Details
| Original language | English |
|---|---|
| Pages (from-to) | 2235-2247 |
| Number of pages | 13 |
| Journal | Silicon |
| Volume | 14 |
| Issue number | 5 |
| Early online date | 24 Feb 2021 |
| Publication status | Published - Apr 2022 |
Abstract
This work aims to study the pore analysis and the behaviour of the unreacted metakaolin particles in the geopolymer cements from halloysitic and kaolinitic clays. The XRD patterns of the geopolymer cements show the unreacted metakaolin particles at about 21 °(2θ). The micrography images of the specimen from calcined kaolinitic clay confirm the presence of the unreacted metakaolin particles except the one using calcined kaolinitic clay from Bangoua. Whereas those from calcined halloysitic clay are compacts, homogeneous and denser microstructure. The compressive strength of the specimen from calcined halloysitic clay (88.50 ± 2.08 MPa) is higher compared to those from calcined kaolinitic clays (between 45.43 ± 1.84 and 57.20 ± 1.09 MPa). The pore analysis shows that the pore size diameters of the specimen from calcined halloysitic clay are in the range 7.4–16.2 nm while those from calcined kaolinitic clays are ranging from 5.5 to 12.3 nm. It was found that although the geopolymer cement from calcined halloysitic clay contains more unreacted metakaolin particles, it possesses the mesopores due to the inclusion of these fine unreacted metakaolin particles in its structure.
Keywords
- Calcined halloysitic clay, Calcined kaolinitic clay, Compressive strengths, Geopolymer cements, Micrography, Pore analysis
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
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In: Silicon, Vol. 14, No. 5, 04.2022, p. 2235-2247.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Pore Analysis and the Behaviour of the Unreacted Metakaolin Particles in the Networks of Geopolymer Cements Using Metakaolins From Kaolinitic and Halloysitic Clays
AU - Melele, S. J.K.
AU - Tchakouté, Hervé Kouamo
AU - Banenzoué, C.
AU - Hseumou, E. L.
AU - Nanseu-Njiki, C. P.
AU - Rüscher, C. H.
N1 - Funding Information: Dr. Tchakouté Kouamo Hervé gratefully acknowledges the Alexander von Humboldt-Stiftung for its financial support this work under grant N KAM/1155741 GFHERMES-P . °
PY - 2022/4
Y1 - 2022/4
N2 - This work aims to study the pore analysis and the behaviour of the unreacted metakaolin particles in the geopolymer cements from halloysitic and kaolinitic clays. The XRD patterns of the geopolymer cements show the unreacted metakaolin particles at about 21 °(2θ). The micrography images of the specimen from calcined kaolinitic clay confirm the presence of the unreacted metakaolin particles except the one using calcined kaolinitic clay from Bangoua. Whereas those from calcined halloysitic clay are compacts, homogeneous and denser microstructure. The compressive strength of the specimen from calcined halloysitic clay (88.50 ± 2.08 MPa) is higher compared to those from calcined kaolinitic clays (between 45.43 ± 1.84 and 57.20 ± 1.09 MPa). The pore analysis shows that the pore size diameters of the specimen from calcined halloysitic clay are in the range 7.4–16.2 nm while those from calcined kaolinitic clays are ranging from 5.5 to 12.3 nm. It was found that although the geopolymer cement from calcined halloysitic clay contains more unreacted metakaolin particles, it possesses the mesopores due to the inclusion of these fine unreacted metakaolin particles in its structure.
AB - This work aims to study the pore analysis and the behaviour of the unreacted metakaolin particles in the geopolymer cements from halloysitic and kaolinitic clays. The XRD patterns of the geopolymer cements show the unreacted metakaolin particles at about 21 °(2θ). The micrography images of the specimen from calcined kaolinitic clay confirm the presence of the unreacted metakaolin particles except the one using calcined kaolinitic clay from Bangoua. Whereas those from calcined halloysitic clay are compacts, homogeneous and denser microstructure. The compressive strength of the specimen from calcined halloysitic clay (88.50 ± 2.08 MPa) is higher compared to those from calcined kaolinitic clays (between 45.43 ± 1.84 and 57.20 ± 1.09 MPa). The pore analysis shows that the pore size diameters of the specimen from calcined halloysitic clay are in the range 7.4–16.2 nm while those from calcined kaolinitic clays are ranging from 5.5 to 12.3 nm. It was found that although the geopolymer cement from calcined halloysitic clay contains more unreacted metakaolin particles, it possesses the mesopores due to the inclusion of these fine unreacted metakaolin particles in its structure.
KW - Calcined halloysitic clay
KW - Calcined kaolinitic clay
KW - Compressive strengths
KW - Geopolymer cements
KW - Micrography
KW - Pore analysis
UR - http://www.scopus.com/inward/record.url?scp=85101503081&partnerID=8YFLogxK
U2 - 10.1007/s12633-021-01021-7
DO - 10.1007/s12633-021-01021-7
M3 - Article
AN - SCOPUS:85101503081
VL - 14
SP - 2235
EP - 2247
JO - Silicon
JF - Silicon
SN - 1876-990X
IS - 5
ER -