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Eco-friendly healing agents for recycled concrete

2018-11Documento de conferência Acesso aberto
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dc.contributor.authorGarcia-Gonzalez, Julia
dc.contributor.authorFreches, André Correia
dc.contributor.authorLemos, P. C.
dc.contributor.authorPereira, Maria Alice Santos
dc.contributor.authorJuan-Valdes, Andres
dc.contributor.authorMoran-del Pozo, Julia
dc.contributor.authorGuerra-Romero, Manuel Ignacio
dc.contributor.authorFaria, Paulina
dc.contributor.institutionLAQV@REQUIMTE
dc.contributor.institutionDQ - Departamento de Química
dc.contributor.institutionUCIBIO - Applied Molecular Biosciences Unit
dc.contributor.institutionDEC - Departamento de Engenharia Civil
dc.coverage.spatialMadrid
dc.date.accessioned2019-03-08T23:26:24Z
dc.date.available2019-03-08T23:26:24Z
dc.date.issued2018-11
dc.description.abstractAbstract An innovative option to extend the service life of construction and building materials is the use of bio-healing agents. This study was focused on assessing the protection and consolidation effect of eco-friendly healing agents by analysing the water absorption of recycled concrete. A recycled concrete with 50% replacement of natural coarse aggregate by construction and demolition waste (CDW) aggregate and a similar recycled concrete in which, additionally, the Portland cement was replaced by recycled cement (with 25% ceramic waste) were biotreated by healing agents. These agents were obtained by using waste biomass of two different mixed microbial cultures from polyhydroxyalkanoates production processes. Results have shown that biotreatments decreased the water absorption significantly, more evident in concrete samples with both recycled cement and aggregates than on the other type of concrete. Resumen Una innovadora posibilidad planteada para prolongar la vida útil de los materiales de construcción y edificación es el uso de agentes bioreparadores. Este estudio se centró en la evaluación del efecto protector y consolidante de agentes reparadores y respetuosos con el medio ambiente mediante el análisis de la absorción de agua del hormigón reciclado. Un hormigón reciclado con sustitución del 50% de los áridos gruesos naturales por residuos de construcción y demolición (RCD) y un hormigón reciclado similar en el cual, además, se sustituyó el cemento convencional Portland por cemento reciclado (con 25% de residuo cerámico) fueron biotratados con agentes reparadores. Estos agentes se obtuvieron en el proceso de producción de polihidroxialcanoatos utilizando biomasa residual de dos cultivos microbianos mixtos diferentes. Los resultados mostraron que los biotratamientos disminuyen significativamente la absorción de agua del hormigón, siendo más eficaces en las muestras de hormigón que combinan cemento y árido reciclado que en el otro tipo de hormigón.en
dc.description.versionauthorsversion
dc.description.versionpublished
dc.format.extent8
dc.format.extent212150
dc.identifier.isbn978-84-941820-8-2
dc.identifier.otherPURE: 11691776
dc.identifier.otherPURE UUID: d4db9327-720b-4809-bdb2-7451217c0c1d
dc.identifier.otherORCID: /0000-0001-6094-0107/work/63725833
dc.identifier.otherORCID: /0000-0003-0372-949X/work/64041600
dc.identifier.urihttp://hdl.handle.net/10362/62739
dc.language.isoeng
dc.peerreviewedyes
dc.publisherCastineira Libreria Tecnica / Consejo Superior de Investigaciones Cientificas - Instituto de Ciencias de la Construccion Eduardo Torroja
dc.subjectconstruction and demolition waste
dc.subjectceramic waste
dc.subjectsurface healing
dc.subjectrecycled cement
dc.subjectmixed microbial culture
dc.subjectbiotreatment
dc.subjectwater absorption
dc.subjectrecycled aggregate
dc.titleEco-friendly healing agents for recycled concreteen
dc.typeconference object
degois.publication.firstPage1
degois.publication.lastPage8
degois.publication.titleProceedings of AEC 2018 - International Conference on Construction Research / Eduardo Torroja - Architecture, Engineering and Concrete
degois.publication.titleInternational Conference on Construction Research / Eduardo Torroja - Architecture, Engineering and Concrete
dspace.entity.typePublication
rcaap.rightsopenAccess

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