Thermal performance of building envelopes with structural layers of the same density: Lightweight aggregate concrete versus foamed concrete

dc.contributor.authorStrzałkowski, Jarosław
dc.contributor.authorSikora, Pawel
dc.contributor.authorChung, Sang-Yeop
dc.contributor.authorAbd Elrahman, Mohamed
dc.date.accessioned2021-03-22T10:21:53Z
dc.date.available2021-03-22T10:21:53Z
dc.date.issued2021-03-15
dc.description.abstractThis study presents a comparative analysis of the effects of lightweight aggregate concrete (LWAC) and foamed concrete (FC), with dry densities of 500, 750 and 1000 kg/m3, on the thermal performance of a typical multi-family (residential) building. Typical two-layer walls consisting of an essential layer (LWAC or FC), with an insulating layer of foamed polystyrene were evaluated. To ensure fixed U values for all variants tested, the thicknesses of the support layers were adjusted accordingly, in such a way that in each variant the load-bearing layer had the same value of the thermal resistance, thus ensuring the same thermal transmittance value for the entire wall. Calculations were made for four different climate zones, making it possible to determine the impact of each variant used, in different climatic conditions. For a hot climate, the data for Cairo (Egypt) was used. A moderate, warm climate was represented by Vienna (Austria), a moderate cold climate by Kołobrzeg (Poland) and a cold climate by Tromsoe (Norway). Significant correlations between the type/density of concrete and climate zones were established. The study shows that, despite comparable densities and thermal conductivity values between LWAC and FC, their specific heat and thus dynamic thermal properties are different. Study provides valuable guidelines and knowledge on choice between proper lightweight concrete type depending on the climate zone. Meaningful conclusions were drawn, showing that the pursue for developing the material with “the lowest” thermal conductivity itself is not the key factor to develop a residential building with satisfactory thermal comfort.en
dc.description.sponsorshipEC/H2020/841592/EU/Ultra-Lightweight Concrete for 3D printing technologies/Ultra-LightCon-3Den
dc.identifier.eissn1873-684X
dc.identifier.issn0360-1323
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/12885
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-11686
dc.language.isoenen
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subject.ddc620 Ingenieurwissenschaften und zugeordnete Tätigkeitende
dc.subject.otherlightweight concreteen
dc.subject.otherultra-lightweight concreteen
dc.subject.otherlightweight aggregate concreteen
dc.subject.otherfoamed concreteen
dc.subject.otherthermal performanceen
dc.subject.otherbuilding envelopesen
dc.titleThermal performance of building envelopes with structural layers of the same density: Lightweight aggregate concrete versus foamed concreteen
dc.typeArticleen
dc.type.versionacceptedVersionen
dcterms.bibliographicCitation.articlenumber107799en
dcterms.bibliographicCitation.doi10.1016/j.buildenv.2021.107799en
dcterms.bibliographicCitation.journaltitleBuilding and Environmenten
dcterms.bibliographicCitation.originalpublishernameElsevieren
dcterms.bibliographicCitation.originalpublisherplaceAmsterdam [u.a.]en
dcterms.bibliographicCitation.volume196en
tub.accessrights.dnbfreeen
tub.affiliationFak. 6 Planen Bauen Umwelt>Inst. Bauingenieurwesen>FG Baustoffe und Bauchemiede
tub.affiliation.facultyFak. 6 Planen Bauen Umweltde
tub.affiliation.groupFG Baustoffe und Bauchemiede
tub.affiliation.instituteInst. Bauingenieurwesende
tub.publisher.universityorinstitutionTechnische Universität Berlinen
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