Details
| Original language | English |
|---|---|
| Title of host publication | Developments in Strategic Ceramic Materials II |
| Subtitle of host publication | A Collection of Papers Presented at the 40th International Conference on Advanced Ceramics and Composites, ICACC 2016 |
| Editors | Waltraud M. Kriven, Yanchun Zhou, Jingyang Wang, Dongming Zhu, Gustavo Costa |
| Publisher | American Ceramic Society |
| Pages | 145-157 |
| Number of pages | 13 |
| Edition | 7 |
| ISBN (electronic) | 9781119321811 |
| ISBN (print) | 9781119321781 |
| Publication status | Published - 30 Jan 2017 |
| Event | Developments in Strategic Ceramic Materials II - 40th International Conference on Advanced Ceramics and Composites, ICACC 2016 - Daytona Beach, United States Duration: 24 Jan 2016 → 29 Jan 2016 |
Publication series
| Name | Ceramic Engineering and Science Proceedings |
|---|---|
| Number | 7 |
| Volume | 37 |
| ISSN (Print) | 0196-6219 |
Abstract
Sodium waterglass (NWG) such as commercial NWG (S1), NWG from pure rice husk ash (S2) and NWG from raw rice husk ash (S3) were used for producing geopolymer cements from metakaolin (MK) as aluminosilicate source. Geopolymers (Geo1, Geo2, Geo3) were prepared using each NWG with the molar ratios SiO2/Na2O and H2O/Na2O kept constant at 1.5 and 12 respectively. It could be observed that the water absorption of Geo1, Geo2 and Geo3 are 7%, 9% and 13.2% and the mass loss are 15.8%, 14.7% and 12.4% respectively. The compressive strengths (43.3/40.3/33.2 MPa) decrease in the course Geo1/Geo2/Geo3. It is discussed that the presence of phosphate known as corrosion inhibitors in raw rice husk ash hinders the dissolution of SiO2. It entails the formation of NaH2PO4 in S3 which reduces the soluble Si atoms suggesting thus sodium waterglass from raw rice husk ash is a less depolymerized solution. Therefore, less amount of metakaolin could be dissolved leaving thus a higher amount of unreacted metakaolin particles in Geo3. The reacted volumes and compositions of the geopolymers are different in the three cases, too. A content of approximately 20%, 25% and 35% of unreacted metakaolin was proven for Geo1, Geo2 and Geo3 respectively.
ASJC Scopus subject areas
- Materials Science(all)
- Ceramics and Composites
- Materials Science(all)
- Materials Chemistry
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Developments in Strategic Ceramic Materials II : A Collection of Papers Presented at the 40th International Conference on Advanced Ceramics and Composites, ICACC 2016. ed. / Waltraud M. Kriven; Yanchun Zhou; Jingyang Wang; Dongming Zhu; Gustavo Costa. 7. ed. American Ceramic Society, 2017. p. 145-157 (Ceramic Engineering and Science Proceedings; Vol. 37, No. 7).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Metakaolin-based geopolymer cements from commercial sodium waterglass and sodium waterglass from rice husk ash
T2 - Developments in Strategic Ceramic Materials II - 40th International Conference on Advanced Ceramics and Composites, ICACC 2016
AU - Tchakouté, Hervé K.
AU - Rüscher, Claus H.
N1 - Funding information: ACKNOWLEDGMENTS 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. 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.
PY - 2017/1/30
Y1 - 2017/1/30
N2 - Sodium waterglass (NWG) such as commercial NWG (S1), NWG from pure rice husk ash (S2) and NWG from raw rice husk ash (S3) were used for producing geopolymer cements from metakaolin (MK) as aluminosilicate source. Geopolymers (Geo1, Geo2, Geo3) were prepared using each NWG with the molar ratios SiO2/Na2O and H2O/Na2O kept constant at 1.5 and 12 respectively. It could be observed that the water absorption of Geo1, Geo2 and Geo3 are 7%, 9% and 13.2% and the mass loss are 15.8%, 14.7% and 12.4% respectively. The compressive strengths (43.3/40.3/33.2 MPa) decrease in the course Geo1/Geo2/Geo3. It is discussed that the presence of phosphate known as corrosion inhibitors in raw rice husk ash hinders the dissolution of SiO2. It entails the formation of NaH2PO4 in S3 which reduces the soluble Si atoms suggesting thus sodium waterglass from raw rice husk ash is a less depolymerized solution. Therefore, less amount of metakaolin could be dissolved leaving thus a higher amount of unreacted metakaolin particles in Geo3. The reacted volumes and compositions of the geopolymers are different in the three cases, too. A content of approximately 20%, 25% and 35% of unreacted metakaolin was proven for Geo1, Geo2 and Geo3 respectively.
AB - Sodium waterglass (NWG) such as commercial NWG (S1), NWG from pure rice husk ash (S2) and NWG from raw rice husk ash (S3) were used for producing geopolymer cements from metakaolin (MK) as aluminosilicate source. Geopolymers (Geo1, Geo2, Geo3) were prepared using each NWG with the molar ratios SiO2/Na2O and H2O/Na2O kept constant at 1.5 and 12 respectively. It could be observed that the water absorption of Geo1, Geo2 and Geo3 are 7%, 9% and 13.2% and the mass loss are 15.8%, 14.7% and 12.4% respectively. The compressive strengths (43.3/40.3/33.2 MPa) decrease in the course Geo1/Geo2/Geo3. It is discussed that the presence of phosphate known as corrosion inhibitors in raw rice husk ash hinders the dissolution of SiO2. It entails the formation of NaH2PO4 in S3 which reduces the soluble Si atoms suggesting thus sodium waterglass from raw rice husk ash is a less depolymerized solution. Therefore, less amount of metakaolin could be dissolved leaving thus a higher amount of unreacted metakaolin particles in Geo3. The reacted volumes and compositions of the geopolymers are different in the three cases, too. A content of approximately 20%, 25% and 35% of unreacted metakaolin was proven for Geo1, Geo2 and Geo3 respectively.
UR - http://www.scopus.com/inward/record.url?scp=85044324627&partnerID=8YFLogxK
U2 - 10.1002/9781119321811.ch14
DO - 10.1002/9781119321811.ch14
M3 - Conference contribution
AN - SCOPUS:85044324627
SN - 9781119321781
T3 - Ceramic Engineering and Science Proceedings
SP - 145
EP - 157
BT - Developments in Strategic Ceramic Materials II
A2 - Kriven, Waltraud M.
A2 - Zhou, Yanchun
A2 - Wang, Jingyang
A2 - Zhu, Dongming
A2 - Costa, Gustavo
PB - American Ceramic Society
Y2 - 24 January 2016 through 29 January 2016
ER -