Details
| Original language | English |
|---|---|
| Pages (from-to) | 149-161 |
| Number of pages | 13 |
| Journal | Journal of Asian Ceramic Societies |
| Volume | 8 |
| Issue number | 1 |
| Publication status | Published - 28 Jan 2020 |
Abstract
This work aims to prepare low-cost nanocomposite and microcomposite with lower molar ratio CaO/SiO2 (0.4). Nano-silica, rice husk ash and calcined chicken eggshell have been used as silica and calcium sources. Metakaolin has been separately replaced by 0, 10 and 20 wt% of each composite in order to study their behavior on the properties of geopolymers. The hardener used is sodium waterglass from rice husk ash. The surface area of nano-silica and rice husk ash was 54.40 and 4.08 m2/g, respectively. The cumulative volumes of the control geopolymer, the ones containing 10 wt% of microcomposite and nanocomposite are 119.71, 89.92 and 110.49 mm3/g, respectively. The compressive strength of the control specimen is around 64.02 MPa. The one using 10 wt% of microcomposite was 68.97 MPa. It drops to 42.88 MPa when metakaolin was replaced by 20 wt % of microcomposite. Whereas the one using 10 wt% of nanocomposite was 30.03 MPa and it decreases to 26.05 MPa when metakaolin was substituted by 20 wt% of nanocomposite. It can be concluded that 10 wt% of microcomposite could be mixed to metakaolin for strength development and nanocomposite does not recommend to use as an additive for producing high strength of geopolymer cements.
Keywords
- geopolymer cements, Metakaolin, microcomposite, nanocomposite, sodium waterglass
ASJC Scopus subject areas
- Materials Science(all)
- Ceramics and Composites
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In: Journal of Asian Ceramic Societies, Vol. 8, No. 1, 28.01.2020, p. 149-161.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Preparation of low-cost nano and microcomposites from chicken eggshell, nano-silica and rice husk ash and their utilisations as additives for producing geopolymer cements
AU - Tchakouté, H. K.
AU - Tchinda Mabah, D. E.
AU - Henning Rüscher, C.
AU - Kamseu, E.
AU - Andreola, F.
AU - Bignozzi, M. C.
AU - Leonelli, C.
N1 - Funding Information: Dr. Hervé Tchakouté Kouamo gratefully acknowledges the Alexander von Humboldt Foundation for financial support this work under the grant N° KAM/1155741 GFHERMES-P. The authors would like to thank Dr. Valerie Petrov for SEM observations.
PY - 2020/1/28
Y1 - 2020/1/28
N2 - This work aims to prepare low-cost nanocomposite and microcomposite with lower molar ratio CaO/SiO2 (0.4). Nano-silica, rice husk ash and calcined chicken eggshell have been used as silica and calcium sources. Metakaolin has been separately replaced by 0, 10 and 20 wt% of each composite in order to study their behavior on the properties of geopolymers. The hardener used is sodium waterglass from rice husk ash. The surface area of nano-silica and rice husk ash was 54.40 and 4.08 m2/g, respectively. The cumulative volumes of the control geopolymer, the ones containing 10 wt% of microcomposite and nanocomposite are 119.71, 89.92 and 110.49 mm3/g, respectively. The compressive strength of the control specimen is around 64.02 MPa. The one using 10 wt% of microcomposite was 68.97 MPa. It drops to 42.88 MPa when metakaolin was replaced by 20 wt % of microcomposite. Whereas the one using 10 wt% of nanocomposite was 30.03 MPa and it decreases to 26.05 MPa when metakaolin was substituted by 20 wt% of nanocomposite. It can be concluded that 10 wt% of microcomposite could be mixed to metakaolin for strength development and nanocomposite does not recommend to use as an additive for producing high strength of geopolymer cements.
AB - This work aims to prepare low-cost nanocomposite and microcomposite with lower molar ratio CaO/SiO2 (0.4). Nano-silica, rice husk ash and calcined chicken eggshell have been used as silica and calcium sources. Metakaolin has been separately replaced by 0, 10 and 20 wt% of each composite in order to study their behavior on the properties of geopolymers. The hardener used is sodium waterglass from rice husk ash. The surface area of nano-silica and rice husk ash was 54.40 and 4.08 m2/g, respectively. The cumulative volumes of the control geopolymer, the ones containing 10 wt% of microcomposite and nanocomposite are 119.71, 89.92 and 110.49 mm3/g, respectively. The compressive strength of the control specimen is around 64.02 MPa. The one using 10 wt% of microcomposite was 68.97 MPa. It drops to 42.88 MPa when metakaolin was replaced by 20 wt % of microcomposite. Whereas the one using 10 wt% of nanocomposite was 30.03 MPa and it decreases to 26.05 MPa when metakaolin was substituted by 20 wt% of nanocomposite. It can be concluded that 10 wt% of microcomposite could be mixed to metakaolin for strength development and nanocomposite does not recommend to use as an additive for producing high strength of geopolymer cements.
KW - geopolymer cements
KW - Metakaolin
KW - microcomposite
KW - nanocomposite
KW - sodium waterglass
UR - http://www.scopus.com/inward/record.url?scp=85078433871&partnerID=8YFLogxK
U2 - 10.1080/21870764.2020.1718860
DO - 10.1080/21870764.2020.1718860
M3 - Article
AN - SCOPUS:85078433871
VL - 8
SP - 149
EP - 161
JO - Journal of Asian Ceramic Societies
JF - Journal of Asian Ceramic Societies
IS - 1
ER -