Chemical resistance in acidic environments of alkali-activated lightweight composites based on secondary raw materials
Lancellotti, Isabella; Dal Poggetto, Giovanni; Barbieri, Luisa; Nguyen, Hoang; Leonelli, Cristina (2024-09-20)
Avaa tiedosto
Sisältö avataan julkiseksi: 20.09.2025
Taylor & Francis
20.09.2024
Lancellotti, I., Dal Poggetto, G., Barbieri, L., Nguyen, H., & Leonelli, C. (2024). Chemical resistance in acidic environments of alkali-activated lightweight composites based on secondary raw materials. Journal of Sustainable Cement-Based Materials, 13(11), 1631–1640. https://doi.org/10.1080/21650373.2024.2404595
https://creativecommons.org/licenses/by-nc/4.0/
This is an Accepted Manuscript version of the following article, accepted for publication in Journal of sustainable cement-based materials. Lancellotti, I., Dal Poggetto, G., Barbieri, L., Nguyen, H., & Leonelli, C. (2024). Chemical resistance in acidic environments of alkali-activated lightweight composites based on secondary raw materials. Journal of Sustainable Cement-Based Materials, 13(11), 1631–1640. https://doi.org/10.1080/21650373.2024.2404595. It is deposited under the terms of the Creative Commons Attribution-NonCommercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
https://creativecommons.org/licenses/by-nc/4.0/
This is an Accepted Manuscript version of the following article, accepted for publication in Journal of sustainable cement-based materials. Lancellotti, I., Dal Poggetto, G., Barbieri, L., Nguyen, H., & Leonelli, C. (2024). Chemical resistance in acidic environments of alkali-activated lightweight composites based on secondary raw materials. Journal of Sustainable Cement-Based Materials, 13(11), 1631–1640. https://doi.org/10.1080/21650373.2024.2404595. It is deposited under the terms of the Creative Commons Attribution-NonCommercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
https://creativecommons.org/licenses/by-nc/4.0/
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:oulu-202409256059
https://urn.fi/URN:NBN:fi:oulu-202409256059
Tiivistelmä
Abstract
The durability problems in Portland cement are related to decalcification of C–S–H; alkali-activated composites are proposed as alternative, focusing on acid exposure and resistance. They were prepared from recycled materials, basic oxygen furnace carbonated and desulfurization slags. The standard material is 100% metakaolin geopolymer compared to slag-based alkali-activated materials (AAMs) with and without reinforcement of fibers (basalt, and cellulose), added in 4 wt%. The acidic environments are H2SO4, HCl, and HNO3 N = 2.14 (10, 7.5, and 12.5 wt%, respectively). The chemical resistance is improved by the addition of basalt fibers. The decrease in weight loss is 48% in HNO3 and 47% in HCl for AAM-Bas sample, while for AAM-Cell it is 9% in HCl and 34% in HNO3. The compressive strength of the AAM and AAM-Bas samples remains constant after HCl attack, while this acid attacks cellulose samples, which are stable in HNO3 and have a compressive strength of 10 MPa.
The durability problems in Portland cement are related to decalcification of C–S–H; alkali-activated composites are proposed as alternative, focusing on acid exposure and resistance. They were prepared from recycled materials, basic oxygen furnace carbonated and desulfurization slags. The standard material is 100% metakaolin geopolymer compared to slag-based alkali-activated materials (AAMs) with and without reinforcement of fibers (basalt, and cellulose), added in 4 wt%. The acidic environments are H2SO4, HCl, and HNO3 N = 2.14 (10, 7.5, and 12.5 wt%, respectively). The chemical resistance is improved by the addition of basalt fibers. The decrease in weight loss is 48% in HNO3 and 47% in HCl for AAM-Bas sample, while for AAM-Cell it is 9% in HCl and 34% in HNO3. The compressive strength of the AAM and AAM-Bas samples remains constant after HCl attack, while this acid attacks cellulose samples, which are stable in HNO3 and have a compressive strength of 10 MPa.
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