (Autor:in) / Eiras-López, Javier (Autor:in)
Engineering Structures ; 251
23.10.2021
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Deformation Recovery of Reinforced Concrete Beams Made With Recycled Coarse Aggregates
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