Details
| Original language | English |
|---|---|
| Pages (from-to) | 3563-3570 |
| Number of pages | 8 |
| Journal | Silicon |
| Volume | 14 |
| Issue number | 7 |
| Early online date | 6 May 2021 |
| Publication status | Published - May 2022 |
Abstract
This work explores the possibility of using Mine tailing (MT) as a feedstock in the synthesis of phosphate geopolymer binder. MT was activated at different concentrations of phosphoric acid (4, 6, 8, 10 and 12 M). The modification of the Si/Al weight ratio was done by the incorporation of 5, 10, 15, 20 and 25 wt% of calcined kaolinite (CK). After 28 days of curing, the products obtained were analyzed using XRD, FTIR, compressive strength and water absorption. The results of the XRD and FTIR analyses reveal a partial dissolution of the crystalline phase of iron oxide in this medium and the formation of aluminium phosphate hydrate as new crystalline phase. The optimum values of compressive strength (45.5 MPa) and water absorption (3.0 %) show that the binder obtained by activation with 6 M phosphoric acid and 10 wt% CK incorporation can be used in the manufacture of structural materials. Acid activation of MT thus appears as an innovative way to recycle these fine wastes in the synthesis of geopolymer.
Keywords
- Calcined kaolinite, Green binder, Mine tailing, Phosphate geopolymer
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
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In: Silicon, Vol. 14, No. 7, 05.2022, p. 3563-3570.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Structural and Physico-mechanical Investigations of Mine Tailing-Calcined Kaolinite Based Phosphate Geopolymer Binder
AU - Tome, Sylvain
AU - Bewa, Christelle N.
AU - Nana, Achile
AU - Deutou Nemaleu, Juvenal G.
AU - Etoh, Marie A.
AU - Tchakouté, Hervé K.
AU - Kumar, Sanjay
AU - Etame, Jacques
N1 - Funding Information: The authors thank the CSIR-National Metallurgical Laboratory (Jamshedpur-India) for the characterization of raw materials and the Institut f?r Mineralogie, Leibniz Universit?t Hannover, Callinstrasse 3 (Germany) for the characterization of geopolymer samples. We also thank BOCOM (Missisauga Mining & Exploration Cameroon) for the supplying of the mine tailing.
PY - 2022/5
Y1 - 2022/5
N2 - This work explores the possibility of using Mine tailing (MT) as a feedstock in the synthesis of phosphate geopolymer binder. MT was activated at different concentrations of phosphoric acid (4, 6, 8, 10 and 12 M). The modification of the Si/Al weight ratio was done by the incorporation of 5, 10, 15, 20 and 25 wt% of calcined kaolinite (CK). After 28 days of curing, the products obtained were analyzed using XRD, FTIR, compressive strength and water absorption. The results of the XRD and FTIR analyses reveal a partial dissolution of the crystalline phase of iron oxide in this medium and the formation of aluminium phosphate hydrate as new crystalline phase. The optimum values of compressive strength (45.5 MPa) and water absorption (3.0 %) show that the binder obtained by activation with 6 M phosphoric acid and 10 wt% CK incorporation can be used in the manufacture of structural materials. Acid activation of MT thus appears as an innovative way to recycle these fine wastes in the synthesis of geopolymer.
AB - This work explores the possibility of using Mine tailing (MT) as a feedstock in the synthesis of phosphate geopolymer binder. MT was activated at different concentrations of phosphoric acid (4, 6, 8, 10 and 12 M). The modification of the Si/Al weight ratio was done by the incorporation of 5, 10, 15, 20 and 25 wt% of calcined kaolinite (CK). After 28 days of curing, the products obtained were analyzed using XRD, FTIR, compressive strength and water absorption. The results of the XRD and FTIR analyses reveal a partial dissolution of the crystalline phase of iron oxide in this medium and the formation of aluminium phosphate hydrate as new crystalline phase. The optimum values of compressive strength (45.5 MPa) and water absorption (3.0 %) show that the binder obtained by activation with 6 M phosphoric acid and 10 wt% CK incorporation can be used in the manufacture of structural materials. Acid activation of MT thus appears as an innovative way to recycle these fine wastes in the synthesis of geopolymer.
KW - Calcined kaolinite
KW - Green binder
KW - Mine tailing
KW - Phosphate geopolymer
UR - http://www.scopus.com/inward/record.url?scp=85105525317&partnerID=8YFLogxK
U2 - 10.1007/s12633-021-01137-w
DO - 10.1007/s12633-021-01137-w
M3 - Article
AN - SCOPUS:85105525317
VL - 14
SP - 3563
EP - 3570
JO - Silicon
JF - Silicon
SN - 1876-990X
IS - 7
ER -