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Volume 14
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10.3390/ma14185413
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Article

Durability of a New Thermal Aerogel-Based Rendering System under Distinct Accelerated Aging Conditions

by
Joana Maia
1,*,
Marco Pedroso
2,
Nuno M. M. Ramos
1,
Inês Flores-Colen
2,
Pedro F. Pereira
1 and
Luís Silva
3
1
Institute of R&D in Structures and Construction (CONSTRUCT), Laboratory of Building Physics (LFC), Faculty of Engineering (FEUP), University of Porto, 4200-465 Porto, Portugal
2
CERIS, Civil Engineering Research and Innovation for Sustainability, Instituto Superior Técnico (IST), Universidade de Lisboa (UL), 1049-001 Lisboa, Portugal
3
Saint-Gobain Weber, 3800-055 Aveiro, Portugal
*
Author to whom correspondence should be addressed.
Materials 2021, 14(18), 5413; https://doi.org/10.3390/ma14185413
Submission received: 2 August 2021 / Revised: 31 August 2021 / Accepted: 15 September 2021 / Published: 18 September 2021
(This article belongs to the Special Issue Sustainable Materials for Heritage Retrofitting)
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Abstract

The widespread application of innovative thermal enhanced façade solutions requires an adequate durability evaluation. The present work intends to assess the durability of a new aerogel cement-based rendering system through the adaptation of different accelerated aging cycles, such as heating–freezing, freeze–thawing, and heat–cold. Several mechanical properties and also capillary and liquid water absorptions were tested for uncoated and coated specimens. A decrease in the mechanical strength, especially after freeze–thaw cycles, was observed. However, the water action promoted the late hydration of the cement paste contributing to the densification of the matrix and, consequently, the increase of the adhesive strength. Additionally, a decrease in the dynamic modulus of elasticity and an increase in the Poisson’s ratio were observed after aging, which indicates a higher capacity of the render to adapt to substrate movements, contributing to a reduction of cracking.
Keywords: aerogel; cement-based mortar; thermal render; durability; accelerated aging; experimental test aerogel; cement-based mortar; thermal render; durability; accelerated aging; experimental test

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MDPI and ACS Style

Maia, J.; Pedroso, M.; Ramos, N.M.M.; Flores-Colen, I.; Pereira, P.F.; Silva, L. Durability of a New Thermal Aerogel-Based Rendering System under Distinct Accelerated Aging Conditions. Materials 2021, 14, 5413. https://doi.org/10.3390/ma14185413

AMA Style

Maia J, Pedroso M, Ramos NMM, Flores-Colen I, Pereira PF, Silva L. Durability of a New Thermal Aerogel-Based Rendering System under Distinct Accelerated Aging Conditions. Materials. 2021; 14(18):5413. https://doi.org/10.3390/ma14185413

Chicago/Turabian Style

Maia, Joana, Marco Pedroso, Nuno M. M. Ramos, Inês Flores-Colen, Pedro F. Pereira, and Luís Silva. 2021. "Durability of a New Thermal Aerogel-Based Rendering System under Distinct Accelerated Aging Conditions" Materials 14, no. 18: 5413. https://doi.org/10.3390/ma14185413

APA Style

Maia, J., Pedroso, M., Ramos, N. M. M., Flores-Colen, I., Pereira, P. F., & Silva, L. (2021). Durability of a New Thermal Aerogel-Based Rendering System under Distinct Accelerated Aging Conditions. Materials, 14(18), 5413. https://doi.org/10.3390/ma14185413

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