Articles | Volume 58
27 Jan 2023
 | 27 Jan 2023

Metakaolin-based geopolymers for stone conservation: preliminary results on alkaline activation

Sophie van Roosmale, Tim De Kock, and Johan Blom

Cited articles

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Alventosa, K. M. L. and White, C. E.: The effects of calcium hydroxide and activator chemistry on alkali-activated metakaolin pastes, Cement Concrete Res., 145, 106453,, 2021. 
Clausi, M., Magnani, L., Occhipinti, R., Riccardi, M., Zema, M., and Tarantino, S.: Interaction of Metakaolin-based geopolymers with natural and artificial stones and implications on their use in cultural heritage, Int. J. Conserv. Sci., 7, 871–884, 2016a. 
Clausi, M., Tarantino, S., Magnani, L., Riccardi, M., Tedeschi, C., and Zema, M.: Metakaolin as a precursor of materials for applications in Cultural Heritage: Geopolymer-based mortars with ornamental stone aggregates, J. Appl. Clay Sci., 132/133, 598–599,, 2016b. 
Short summary
Metakaolin-based geopolymers with a Ca(OH)2 activator are investigated in the context of stone-built heritage conservation. The results of the reactivity tests are compared to the results of geopolymers with more well-known activators like NaOH and KOH. Subsequently, the physico-mechemical properties of the geopolymer with Ca(OH)2 is also investigated, in combination with standardized aggregates of marl powder, limestone powder and quartz sand.