Behavior of calcined clay based geopolymers under sulfuric acid attack: Meta-illite and metakaolin

Autor: Laura Diaz Caselles, Bastien Balsamo, Virginie Benavent, Vincent Trincal, Hugo Lahalle, Cédric Patapy, Valérie Montouillout, Martin Cyr
Přispěvatelé: Laboratoire Matériaux et Durabilité des constructions (LMDC), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT), Conditions Extrêmes et Matériaux : Haute Température et Irradiation (CEMHTI), Université d'Orléans (UO)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Construction and Building Materials
Construction and Building Materials, 2023, 363, pp.129889. ⟨10.1016/j.conbuildmat.2022.129889⟩
ISSN: 0950-0618
DOI: 10.1016/j.conbuildmat.2022.129889⟩
Popis: International audience; This paper studies the behavior of four different calcined clay-based geopolymers under sulfuric acid attack and gives insights into their degradation mechanisms. Pastes were cast using metakaolin and meta-illite and were activated by two different alkaline solutions. Mineralogical and microscopic characterizations were performed on pastes before and after attack. Results indicated that all pastes were affected by low leaching of alkali cations, and thus by a linkage disequilibrium of the geopolymer network. Meta-illite based geopolymers, which had not been addressed in the literature until now, hold promise for improving the durability of materials in aggressive environments.
Databáze: OpenAIRE
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