Abstract
This study evaluates the possibility of measuring the damage of the recycled concrete. In this way, two conventional concretes with a w/c ratio of 0.55 and 0.65 were designed. Based on them, six recycled concretes with different percentages of replacement of natural coarse aggregates with recycled coarse aggregate (20, 50 and 100%) were obtained. To take into account the high absorption capacity of the recycled aggregates, before using them they were pre-wetted for 10 min. The results concluded that scalar damage mechanics (based on the variations of the elastic modulus) and volumetric strains curves can be use to quantify the damage of the recycled concrete. The results from both approaches indicated that the damage to concrete depended on the percentage of replacement, increasing with higher replacement percentages. Additionally, values of the damage, that are quantified using the critical stress and according to the scalar damage mechanics, are given.
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Acknowledgments
This study is part of the project entitled “3.2-358/2005/3-B: An experimental study on the use of RCDs in recycled concrete used in structural applications (RECNHOR)”, financed by the Spanish Environmental Ministry. In order to go on with this line of research, a new project has been given to the group. It belongs to the program CENIT (Spanish Ministry of Industry) and is called “Clean, efficient and nice construction along its life cycle (CLEAM)”.
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González-Fonteboa, B., Martínez-Abella, F., Eiras-López, J. et al. Effect of recycled coarse aggregate on damage of recycled concrete. Mater Struct 44, 1759–1771 (2011). https://doi.org/10.1617/s11527-011-9736-7
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DOI: https://doi.org/10.1617/s11527-011-9736-7