Title:
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Improvement of the durability of concrete with recycled aggregates in chloride exposed environment
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Author:
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Vázquez Ramonich, Enric; Barra Bizinotto, Marilda; Aponte Hernández, Diego Fernando; Valls del Barrio, Susanna; Jiménez, Cristian
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Other authors:
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Universitat Politècnica de Catalunya. Departament d'Enginyeria de la Construcció; Universitat Politècnica de Catalunya. MATCAR - Materials de Construcció i Carreteres |
Abstract:
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Recycled aggregates concrete (RAC) becomes an important participant in recycled materials although there are still questionable properties of it, like chloride penetration and diffusion. An extensive experimental campaign was performed in order to evaluate the effect of recycled concrete aggregates (RCA) over some properties of concretes. Composition and mix design influence on the concrete were studied in mixes ranging from 0.45 to 0.60 w/c ratios, with 0%, 20%, 50% and 100% coarse aggregates replacement. Concretes were submitted to saline attack and the total chloride contents were determined as well as the chloride penetration profiles. Both new cement paste and RCA from different concrete mixes were analysed by XRD and SEM in order to evaluate the chlorides binding. A chloride binding phenomenon is detected in RAC which may compensate the RCA higher permeability. According to chloride diffusion results, high RCA content lead to an improvement of durability in RAC with sufficiently low w/c ratio, in terms of chlorides presence. |
Abstract:
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Peer Reviewed |
Subject(s):
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-Àrees temàtiques de la UPC::Edificació::Materials de construcció::Nous materials de construcció -Recycled products -Aggregate (Building materials) -Durability -Chlorides binding -Chlorides diffusion -Recycled aggregate concrete -Recycled concrete aggregate -Service life -Productes reciclats -Àrids (Materials de construcció) |
Rights:
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Document type:
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Article - Published version Article |
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