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2023
ACL
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Laura Diaz Caselles, Bastien Balsamo, Virginie Benavent, Vincent Trincal, Hugo LaHalle, Cédric Patapy, Valérie Montouillout, Martin Cyr, 'Behavior of calcined clay based geopolymers under sulfuric acid attack: meta-illite and metakaolin', Constr. Build. Mater. 363 129889 (2023) doi:10.1016/j.conbuildmat.2022.129889
This paper compares 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 pastes were affected by low leaching of alkali cations, and thus by a linkage disequilibrium of the geopolymer network. Meta-illite based geopolymer activated by sodium silicate presented the least damage and hold promise for
improving the durability of materials in aggressive environments.
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