Improving thermal insulation and thermal resistance properties of laterite-based geopolymer foams by direct foaming
Tchio, Julson Aymard; Fekoua, Joelle Nadia Nouping; Kaze, Cyriaque Rodrigue; Nemaleu, Juvenal Giogetti Deuton; Yliniemi, Juho; Kamseu, Elie; Chinje, Florence Uphie; Leonelli, Cristina (2024-10-22)
Tchio, Julson Aymard
Fekoua, Joelle Nadia Nouping
Kaze, Cyriaque Rodrigue
Nemaleu, Juvenal Giogetti Deuton
Yliniemi, Juho
Kamseu, Elie
Chinje, Florence Uphie
Leonelli, Cristina
John Wiley & Sons
22.10.2024
Tchio JA, Fekoua JNN, Kaze CR, Nemaleu JGD, Yliniemi J, Kamseu E, et al. Improving thermal insulation and thermal resistance properties of laterite-based geopolymer foams by direct foaming. Int J Appl Ceram Technol. 2025; 22:e14959. https://doi.org/10.1111/ijac.14959
https://creativecommons.org/licenses/by-nc/4.0/
© 2024 The Author(s). International Journal of Applied Ceramic Technology published by Wiley Periodicals LLC on behalf of American Ceramics Society. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
https://creativecommons.org/licenses/by-nc/4.0/
© 2024 The Author(s). International Journal of Applied Ceramic Technology published by Wiley Periodicals LLC on behalf of American Ceramics Society. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
https://creativecommons.org/licenses/by-nc/4.0/
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:oulu-202410286485
https://urn.fi/URN:NBN:fi:oulu-202410286485
Tiivistelmä
Abstract
This work aims to synthesize new foaming laterite geopolymer foam using laterite, sodium silicate solution, sand, and aluminium powder. The porosity rapidly increased with the addition of the foaming agent. The foam matrix had thermal conductivity values of 0.10 W/m K with 0.7% of Al powder and 0.64 W/m K with 0% of Al powder. For fire resistance, samples exposed to high temperatures (200°C and 500°C) showed increased flexural strength, linear shrinkage at 500°C, and a decrease at 900°C due to structural weakening under high thermal pressure and the appearance of new phases such as nepheline and akermanite in X-ray diffraction analysis. The results also showed that a 30% increase in fine aggregate content increased the strength of the foam matrix, with flexural strength ranging from 5 to 9.1 MPa after 28 days of ambient curing. These laterite geopolymer foams have shown promising thermal insulation and mechanical qualities that are appropriate for building applications.
This work aims to synthesize new foaming laterite geopolymer foam using laterite, sodium silicate solution, sand, and aluminium powder. The porosity rapidly increased with the addition of the foaming agent. The foam matrix had thermal conductivity values of 0.10 W/m K with 0.7% of Al powder and 0.64 W/m K with 0% of Al powder. For fire resistance, samples exposed to high temperatures (200°C and 500°C) showed increased flexural strength, linear shrinkage at 500°C, and a decrease at 900°C due to structural weakening under high thermal pressure and the appearance of new phases such as nepheline and akermanite in X-ray diffraction analysis. The results also showed that a 30% increase in fine aggregate content increased the strength of the foam matrix, with flexural strength ranging from 5 to 9.1 MPa after 28 days of ambient curing. These laterite geopolymer foams have shown promising thermal insulation and mechanical qualities that are appropriate for building applications.
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