PSI - Issue 62

Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com ^ĐŝĞŶĐĞ ŝƌĞĐƚ

www.elsevier.com/locate/procedia

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Procedia Structural Integrity 62 (2024) 983–989

II Fabre Conference – Existing bridges, viaducts and tunnels: research, innovation and applications (FABRE24) Infrastructure, durability and sustainability in one concept Federico Laino a , Simone Barile b , Erica Muzzupappa c

a Building LineMapei Spa, via Cafiero 22, 20158 Milano, Italy b Building LineMapei Spa, via Cafiero 22, 20158 Milano, Italy c Building LineMapei Spa, via Cafiero 22, 20158 Milano, Italy

Abstract In this paper, the increase of the concrete structure durability is investigated through the implementation of restoration techniques aimed at achieving this goal through the use of specific advanced systems. Over time, concrete infrastructures are often subjected to the action of dynamic loads of variable amplitude that can establish different stress configurations. To this scope, a special fibre-reinforced cementitious mortar has been developed. This product has been subjected to small and large-scale dynamic bending tests and it has shown high fatigue properties. Concrete infrastructures can also be affected by different degradation phenomena that can occur depending on environmental exposure conditions. The most frequent phenomena certainly include carbonation and chloride attack. In this regard, this article shares Mapei's experience with the use of elastic cementitious mortar, emphasising the high level of protection offered both in terms of protection against carbonation and against the ingress of chlorides. To this scope, numerous laboratory tests performed on these types of membranes are shared, as well as the tests performed on samples taken from existing structures, 18 years after application, for an in-depth evaluation of the durability increase over time. Finally, a small focus on a new range of Mapei products is carried out. The Mapei Zero product range has been the object of an important research and development work to reduce the carbon footprint of these materials underlining an increasing attention to environmental sustainability. © 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 Scientific Board Members Keywords: concrete; durability, restoration, infrastructures; dynamic tests; zero. © 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 Scientific Board Members

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 Scientific Board Member s

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 Scientific Board Members 10.1016/j.prostr.2024.09.131