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dc.contributor.authorVázquez Ramonich, Enric
dc.contributor.authorBarra Bizinotto, Marilda
dc.contributor.authorAponte Hernández, Diego Fernando
dc.contributor.authorJiménez Fernández, Cristian Gonzalo
dc.contributor.authorValls del Barrio, Susanna
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria de la Construcció
dc.date.accessioned2015-04-17T18:50:44Z
dc.date.created2013
dc.date.issued2013
dc.identifier.citationVazquez, E. [et al.]. Improvement of the durability of concrete with recycled aggregates in chloride exposed environment. A: International Conference on Sustainable Construction Materials and Technologies. "The Third International Conference on Sustainable Construction Materials & Technologies - SCMT3". Kyoto: 2013.
dc.identifier.urihttp://hdl.handle.net/2117/27452
dc.description.abstractRecycled aggregates concrete (RAC) becomes an important participant in recycled materials, although there are still questionable issues about some of its properties. Durability of RAC and its relationship with recycled concrete aggregate (RCA) is often discussed, especially in relation with chloride penetration and diffusion properties. An extensive experimental campaign was performed in order to evaluate the effect of RCA content in the retention and diffusion of chlorides in RAC. The influence of composition and mix design of the concrete was first studied using only a 20% replacement of natural aggregate by recycled aggregate. The 20% replacement was chosen in order to comply with Spanish recommendations for structural concrete. The 20% replacement was chosen in order to comply with Spanish recommendations for structural concrete. In the second part of the study concrete mixes ranging from 0.45 to 0.65 w/c ratios, with 0%, 20%, 50% and 100% coarse aggregates replacement were tested. Cement pastes, recycled aggregates and concretes were submitted to saline attack and the total chloride contents were determined. Chloride penetration profiles were determined by means of the NT BUILD 443 specifications. XRD and SEM aided the chlorides binding determination. A chlorides retention phenomenon is detected by the average diffusion coefficient decrease in RAC, thus compensating the RCA higher permeability. According to chloride binding and diffusion results, high RCA content lead to an improvement of durability in RAC with sufficiently low w/c ratio, in terms of chlorides attack.
dc.language.isoeng
dc.subjectÀrees temàtiques de la UPC::Enginyeria civil::Materials i estructures::Materials i estructures de formigó
dc.subject.lcshConcrete--Service life
dc.subject.lcshAggregates (Building materials)--Recycling
dc.subject.otherDurability
dc.subject.otherChlorides Binding
dc.subject.otherChlorides Diffusion
dc.subject.otherRecycled Aggregate Concrete
dc.subject.otherRecycled Concrete Aggregate
dc.titleImprovement of the durability of concrete with recycled aggregates in chloride exposed environment
dc.typeConference report
dc.subject.lemacFormigó -- Durabilitat
dc.subject.lemacÀrids (Materials de construcció) -- Reciclatge
dc.contributor.groupUniversitat Politècnica de Catalunya. MATCAR - Materials de Construcció i Carreteres
dc.relation.publisherversionhttp://www.claisse.info/2013%20papers/data/e413.pdf
dc.rights.accessRestricted access - publisher's policy
local.identifier.drac15582557
dc.description.versionPostprint (published version)
dc.date.lift10000-01-01
local.citation.authorVazquez, E.; Barra, M.; Aponte, D.F.; Jimenez, C.; Valls, S.
local.citation.contributorInternational Conference on Sustainable Construction Materials and Technologies
local.citation.pubplaceKyoto
local.citation.publicationNameThe Third International Conference on Sustainable Construction Materials & Technologies - SCMT3


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