PSI - Issue 64

ScienceDirect Structural Integrity Procedia 00 (2023) 000 – 000 Structural Integrity Procedia 00 (2023) 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

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Procedia Structural Integrity 64 (2024) 1935–1942

SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Masonry structures retrofitting by geopolymer plaster reinforced with natural fibers Salvatore Benfratello*, Luigi Palizzolo, Carmelo Sanfilippo, Antonino Valenza Department of Engineering, University of Palermo, I-90128, Palermo, Italy Abstract Geopolymers describe a class of aluminosilicate materials obtained by alkaline activation of an aluminosilicate precursor at low temperatures and, nowadays, represents a very strong competitor to Portland cement-based materials in the field of constructions. To improve the mechanical characteristics of geopolymers, the adoption of fibers (natural or not) has been proposed and this is the topic of a very large literature. From the other hand, nowadays the problem of environmental sustainability is very important and the geopolymers possess many features making them as the cutting-edge material of the future. Further, the adoption of natural fibers makes geopolymers even more interesting from the environmental sustainability point of view. In many cases of practical application strengthening of existing masonry structures represents a very important topic involving the field of structural engineering as well as that of restoration. In both fields it is important to adopt sustainable materials showing the required mechanical characteristics. Aim of the paper is to verify the use of geopolymer plaster reinforced by natural fibers as strengthening tool for masonry structures. The aim will be firstly reached by suitably modelling the mechanical behaviour of samples of geopolymer plaster realized in laboratory starting from experimental results and secondly modelling the behaviour of a masonry panel reinforced with such plaster by means of a suitable FEM model in Abaqus. © 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: Reinforced plaster, Geopolymers, Masonry structures, Retrofitting, Natural fibers SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Masonry structures retrofitting by geopolymer plaster reinforced with natural fibers Salvatore Benfratello*, Luigi Palizzolo, Carmelo Sanfilippo, Antonino Valenza Department of Engineering, University of Palermo, I-90128, Palermo, Italy Abstract Geopolymers describe a class of aluminosilicate materials obtained by alkaline activation of an aluminosilicate precursor at low temperatures and, nowadays, represents a very strong competitor to Portland cement-based materials in the field of constructions. To improve the mechanical characteristics of geopolymers, the adoption of fibers (natural or not) has been proposed and this is the topic of a very large literature. From the other hand, nowadays the problem of environmental sustainability is very important and the geopolymers possess many features making them as the cutting-edge material of the future. Further, the adoption of natural fibers makes geopolymers even more interesting from the environmental sustainability point of view. In many cases of practical application strengthening of existing masonry structures represents a very important topic involving the field of structural engineering as well as that of restoration. In both fields it is important to adopt sustainable materials showing the required mechanical characteristics. Aim of the paper is to verify the use of geopolymer plaster reinforced by natural fibers as strengthening tool for masonry structures. The aim will be firstly reached by suitably modelling the mechanical behaviour of samples of geopolymer plaster realized in laboratory starting from experimental results and secondly modelling the behaviour of a masonry panel reinforced with such plaster by means of a suitable FEM model in Abaqus. © 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: Reinforced plaster, Geopolymers, Masonry structures, Retrofitting, Natural fibers 1. Introduction Masonry structures represent a very important part of the global building heritage, especially of the historical one. © 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 1. Introduction Masonry structures represent a very important part of the global building heritage, especially of the historical one.

* Corresponding author. Tel.: +39+09123896729. E-mail address: salvatore.benfratello@unipa.it * Corresponding author. Tel.: +39+09123896729. E-mail address: salvatore.benfratello@unipa.it

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.2024.09.263 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