Water resistance and thermal behavior of metakaolin-phosphate-based geopolymer cements

Research output: Contribution to journalArticleResearchpeer review

Authors

  • Hervé K. Tchakouté
  • Daniel Fotio
  • Claus H. Rüscher
  • Elie Authority
  • Cristina Leonelli
  • Christelle N. Bewa

Research Organisations

External Research Organisations

  • University of Yaounde I
  • University of Modena and Reggio Emilia
  • University of Maroua
  • Local Material Promotion Authority (MIPROMALO)
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Details

Original languageEnglish
Pages (from-to)271-283
Number of pages13
JournalJournal of Asian Ceramic Societies
Volume6
Issue number3
Publication statusPublished - 30 Aug 2018

Abstract

The main target of this work was to investigate the thermal behavior and water resistance of geopolymer cement made from metakaolin as an aluminosilicate source using phosphoric acid solution (10 M) as a hardener. The obtained geopolymer cements were cured at room temperature for 28 days, the one part was treated at 200°C, 400°C, 600°C, 800°C and 1000°C, and the others were soaked in water for 28 days. The geopolymer cements were characterized by microstructural properties using X-ray diffractometry, infrared spectroscopy, microstructure, physical property based on water resistance and thermo-mechanical properties (thermal analysis, compressive strength). The results show that the compressive strength of the unheated geopolymer cement was 87.96 MPa. The ones soaked in water revealed a strength of 40.71 MPa. This indicates that the specimens soaked in water lose about 54% of their strengths. The X-ray patterns of heated geopolymer cements showed the formation of crystalline phases even at relatively low temperatures. It was typically found that the compressive strength of metakaolin-phosphate-based geopolymer cements decreases due to the hydrolysis of Si-O-P bonds in the presence of water.

Keywords

    geopolymer cements, Metakaolin, phosphoric acid solution, water resistant

ASJC Scopus subject areas

Cite this

Water resistance and thermal behavior of metakaolin-phosphate-based geopolymer cements. / Tchakouté, Hervé K.; Fotio, Daniel; Rüscher, Claus H. et al.
In: Journal of Asian Ceramic Societies, Vol. 6, No. 3, 30.08.2018, p. 271-283.

Research output: Contribution to journalArticleResearchpeer review

Tchakouté, HK, Fotio, D, Rüscher, CH, Authority, E, Leonelli, C & Bewa, CN 2018, 'Water resistance and thermal behavior of metakaolin-phosphate-based geopolymer cements', Journal of Asian Ceramic Societies, vol. 6, no. 3, pp. 271-283. https://doi.org/10.1080/21870764.2018.1507660, https://doi.org/10.15488/4251
Tchakouté, H. K., Fotio, D., Rüscher, C. H., Authority, E., Leonelli, C., & Bewa, C. N. (2018). Water resistance and thermal behavior of metakaolin-phosphate-based geopolymer cements. Journal of Asian Ceramic Societies, 6(3), 271-283. https://doi.org/10.1080/21870764.2018.1507660, https://doi.org/10.15488/4251
Tchakouté HK, Fotio D, Rüscher CH, Authority E, Leonelli C, Bewa CN. Water resistance and thermal behavior of metakaolin-phosphate-based geopolymer cements. Journal of Asian Ceramic Societies. 2018 Aug 30;6(3):271-283. doi: 10.1080/21870764.2018.1507660, 10.15488/4251
Tchakouté, Hervé K. ; Fotio, Daniel ; Rüscher, Claus H. et al. / Water resistance and thermal behavior of metakaolin-phosphate-based geopolymer cements. In: Journal of Asian Ceramic Societies. 2018 ; Vol. 6, No. 3. pp. 271-283.
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abstract = "The main target of this work was to investigate the thermal behavior and water resistance of geopolymer cement made from metakaolin as an aluminosilicate source using phosphoric acid solution (10 M) as a hardener. The obtained geopolymer cements were cured at room temperature for 28 days, the one part was treated at 200°C, 400°C, 600°C, 800°C and 1000°C, and the others were soaked in water for 28 days. The geopolymer cements were characterized by microstructural properties using X-ray diffractometry, infrared spectroscopy, microstructure, physical property based on water resistance and thermo-mechanical properties (thermal analysis, compressive strength). The results show that the compressive strength of the unheated geopolymer cement was 87.96 MPa. The ones soaked in water revealed a strength of 40.71 MPa. This indicates that the specimens soaked in water lose about 54% of their strengths. The X-ray patterns of heated geopolymer cements showed the formation of crystalline phases even at relatively low temperatures. It was typically found that the compressive strength of metakaolin-phosphate-based geopolymer cements decreases due to the hydrolysis of Si-O-P bonds in the presence of water.",
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AU - Rüscher, Claus H.

AU - Authority, Elie

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N1 - Funding information: This work was supported by the Alexander von Humboldt-Stiftung [KAM/1155741 STP]. Hervé Tchakouté Kouamo gratefully acknowledges the Alexander von Humboldt Foundation for the purchase of some equipment in the laboratory under the grant No. KAM/1155741 STP. The authors thank Dr Mark Bediako for proofreading the manuscript and Mr Valerie Petrov for SEM observations.

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