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Effects of hygrothermal, UV and SO2 accelerated ageing on the durability of ETICS in urban environments

2021Journal article Restricted access
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dc.contributor.authorParracha, João L.
dc.contributor.authorBorsoi, Giovanni
dc.contributor.authorVeiga, Rosário
dc.contributor.authorFlores-Colen, Inês
dc.contributor.authorNunes, Lina
dc.contributor.authorGarcia, Ana
dc.contributor.authorIlharco, Laura M.
dc.contributor.authorDionísio, Amélia
dc.contributor.authorFaria, Paulina
dc.date.accessioned2021-10-29T16:32:26Z
dc.date.available2021-10-29T16:32:26Z
dc.date.issued2021
dc.description.abstractExternal Thermal Insulation Composite Systems (ETICS) have been extensively used for either new constructions or building facades retrofitting in the last decades. These systems can provide improved thermal performance to the building envelope. However, their long-term durability remains a pervasive concern, with some systems presenting relevant anomalies after few years from their application. The durability assessment of ETICS is defined by the EAD 040083-00-0404 guideline, which stated an accelerated ageing procedure based on the hygrothermal and freeze-thaw behaviour. Nevertheless, further important environmental urban conditions, such as UV radiation and atmospheric pollutants, as well as bio-susceptibility, are not envisaged in the guideline. This paper presents the results of an experimental campaign with the aim of evaluating the durability of the rendering system of several commercially available ETICS exposed to an innovative accelerated ageing procedure, which consists of hygrothermal cycles, UV radiation and air pollutants (SO2) exposure. Physical and chemicalmorphological tests were carried out prior and after each ageing cycle in order to evaluate the durability of ETICS. Biological susceptibility to moulds was also assessed. The experimental results showed that both surface hardness and surface gloss decreased after the combined effect of the hygrothermal, UV, and SO2 ageing cycles, whereas an increase of surface roughness was observed. Substantial colour change for all systems after the ageing procedure was observed, confirming aesthetic alteration. Traces of biological growth were detected on the systems after ageing and the contact angle decreased after the hygrothermal cycles, indicating a lower surface hydrophobicity of the systems.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.buildenv.2021.108151pt_PT
dc.identifier.issn0360-1323
dc.identifier.urihttp://hdl.handle.net/10400.1/17273
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationShielding building' facades on cities revitalization. Triple-resistance for water, graffiti and biocolonization of external thermal insulation systems.
dc.relationDurability for sustainability of multilayer rendering systems. ETICS and thermal mortars
dc.subjectETICSpt_PT
dc.subjectDurabilitypt_PT
dc.subjectArtificial ageing procedurept_PT
dc.subjectSurface propertiespt_PT
dc.subjectMould susceptibilitypt_PT
dc.subjectSurface wettabilitypt_PT
dc.titleEffects of hygrothermal, UV and SO2 accelerated ageing on the durability of ETICS in urban environmentspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleShielding building' facades on cities revitalization. Triple-resistance for water, graffiti and biocolonization of external thermal insulation systems.
oaire.awardTitleDurability for sustainability of multilayer rendering systems. ETICS and thermal mortars
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FECI-EGC%2F30681%2F2017/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//2020.05180.BD/PT
oaire.citation.startPage108151pt_PT
oaire.citation.titleBuilding and Environmentpt_PT
oaire.citation.volume204pt_PT
oaire.fundingStream3599-PPCDT
person.familyNameGarcia
person.givenNameAna
person.identifier.ciencia-idB214-EA2D-350A
person.identifier.orcid0000-0001-6289-4554
person.identifier.scopus-author-id7404608764
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
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relation.isAuthorOfPublication.latestForDiscoverye49828e5-432e-46e3-a7fc-2fdbf51a237b
relation.isProjectOfPublicationae94f0b3-7508-4243-848f-95e2a53d0ec8
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