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Self-healing on natural hydraulic lime mortars

Description du projet

Améliorer la capacité d’autocicatrisation des mortiers hydrauliques naturels à la chaux

Les interventions de conservation des sites du patrimoine civil et architectural nécessitent l’utilisation des matériaux compatibles avec ceux d’origine, comme les mortiers à la chaux hydraulique naturelle (NHL). Puisque ces interventions doivent être durables, solides et résistantes, la capacité d’auto-guérison des mortiers de la NHL est essentielle. Le projet HeaLime, financé par l’UE, propose une nouvelle méthode de mesure pour les matériaux cimentaires et qualifiera systématiquement une combinaison de plusieurs variables dans le schéma de performance de la capacité de cicatrisation. La nouvelle méthode consiste en une adaptation de la technique EMM-ARM qui caractérise l’évolution de la rigidité des matériaux cimentaires, pour la mesure de l’autocicatrisation des mortiers NHL en service. Simultanément, différents matériaux seront combinés pour développer des mortiers NHL améliorés pour l’autocicatrisation.

Objectif

Most of the civil and architectural heritage is built with masonry structures. The interventions on such structures require the usage of compatible materials such as natural hydraulic lime (NHL) mortars that offer a promising solution due to their large compatibility with original materials in terms of chemical, physical and mechanical performance. Furthermore, these interventions demand to be as durable as possible and in this sense, the self-healing capacity of NHL mortars seems to be of potential value. HeaLime will create a new testing method to measure self-healing in cementitious materials. It will also characterize systematically a combination of several variables in the context of the performance of the healing capacity. The project will be performed mainly at University of Minho, Portugal, under the supervision of Prof. Lourenço, one of the most prestigious researcher in masonry components and Dr. Azenha, whose proposed methodology of EMM-ARM has involved a revolutionary step in the characterization of the stiffness evolution of cementitious materials. For the purpose, a new testing method will be developed by adapting the technique of EMM-ARM to the measurement of self-healing of NHL mortars in service. At the same time, different materials (such as micro-fibres, crystalline admixtures and superabsorbent polymers) will be combined to create improved NHL mortars for self-healing. Moreover, two secondments will be performed. The first one at University of Ghent, with Prof. De Belie, a leading specialist on self-healing materials, and at Kerakoll, a non-academic institution devoted to the commercialization of sustainable building materials. Finally, a series of pilot demonstration tests will be approached to study the applicability of such improved NHL mortars to building sites. HeaLime will redound in more sustainable and durable repairing operations when approaching the different interventions of the civil and architectural heritage.

Appel à propositions

H2020-WF-2018-2020

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Sous appel

H2020-WF-02-2019

Coordinateur

UNIVERSIDADE DO MINHO
Contribution nette de l'UE
€ 147 815,04
Adresse
LARGO DO PACO
4704 553 Braga
Portugal

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Région
Continente Norte Cávado
Type d’activité
Higher or Secondary Education Establishments
Liens
Coût total
€ 147 815,04