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

2021-07Journal article Restricted access
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dc.contributor.authorParracha, João Luís
dc.contributor.authorBorsoi, Giovanni
dc.contributor.authorVeiga, Rosário
dc.contributor.authorFlores-Colen, Inês
dc.contributor.authorNunes, Lina
dc.contributor.authorGarcia, Ana R.
dc.contributor.authorIlharco, Laura M.
dc.contributor.authorDionísio, Amélia
dc.contributor.authorFaria, Paulina
dc.date.accessioned2021-09-15T08:58:15Z
dc.date.available2021-09-15T08:58:15Z
dc.date.issued2021-07
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 chemical-morphological 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.en
dc.description.sponsorshipThe authors acknowledge the support given by the Portuguese Foundation for Science and Technology (FCT) within the research project WGB_Shield (PTDC/ECI-EGC/30681/2017). J.L. Parracha acknowledges FCT for the Ph.D. scholarship (2020.05180.BD). The authors also acknowledge CIN, Saint-Gobain and Secil Martingança for the material supply, Dr. Pedro Nolasco from CQE/IST for the static contact angle tests and Marta Duarte from UPB/LNEC for the fungal tests.en
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationParracha, J.L., Borsoi, G., Veiga, R., Flores-Colen, I., Nunes, L., Garcia, A.R., Ilharco, L.M., Dionísio, A. & Faria, P. (2021). Effects of hygrothermal, UV and SO₂ accelerated ageing on the durability of ETICS in urban environments. "Building and Environment", 204, 108151. DOI:10.1016/j.buildenv.2021.108151en
dc.identifier.doi10.1016/j.buildenv.2021.108151pt_PT
dc.identifier.issn0360-1323
dc.identifier.urihttp://hdl.handle.net/10400.3/6056
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.relation.publisherversionhttps://www.sciencedirect.com/science/article/pii/S0360132321005527pt_PT
dc.subjectETICSpt_PT
dc.subjectDurabilityen
dc.subjectArtificial Ageing Procedureen
dc.subjectSurface Propertiesen
dc.subjectMould Susceptibilityen
dc.subjectSurface Wettabilityen
dc.titleEffects of hygrothermal, UV and SO₂ accelerated ageing on the durability of ETICS in urban environmentsen
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.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FECI-EGC%2F30681%2F2017/PT
oaire.citation.conferencePlaceUnited Kingdomen
oaire.citation.titleBuilding and Environmenten
oaire.citation.volume204pt_PT
oaire.fundingStream3599-PPCDT
person.familyNameRibeiro Nunes
person.givenNameLina Maria
person.identifierA-7169-2013
person.identifier.ciencia-id2515-2AE7-A765
person.identifier.orcid0000-0001-6849-3241
person.identifier.scopus-author-id23006201100
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication00c8e07c-ade7-454f-80be-21e23f36a0f5
relation.isAuthorOfPublication.latestForDiscovery00c8e07c-ade7-454f-80be-21e23f36a0f5
relation.isProjectOfPublication6126ed6b-840e-4e05-aff7-326169ac0601
relation.isProjectOfPublication.latestForDiscovery6126ed6b-840e-4e05-aff7-326169ac0601

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