Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 252-261 |
| Seitenumfang | 10 |
| Fachzeitschrift | Journal of Building Engineering |
| Jahrgang | 6 |
| Frühes Online-Datum | 25 Apr. 2016 |
| Publikationsstatus | Veröffentlicht - 1 Juni 2016 |
Abstract
Rice husk from source in Cameroon was leached in HCl (5 M) to remove the most of metallic ingredients and then calcined at 600 °C in order to produce white rice husk ash. This white ash were applied for producing sodium waterglass with different molar ratios SiO2/Na2O (0.31; 0.47; 0.62; 0.78; 0.93; 1.09 and 1.25) and then used to synthesize metakaolin-based geopolymer cements. The obtained white rice husk ash shows the loss of crystalline mineral and reveals high amorphous silica with quartz as impurity. Geopolymers GPi (i varying from 1 to 7) were obtained using different synthesis sodium waterglass (NWG) with a mass ratio NWG/MK=0.87. It could be observed that the 28 days compressive strength (4/5/7/9/32/34/36 MPa) increase with increasing the molar ratios SiO2/Na2O defined in this work in the course GP1/GP2/GP3/GP4/GP5/GP6/GP7. The micrographs show the formation of more geopolymer gels when the molar ratios SiO2/Na2O in alkaline activators are between 0.93 and 1.25. Sodium waterglass from white rice husk ash proved to be an effective alkaline activator in geopolymers preparation. It can be concluded that it is possible to replace quartz sand and sodium carbonate which is responsible to greenhouse gas emitted during the production of commercial sodium silicate solution by using rice husk as silica sources.
ASJC Scopus Sachgebiete
- Ingenieurwesen (insg.)
- Tief- und Ingenieurbau
- Ingenieurwesen (insg.)
- Architektur
- Ingenieurwesen (insg.)
- Bauwesen
- Ingenieurwesen (insg.)
- Sicherheit, Risiko, Zuverlässigkeit und Qualität
- Ingenieurwesen (insg.)
- Werkstoffmechanik
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in: Journal of Building Engineering, Jahrgang 6, 01.06.2016, S. 252-261.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Synthesis of sodium waterglass from white rice husk ash as an activator to produce metakaolin-based geopolymer cements
AU - Tchakouté, Hervé Kouamo
AU - Rüscher, Claus Henning
AU - Kong, Sakeo
AU - Ranjbar, Navid
N1 - Funding Information: Hervé Tchakouté Kouamo gratefully acknowledges the Alexander von Humboldt Foundation for financially support his Postdoctoral research (No. KAM/1155741 STP ) in Institut für Mineralogie, Leibniz Universität Hannover, Germany.
PY - 2016/6/1
Y1 - 2016/6/1
N2 - Rice husk from source in Cameroon was leached in HCl (5 M) to remove the most of metallic ingredients and then calcined at 600 °C in order to produce white rice husk ash. This white ash were applied for producing sodium waterglass with different molar ratios SiO2/Na2O (0.31; 0.47; 0.62; 0.78; 0.93; 1.09 and 1.25) and then used to synthesize metakaolin-based geopolymer cements. The obtained white rice husk ash shows the loss of crystalline mineral and reveals high amorphous silica with quartz as impurity. Geopolymers GPi (i varying from 1 to 7) were obtained using different synthesis sodium waterglass (NWG) with a mass ratio NWG/MK=0.87. It could be observed that the 28 days compressive strength (4/5/7/9/32/34/36 MPa) increase with increasing the molar ratios SiO2/Na2O defined in this work in the course GP1/GP2/GP3/GP4/GP5/GP6/GP7. The micrographs show the formation of more geopolymer gels when the molar ratios SiO2/Na2O in alkaline activators are between 0.93 and 1.25. Sodium waterglass from white rice husk ash proved to be an effective alkaline activator in geopolymers preparation. It can be concluded that it is possible to replace quartz sand and sodium carbonate which is responsible to greenhouse gas emitted during the production of commercial sodium silicate solution by using rice husk as silica sources.
AB - Rice husk from source in Cameroon was leached in HCl (5 M) to remove the most of metallic ingredients and then calcined at 600 °C in order to produce white rice husk ash. This white ash were applied for producing sodium waterglass with different molar ratios SiO2/Na2O (0.31; 0.47; 0.62; 0.78; 0.93; 1.09 and 1.25) and then used to synthesize metakaolin-based geopolymer cements. The obtained white rice husk ash shows the loss of crystalline mineral and reveals high amorphous silica with quartz as impurity. Geopolymers GPi (i varying from 1 to 7) were obtained using different synthesis sodium waterglass (NWG) with a mass ratio NWG/MK=0.87. It could be observed that the 28 days compressive strength (4/5/7/9/32/34/36 MPa) increase with increasing the molar ratios SiO2/Na2O defined in this work in the course GP1/GP2/GP3/GP4/GP5/GP6/GP7. The micrographs show the formation of more geopolymer gels when the molar ratios SiO2/Na2O in alkaline activators are between 0.93 and 1.25. Sodium waterglass from white rice husk ash proved to be an effective alkaline activator in geopolymers preparation. It can be concluded that it is possible to replace quartz sand and sodium carbonate which is responsible to greenhouse gas emitted during the production of commercial sodium silicate solution by using rice husk as silica sources.
KW - Compressive strength
KW - Geopolymers
KW - Metakaolin
KW - Rice husk
KW - Sodium hydroxide
KW - Sodium waterglass
UR - http://www.scopus.com/inward/record.url?scp=84967154755&partnerID=8YFLogxK
U2 - 10.1016/j.jobe.2016.04.007
DO - 10.1016/j.jobe.2016.04.007
M3 - Article
AN - SCOPUS:84967154755
VL - 6
SP - 252
EP - 261
JO - Journal of Building Engineering
JF - Journal of Building Engineering
ER -