EN 998-1 performance requirements for thermal aerogel-based renders

Soares, António O.; Júlio, Maria de Fátima; Flores‐Colen, Inês; Ilharco, Laura M.; Brito, Jorge de

doi:10.1016/j.conbuildmat.2018.05.197

Cited by 21 publications

(18 citation statements)

References 23 publications

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“…This indicates the influence that a small number of mortars with higher values can present. It is also possible to see that, as already known [25,69], these mortars tend to present lower mechanical performance than current cement-based mortars, which seems associated with the inclusion of the nanomaterial silica aerogel [99]. Something that is also noted is the need for an increased w/p ratio when compared to conventional cement-based mortars [100], which can also influence their physical and mechanical performance due to an increased porosity.…”

Section: Discussion Of the Uni And Bivariate Analysismentioning

confidence: 78%

“…Moreover, the industrial-based formulations, which present the highest mechanical properties, tend to present lower performance in terms of thermal behaviour. The insertion of silica aerogel is associated with the lowest λ, but at the same time strongly related to lower mechanical performance, probably due to an increased water need, to the fragility of the aerogel and to some interfacial weakness between this nanomaterial and the matrices [25,[68][69][70].…”

Section: Discussion Of the Pca And Factor Analysismentioning

confidence: 99%

“…Research works (laboratory) Silica aerogel [25,[65][66][67][68][69][70][71][72][73] S1 to S9 Research works (semi-industrial) Silica aerogel with others [25,[66][67][68][69] I1 to I21 Industrial product (industrial) EPS, cork, perlite, silica aerogel [74][75][76][77][78][79][80][81][82][83][84] Although all calculation procedures being widely known and easily found in statistics literature [85,86], their implementation using statistical software makes its analysis more complete. Therefore, all data was inserted into an Excel data matrix.…”

Section: L1 To L5mentioning

confidence: 99%

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Nanomaterials’ Influence on the Performance of Thermal Insulating Mortars—A Statistical Analysis

et al. 2020

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This research provides a statistical analysis of the mechanical and physical properties of thermal insulating mortars developed in the laboratory and by the industry with and without the incorporation of nanomaterials. This was evaluated by carrying out a uni and bivariate analysis, principal components and factor analysis, cluster analysis, and the application of regression models. The results show that it is possible to find associations between these mortars’ properties, but also how these formulations’ development can be approached in the future to achieve better overall performance. They also show that the use of nanomaterials, namely silica aerogel, significantly improved the mortars’ thermal insulation capabilities, allowing us to obtain mortar formulations with thermal conductivities below the values presented by classic thermal insulating materials. Therefore, with this investigation, other researchers can support their product-development choices when incorporating nanomaterials to reduce mortars’ thermal conductivities, increasing their production efficiency, overall multifunctionality, and sustainability.

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Section: Discussion Of the Uni And Bivariate Analysismentioning

confidence: 78%

Section: Discussion Of the Pca And Factor Analysismentioning

confidence: 99%

Section: L1 To L5mentioning

confidence: 99%

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Nanomaterials’ Influence on the Performance of Thermal Insulating Mortars—A Statistical Analysis

et al. 2020

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“…There are already several studies that address the properties and performance of renders with incorporation of thermal insulating aggregates, from physical to mechanical properties [16,19,23,43,[49][50][51][52][53][54][55]. However, there is still a lack of knowledge on the durability of these renders that may become a barrier for the implementation of these thermal renders such as silica aerogel-based render [44].…”

Section: Introductionmentioning

confidence: 99%

Durability of Thermal Renders with Lightweight and Thermal Insulating Aggregates: Regranulated Expanded Cork, Silica Aerogel and Expanded Polystyrene

Morgado

Soares

Flores‐Colen

et al. 2021

Gels

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Following the trend of energy-efficient construction, renders with thermal insulation properties have been studied for replacing conventional renders. However, there are still few studies on the durability of these renders that may become a barrier for their implementation. In this study, the performance of lightweight renders for thermal insulation to accelerated aging cycles and freeze/thaw cycles is discussed. For this purpose, renders with regranulated expanded cork (GEC), silica aerogel (SA), and expanded polystyrene (EPS) were produced and tested for compressive strength, ultra-sound velocity, Young’s modulus, and thermal conductivity before and after accelerated aging cycles (hygrothermal, IR and freeze/thaw cycles). With this study, a comparison between the influence of different aggregates on renders is carried out in order to understand their effect on different properties of renders.

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“…To improve the thermal behaviour of buildings, different products incorporating lightweight aggregates with low density and thermal conductivity have appeared on the market. Thermal renders and plasters continue to awaken the interest of the researchers (Borges, Flores-Colen, and de Brito, 2018;Nosrati and Berardi, 2018;Soares, de Fátima Júlio, Flores-Colen, Ilharco, and Brito, 2018;Westgate, Paine, and Ball, 2018).…”

Section: Introductionmentioning

confidence: 99%

Development of an Integrated Durability Assessment Methodology of Thermal Mortars Applied in Multi-layer Systems

Maia¹,

Ramos²,

Veiga³

2020

XV International Conference on Durability of Building Materials and Components. eBook of Proceedings

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A gap in the durability assessment of thermal mortars applied in multi-layer systems was observed. The existing standardisation for the durability assessment of hardened mortars does not include a consistent evaluation of thermal coatings applied in multilayer systems, which motivated the development of a new durability assessment methodology. The determination of the physical, hygrothermal and mechanical properties allowed deepening the knowledge of thermal mortars, contributing to develop more reliable simulations. The existing durability methodologies applicable to one-coat mortars and those applicable to thermal multilayer systems (such as ETICS-External Thermal Insulation Composite Systems) are suitable to be adapted to thermal rendering and plastering systems since they present some similar characteristics. The methodology takes into account the material characteristics and specific requirements, such as the application and climatic conditions. The knowledge of these parameters allows the definition of representative accelerated ageing cycles of the relevant degradation mechanisms. The combination of existing procedures with hygrothermal simulation allowed the development of accelerated ageing cycles, taking into account the European climatic context. The existing procedures allowed analysing several degradation mechanisms, but the fixed parameters are not transversal to different climates. The developed methodology allows a realistic durability evaluation since the ageing cycles are adapted to thermal mortars and real climate conditions, contrary to the existing standardised procedures.

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EN 998-1 performance requirements for thermal aerogel-based renders

Cited by 21 publications

References 23 publications

Nanomaterials’ Influence on the Performance of Thermal Insulating Mortars—A Statistical Analysis

Nanomaterials’ Influence on the Performance of Thermal Insulating Mortars—A Statistical Analysis

Durability of Thermal Renders with Lightweight and Thermal Insulating Aggregates: Regranulated Expanded Cork, Silica Aerogel and Expanded Polystyrene

Development of an Integrated Durability Assessment Methodology of Thermal Mortars Applied in Multi-layer Systems

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