Details
| Original language | English |
|---|---|
| Pages (from-to) | 257-266 |
| Number of pages | 10 |
| Journal | Chemie der Erde |
| Volume | 77 |
| Issue number | 2 |
| Publication status | Published - 24 Apr 2017 |
Abstract
Sugar cane bagasse ash from SOSUCAM company in Cameroon was used to synthesize sodium waterglass as a new alternative hardener. The new hardener was used to prepare metakaolin-based geopolymer cements. The compressive strength of the resulting geopolymer cement cured at room temperature for 28 days was 32.9 MPa. Samples soaked for 28 days in water in parallel experiments revealed a strength of 31.4 MPa. This shows that exposure of water does not lead to any weakening. The value of water absorption was 7.1% in the water-soaked cements, indicating the presence of fewer pores and voids than in the dry cements. However, in SEM micrographs, the microstructure of geopolymer cement appears rather homogeneous and compact without any change by water soaking. It can thus be concluded that sodium waterglass from sugar cane bagasse ash can be used as an alternative hardener or reactive ingredient for producing geopolymer cement with a high degree of cross-linking geopolymer framework. The use of this low-value silica-rich waste for producing sodium waterglass results in environmental benefits including a significant reduction of CO2 emission and energy consumption compared to the production of commercial sodium waterglass.
Keywords
- Geopolymer cements, Sodium hydroxide, Sodium waterglass, Sugar cane bagasse ash, Water resistance
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Geophysics
- Earth and Planetary Sciences(all)
- Geochemistry and Petrology
Sustainable Development Goals
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In: Chemie der Erde, Vol. 77, No. 2, 24.04.2017, p. 257-266.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Utilization of sodium waterglass from sugar cane bagasse ash as a new alternative hardener for producing metakaolin-based geopolymer cement
AU - Tchakouté, Hervé Kouamo
AU - Rüscher, Claus Henning
AU - Hinsch, Malte
AU - Authority, Local Materials
AU - Authority, Local Materials
AU - Leonelli, Cristina
N1 - Funding information: Hervé Tchakouté Kouamo gratefully acknowledges the Alexander von Humboldt Foundation for financially support his Postdoctoral research (N° KAM/1155741 STP) in Institut für Mineralogie, Leibniz Universität Hannover, Germany and also thank the SOSUCAM Company for providing the sugar cane bagasse used in this investigation. The authors wish to express special thanks to the editor in charge, Prof. J. Majzlan and to Dr. D. Neave for the proofreading of the manuscript.
PY - 2017/4/24
Y1 - 2017/4/24
N2 - Sugar cane bagasse ash from SOSUCAM company in Cameroon was used to synthesize sodium waterglass as a new alternative hardener. The new hardener was used to prepare metakaolin-based geopolymer cements. The compressive strength of the resulting geopolymer cement cured at room temperature for 28 days was 32.9 MPa. Samples soaked for 28 days in water in parallel experiments revealed a strength of 31.4 MPa. This shows that exposure of water does not lead to any weakening. The value of water absorption was 7.1% in the water-soaked cements, indicating the presence of fewer pores and voids than in the dry cements. However, in SEM micrographs, the microstructure of geopolymer cement appears rather homogeneous and compact without any change by water soaking. It can thus be concluded that sodium waterglass from sugar cane bagasse ash can be used as an alternative hardener or reactive ingredient for producing geopolymer cement with a high degree of cross-linking geopolymer framework. The use of this low-value silica-rich waste for producing sodium waterglass results in environmental benefits including a significant reduction of CO2 emission and energy consumption compared to the production of commercial sodium waterglass.
AB - Sugar cane bagasse ash from SOSUCAM company in Cameroon was used to synthesize sodium waterglass as a new alternative hardener. The new hardener was used to prepare metakaolin-based geopolymer cements. The compressive strength of the resulting geopolymer cement cured at room temperature for 28 days was 32.9 MPa. Samples soaked for 28 days in water in parallel experiments revealed a strength of 31.4 MPa. This shows that exposure of water does not lead to any weakening. The value of water absorption was 7.1% in the water-soaked cements, indicating the presence of fewer pores and voids than in the dry cements. However, in SEM micrographs, the microstructure of geopolymer cement appears rather homogeneous and compact without any change by water soaking. It can thus be concluded that sodium waterglass from sugar cane bagasse ash can be used as an alternative hardener or reactive ingredient for producing geopolymer cement with a high degree of cross-linking geopolymer framework. The use of this low-value silica-rich waste for producing sodium waterglass results in environmental benefits including a significant reduction of CO2 emission and energy consumption compared to the production of commercial sodium waterglass.
KW - Geopolymer cements
KW - Sodium hydroxide
KW - Sodium waterglass
KW - Sugar cane bagasse ash
KW - Water resistance
UR - http://www.scopus.com/inward/record.url?scp=85018853140&partnerID=8YFLogxK
U2 - 10.1016/j.chemer.2017.04.003
DO - 10.1016/j.chemer.2017.04.003
M3 - Article
AN - SCOPUS:85018853140
VL - 77
SP - 257
EP - 266
JO - Chemie der Erde
JF - Chemie der Erde
SN - 0009-2819
IS - 2
ER -