PSI - Issue 64

ScienceDirect Structural Integrity Procedia 00 (2024) 000 – 000 Structural Integrity Procedia 00 (2024) 000 – 000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Available online at www.sciencedirect.com ScienceDirect

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 64 (2024) 1435–1443

SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Bio-based self-modulating thermal and moisture buffer mortars for architectural applications SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Bio-based self-modulating thermal and moisture buffer mortars for architectural applications Irene Palomar, Gonzalo Barluenga*, Javier Puentes, Hugo Varela Universidad de Alcalá, Departamento de Arquitectura, C/ Santa Úrsula 8, Alcalá de Henares, 28801-Madrid, Spain Abstract New construction materials for architectural applications need to face environmental impact and energy efficiency issues. Self modulating materials are promising solutions to optimize the energy performance of buildings, by compensating climatic hygro thermal changes. Phase-change materials (PCM) and Superabsorbent polymers (SAP) highlight among bio-based components that can be used to design self-modulating mortars. On one hand, PCM can storage and release thermal energy, modulating heat flow and reducing heating and cooling energy demand. On the other, SAP can help to achieve suitable indoor conditions as they level air humidity and contribute to an evaporative cooling effect. In addition, these polymeric materials can be made from renewable bio-resources, becoming bio-based materials. This paper presents a study reporting materials selection, mortar composition design and experimental tests and procedures used to assess thermal and moisture self-modulating properties of PCM and SAP modified mortars for architectural applications as buffer layers. A pervious cement-lime mixture was designed and different amounts and combinations of two types of SAP (spherical and irregular particle shape) and a microencapsulated PCM were evaluated. Mort ars’ fresh w orkability and setting and hardened physical and mechanical properties, microstructure, thermal (heat conductivity and storage properties) and hygric parameters (water and vapor transport and storage) and long term carbonation were studied. The preliminary results of self-modulating mortars showed that SAP and PCM can increase moisture and thermal properties, enhancing buffer capacities of architectural mortar renderings. © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers Keywords: Bio-based components; phase-change material; super absorbent polymer; self-modulating mortar; moisture and thermal buffer. © 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers Irene Palomar, Gonzalo Barluenga*, Javier Puentes, Hugo Varela Universidad de Alcalá, Departamento de Arquitectura, C/ Santa Úrsula 8, Alcalá de Henares, 28801-Madrid, Spain Abstract New construction materials for architectural applications need to face environmental impact and energy efficiency issues. Self modulating materials are promising solutions to optimize the energy performance of buildings, by compensating climatic hygro thermal changes. Phase-change materials (PCM) and Superabsorbent polymers (SAP) highlight among bio-based components that can be used to design self-modulating mortars. On one hand, PCM can storage and release thermal energy, modulating heat flow and reducing heating and cooling energy demand. On the other, SAP can help to achieve suitable indoor conditions as they level air humidity and contribute to an evaporative cooling effect. In addition, these polymeric materials can be made from renewable bio-resources, becoming bio-based materials. This paper presents a study reporting materials selection, mortar composition design and experimental tests and procedures used to assess thermal and moisture self-modulating properties of PCM and SAP modified mortars for architectural applications as buffer layers. A pervious cement-lime mixture was designed and different amounts and combinations of two types of SAP (spherical and irregular particle shape) and a microencapsulated PCM were evaluated. Mort ars’ fresh w orkability and setting and hardened physical and mechanical properties, microstructure, thermal (heat conductivity and storage properties) and hygric parameters (water and vapor transport and storage) and long term carbonation were studied. The preliminary results of self-modulating mortars showed that SAP and PCM can increase moisture and thermal properties, enhancing buffer capacities of architectural mortar renderings. © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers Keywords: Bio-based components; phase-change material; super absorbent polymer; self-modulating mortar; moisture and thermal buffer.

* Corresponding author. Tel.: +34 91 883 9239. E-mail address: Gonzalo.barluenga@uah.es * Corresponding author. Tel.: +34 91 883 9239. E-mail address: Gonzalo.barluenga@uah.es

2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers 2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers

2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers 10.1016/j.prostr.2024.09.388