Author(s):
Lisci, Carla ; Galhano, Carlos ; Simão, Joaquim ; Pires, Vera ; Sitzia, Fabio ; Mirão, José
Date: 2024
Persistent ID: http://hdl.handle.net/10362/172392
Origin: Repositório Institucional da UNL
Project/scholarship:
info:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F149699%2F2019/PT;
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FMulti%2F04449%2F2013/PT;
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04449%2F2020/PT;
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04449%2F2020/PT;
Subject(s): building pathology; efficacy of protective coatings; European standards; mechanical resistance of limestones; salt damage; slabs for cladding; stone durability; stone protection; Computer Science (miscellaneous); Geography, Planning and Development; Renewable Energy, Sustainability and the Environment; Environmental Science (miscellaneous); Energy Engineering and Power Technology; Hardware and Architecture; Computer Networks and Communications; Management, Monitoring, Policy and Law; SDG 7 - Affordable and Clean Energy
Description
Funding Information: Carla Lisci gratefully acknowledges Roberto Madorno (PhD, Chemistry Engineer) for the support. Fabio Sitzia gratefully acknowledge FEDER (alentejo2020): Recursos Humanos Altamente Qualificados—ALT2059-2019-24. Vera Pires gratefully acknowledges the Contrato Programa entre FCT e a Universidade de Évora no âmbito do concurso estímulo ao emprego científico institucional 2018. The authors gratefully acknowledge the following funding sources and all the companies involved in INOVSTONE4.0 with reference POCI-01-0247-FEDER-024535), Portugal 2020, co-financed by Fundação para a Ciência e Tecnologia (FCT) under the project UID/Multi/04449/2013 (POCI-01-0145-FEDER-007649). The authors gratefully acknowledge the European Union: Sustainable Stone by Portugal, Call: 2021-C05i0101-02—agendas/alianças mobilizadoras para a reindustrialização—PRR (Proposal: C632482988-00467016). Publisher Copyright: © 2024 by the authors.
Stone deterioration is significantly influenced by the process of salt crystallisation. The expansion of salt crystals on a porous framework exerts pressure on the solid fraction, causing the stone to deteriorate when the internal pressure of salt surpasses the stone’s strength. Protective coatings are employed to effectively hinder or substantially reduce the penetration of water and saline solutions. This study attempts to evaluate the effectiveness and long-term durability of limestones protected with hydrophobic coatings, focusing on their resistance to salt damage. The investigation followed the specifications set by the standard EN 12370:2019 and EN 14147:2003, which assesses the resistance of natural stone to salt crystallisation. The findings of this study indicate the conservation of physical–mechanical properties after ageing tests. In parallel, measurements of the static contact angle and the measurement of quality indexes revealed that the coatings maintained a certain level of hydrophobicity even after undergoing salt weathering tests, maintaining the good quality of the stones.
