Acid-based geopolymers using waste fired brick and different metakaolins as raw materials

Research output: Contribution to journal › Article › Research › peer review

Authors

  • Christelle N. Bewa
  • Hervé K. Tchakouté
  • Charles Banenzoué
  • Lorette Cakanou
  • Theophile T. Mbakop
  • Elie Kamseu
  • Claus H. Rüscher

Research Organisations

External Research Organisations

  • University of Yaounde I
  • University of Douala
  • Local Material Promotion Authority (MIPROMALO)
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Details

Original languageEnglish
Article number105813
JournalApplied clay science
Volume198
Early online date21 Aug 2020
Publication statusPublished - 15 Nov 2020

Abstract

Three metakaolins and waste fired brick were used to explore the effects of iron oxide, amorphous silica and quartz in the raw materials on the compressive strength and the microstructural properties of acid-based geopolymers cured at room temperature and 60 °C. Quartz content in the metakaolin from Dibamba is about 22.0 wt% and each other samples contain around 8.0 wt%. Waste fired brick and metakaolin from Bangoua contain nanocrystalline hematite and have higher amorphous silica content. The higher quartz content in the metakaolin from Dibamba could prevent the incorporation of PO4 units in the networks. The compressive strengths of the acid-based geopolymers cured at room temperature are higher (35.3–56.4 MPa) compared to those cured at 60 °C (17.8–32.9 MPa). The higher amorphous silica and nanocrystalline hematite content in the starting materials could accelerate the hardening process. It can be concluded that iron oxide, amorphous silica and quartz in the starting material could affect the compressive strengths of acid-based geopolymers.

Keywords

    Acid-based geopolymers, Amorphous silica, Iron oxide, Metakaolins, Quartz, Waste fired brick

ASJC Scopus subject areas

Cite this

Acid-based geopolymers using waste fired brick and different metakaolins as raw materials. / Bewa, Christelle N.; Tchakouté, Hervé K.; Banenzoué, Charles et al.
In: Applied clay science, Vol. 198, 105813, 15.11.2020.

Research output: Contribution to journal › Article › Research › peer review

Bewa, CN, Tchakouté, HK, Banenzoué, C, Cakanou, L, Mbakop, TT, Kamseu, E & Rüscher, CH 2020, 'Acid-based geopolymers using waste fired brick and different metakaolins as raw materials', Applied clay science, vol. 198, 105813. https://doi.org/10.1016/j.clay.2020.105813
Bewa, C. N., Tchakouté, H. K., Banenzoué, C., Cakanou, L., Mbakop, T. T., Kamseu, E., & Rüscher, C. H. (2020). Acid-based geopolymers using waste fired brick and different metakaolins as raw materials. Applied clay science, 198, Article 105813. https://doi.org/10.1016/j.clay.2020.105813
Bewa CN, Tchakouté HK, Banenzoué C, Cakanou L, Mbakop TT, Kamseu E et al. Acid-based geopolymers using waste fired brick and different metakaolins as raw materials. Applied clay science. 2020 Nov 15;198:105813. Epub 2020 Aug 21. doi: 10.1016/j.clay.2020.105813
Bewa, Christelle N. ; Tchakouté, Hervé K. ; Banenzoué, Charles et al. / Acid-based geopolymers using waste fired brick and different metakaolins as raw materials. In: Applied clay science. 2020 ; Vol. 198.
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abstract = "Three metakaolins and waste fired brick were used to explore the effects of iron oxide, amorphous silica and quartz in the raw materials on the compressive strength and the microstructural properties of acid-based geopolymers cured at room temperature and 60 °C. Quartz content in the metakaolin from Dibamba is about 22.0 wt% and each other samples contain around 8.0 wt%. Waste fired brick and metakaolin from Bangoua contain nanocrystalline hematite and have higher amorphous silica content. The higher quartz content in the metakaolin from Dibamba could prevent the incorporation of PO4 units in the networks. The compressive strengths of the acid-based geopolymers cured at room temperature are higher (35.3–56.4 MPa) compared to those cured at 60 °C (17.8–32.9 MPa). The higher amorphous silica and nanocrystalline hematite content in the starting materials could accelerate the hardening process. It can be concluded that iron oxide, amorphous silica and quartz in the starting material could affect the compressive strengths of acid-based geopolymers.",
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AU - Bewa, Christelle N.

AU - Tchakouté, Hervé K.

AU - Banenzoué, Charles

AU - Cakanou, Lorette

AU - Mbakop, Theophile T.

AU - Kamseu, Elie

AU - Rüscher, Claus H.

N1 - Funding information: Dr. Tchakouté Kouamo Hervé gratefully acknowledges the Alexander von Humboldt-Stiftung for its financial support this work under grant N ° KAM/1155741 GFHERMES-P . The authors would like to thank Dr. Valerie Petrov for SEM observations and Dr. Ricarda Behrens for XRF analysis performed.

PY - 2020/11/15

Y1 - 2020/11/15

N2 - Three metakaolins and waste fired brick were used to explore the effects of iron oxide, amorphous silica and quartz in the raw materials on the compressive strength and the microstructural properties of acid-based geopolymers cured at room temperature and 60 °C. Quartz content in the metakaolin from Dibamba is about 22.0 wt% and each other samples contain around 8.0 wt%. Waste fired brick and metakaolin from Bangoua contain nanocrystalline hematite and have higher amorphous silica content. The higher quartz content in the metakaolin from Dibamba could prevent the incorporation of PO4 units in the networks. The compressive strengths of the acid-based geopolymers cured at room temperature are higher (35.3–56.4 MPa) compared to those cured at 60 °C (17.8–32.9 MPa). The higher amorphous silica and nanocrystalline hematite content in the starting materials could accelerate the hardening process. It can be concluded that iron oxide, amorphous silica and quartz in the starting material could affect the compressive strengths of acid-based geopolymers.

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