Details
| Original language | English |
|---|---|
| Journal | Journal of Inorganic and Organometallic Polymers and Materials |
| Early online date | 13 Nov 2023 |
| Publication status | E-pub ahead of print - 13 Nov 2023 |
Abstract
Ferrisilicate was considered a crystalline zeolite containing iron (III) and silicon in the zeolite lattice positions. The aim of this work is to study the influence of Fe2O3/SiO2 molar ratios contained in the Fe-silica on the properties of geopolymer materials derived from waste fired clay brick and metakaolin. Fe-silica with various Fe2O3/SiO2 molar ratios of 0.2, 0.4, 0.6, 0.8 and 1.0 were synthesised using rice husk ash and hematite. 0 and 10 wt. % of each type of aluminosilicate is added to each type of Fe-silica. A commercial sodium silicate solution with a SiO2/Na2O molar ratio of 1.6 is used as a hardener. X-ray diffractometry and Fourier Transform Infrared spectroscopy are used for the characterisation of the Fe-silica and the geopolymers. In addition to these analyses, the compressive strengths of the geopolymer materials have been measured and the fragments obtained have been examined using a scanning electron microscope. The results show that the compressive strengths of metakaolin-based geopolymers increase from 53.34 to 69.08 MPa when the Fe2O3/SiO2 molar ratios contained in the Fe-silica are incremented from 0 to 0.8. When the Fe2O3/SiO2 molar ratio is increased from 0.8 to 1.0, they are reduced from 69.08 to 63.22 MPa. In contrast, those of geopolymer materials derived from waste fired clay brick decrease from 45.42 to 21.15 MPa when their Fe2O3/SiO2 molar ratios rise from 0 to 0.6 increases from 21.15 to 24.11 MPa beyond 0.6. The micrograph of the geopolymer material from the mixture of metakaolin and Fe-silica with a molar ratio of Fe2O3/SiO2 equal to 0.8 is more compact, homogeneous and partially smooth compared to other geopolymers. The presence of hematite and cristobalite, which act as fillers, is evident from the X-ray patterns of geopolymer materials after the addition of Fe-silica. This work shows that the addition of metakaolin to multi-molar of Fe-silica significantly improves the compressive strength of geopolymer materials. On the other hand, this addition leads to a reduction in the compressive strength when waste fired clay brick is used.
Keywords
- Fe-silica, Geopolymer materials, Hematite, Metakaolin, Rice husk ash, Waste fired clay brick
ASJC Scopus subject areas
- Materials Science(all)
- Polymers and Plastics
- Materials Science(all)
- Materials Chemistry
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In: Journal of Inorganic and Organometallic Polymers and Materials, 13.11.2023.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Effects of Fe2O3/SiO2 Molar Ratios in the Fe-Silica on the Compressive Strengths and Microstructural Properties of Geopolymer Materials Derived from Waste Fired Clay Brick and Metakaolin
AU - Tazune, Franklin Kenne
AU - Tchakouté, Hervé Kouamo
AU - Rüscher, Claus Henning
AU - Tchekwagep, Jean Jacques Kouadjo
AU - Hou, Pengkun
N1 - Funding Information: Pr. Hervé Tchakouté Kouamo gratefully acknowledges Alexander von Humboldt-Stiftung for financial support for this work under the Grant no N°KAM/1155741 GFHERMES-P.
PY - 2023/11/13
Y1 - 2023/11/13
N2 - Ferrisilicate was considered a crystalline zeolite containing iron (III) and silicon in the zeolite lattice positions. The aim of this work is to study the influence of Fe2O3/SiO2 molar ratios contained in the Fe-silica on the properties of geopolymer materials derived from waste fired clay brick and metakaolin. Fe-silica with various Fe2O3/SiO2 molar ratios of 0.2, 0.4, 0.6, 0.8 and 1.0 were synthesised using rice husk ash and hematite. 0 and 10 wt. % of each type of aluminosilicate is added to each type of Fe-silica. A commercial sodium silicate solution with a SiO2/Na2O molar ratio of 1.6 is used as a hardener. X-ray diffractometry and Fourier Transform Infrared spectroscopy are used for the characterisation of the Fe-silica and the geopolymers. In addition to these analyses, the compressive strengths of the geopolymer materials have been measured and the fragments obtained have been examined using a scanning electron microscope. The results show that the compressive strengths of metakaolin-based geopolymers increase from 53.34 to 69.08 MPa when the Fe2O3/SiO2 molar ratios contained in the Fe-silica are incremented from 0 to 0.8. When the Fe2O3/SiO2 molar ratio is increased from 0.8 to 1.0, they are reduced from 69.08 to 63.22 MPa. In contrast, those of geopolymer materials derived from waste fired clay brick decrease from 45.42 to 21.15 MPa when their Fe2O3/SiO2 molar ratios rise from 0 to 0.6 increases from 21.15 to 24.11 MPa beyond 0.6. The micrograph of the geopolymer material from the mixture of metakaolin and Fe-silica with a molar ratio of Fe2O3/SiO2 equal to 0.8 is more compact, homogeneous and partially smooth compared to other geopolymers. The presence of hematite and cristobalite, which act as fillers, is evident from the X-ray patterns of geopolymer materials after the addition of Fe-silica. This work shows that the addition of metakaolin to multi-molar of Fe-silica significantly improves the compressive strength of geopolymer materials. On the other hand, this addition leads to a reduction in the compressive strength when waste fired clay brick is used.
AB - Ferrisilicate was considered a crystalline zeolite containing iron (III) and silicon in the zeolite lattice positions. The aim of this work is to study the influence of Fe2O3/SiO2 molar ratios contained in the Fe-silica on the properties of geopolymer materials derived from waste fired clay brick and metakaolin. Fe-silica with various Fe2O3/SiO2 molar ratios of 0.2, 0.4, 0.6, 0.8 and 1.0 were synthesised using rice husk ash and hematite. 0 and 10 wt. % of each type of aluminosilicate is added to each type of Fe-silica. A commercial sodium silicate solution with a SiO2/Na2O molar ratio of 1.6 is used as a hardener. X-ray diffractometry and Fourier Transform Infrared spectroscopy are used for the characterisation of the Fe-silica and the geopolymers. In addition to these analyses, the compressive strengths of the geopolymer materials have been measured and the fragments obtained have been examined using a scanning electron microscope. The results show that the compressive strengths of metakaolin-based geopolymers increase from 53.34 to 69.08 MPa when the Fe2O3/SiO2 molar ratios contained in the Fe-silica are incremented from 0 to 0.8. When the Fe2O3/SiO2 molar ratio is increased from 0.8 to 1.0, they are reduced from 69.08 to 63.22 MPa. In contrast, those of geopolymer materials derived from waste fired clay brick decrease from 45.42 to 21.15 MPa when their Fe2O3/SiO2 molar ratios rise from 0 to 0.6 increases from 21.15 to 24.11 MPa beyond 0.6. The micrograph of the geopolymer material from the mixture of metakaolin and Fe-silica with a molar ratio of Fe2O3/SiO2 equal to 0.8 is more compact, homogeneous and partially smooth compared to other geopolymers. The presence of hematite and cristobalite, which act as fillers, is evident from the X-ray patterns of geopolymer materials after the addition of Fe-silica. This work shows that the addition of metakaolin to multi-molar of Fe-silica significantly improves the compressive strength of geopolymer materials. On the other hand, this addition leads to a reduction in the compressive strength when waste fired clay brick is used.
KW - Fe-silica
KW - Geopolymer materials
KW - Hematite
KW - Metakaolin
KW - Rice husk ash
KW - Waste fired clay brick
UR - http://www.scopus.com/inward/record.url?scp=85176550252&partnerID=8YFLogxK
U2 - 10.1007/s10904-023-02913-4
DO - 10.1007/s10904-023-02913-4
M3 - Article
AN - SCOPUS:85176550252
JO - Journal of Inorganic and Organometallic Polymers and Materials
JF - Journal of Inorganic and Organometallic Polymers and Materials
SN - 1574-1443
ER -