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    Rights statement: This is the author’s version of a work that was accepted for publication in Cement and Concrete Composites. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Cement and Concrete Composites, 127, 2022 DOI: 10.1016/j.cemconcomp.2022.104407

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Phase dissolution and improving properties of completely decomposed granite through alkali fusion method

Research output: Contribution to Journal/MagazineJournal articlepeer-review

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Phase dissolution and improving properties of completely decomposed granite through alkali fusion method. / Dassekpo, J.-B.M.; Miao, L.; Bai, J.; Gong, Q.; Shao, N.N.; Dong, Z.; Xing, F.; Ye, J.

In: Cement and Concrete Composites, Vol. 127, 104407, 31.03.2022.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

Dassekpo, J-BM, Miao, L, Bai, J, Gong, Q, Shao, NN, Dong, Z, Xing, F & Ye, J 2022, 'Phase dissolution and improving properties of completely decomposed granite through alkali fusion method', Cement and Concrete Composites, vol. 127, 104407. https://doi.org/10.1016/j.cemconcomp.2022.104407

APA

Dassekpo, J-BM., Miao, L., Bai, J., Gong, Q., Shao, N. N., Dong, Z., Xing, F., & Ye, J. (2022). Phase dissolution and improving properties of completely decomposed granite through alkali fusion method. Cement and Concrete Composites, 127, [104407]. https://doi.org/10.1016/j.cemconcomp.2022.104407

Vancouver

Dassekpo J-BM, Miao L, Bai J, Gong Q, Shao NN, Dong Z et al. Phase dissolution and improving properties of completely decomposed granite through alkali fusion method. Cement and Concrete Composites. 2022 Mar 31;127. 104407. https://doi.org/10.1016/j.cemconcomp.2022.104407

Author

Dassekpo, J.-B.M. ; Miao, L. ; Bai, J. ; Gong, Q. ; Shao, N.N. ; Dong, Z. ; Xing, F. ; Ye, J. / Phase dissolution and improving properties of completely decomposed granite through alkali fusion method. In: Cement and Concrete Composites. 2022 ; Vol. 127.

Bibtex

@article{e39872e5c98a41f5aacb2ce094b6fe96,
title = "Phase dissolution and improving properties of completely decomposed granite through alkali fusion method",
abstract = "Low-reactive completely decomposed granite (CDG) was successfully synthesized by thermal activation with the addition of NaOH at low alkali/CDG mass ratio of 0.1/1. During alkali fusion, the degree of amorphicity of CDG rich in kaolinite (Al2Si2O5(OH)4) increased and a significant reduction of the peak intensities occurring between 20 and 45 (o2 theta) was observed. Reactivity analysis indicated that, initial CDG requires high molar NaOH to provide a proper dissolution, whereas fused CDG exhibits high reactivity (29Si = 555.57 ppm; 27Al = 223.73 ppm) at low NaOH concentration. Moreover, results from the setting time, varied between 15 and 45 min, indicating that alkali fusion is very effective for improving the dissolution of the fused CDG under Na2SiO3 solution. However, the setting time decreases as the reaction degree accelerates. FTIR analysis of the fused CDG presented lower wavenumber band of around 975 cm−1, confirming a decline of crystalline phases. In addition, SEM-EDS characterization and alkalinity analysis showed a compactness of the structure due to the liberation of enough sodium aluminosilicate gel. Finally, results from the mechanical test (4.75–39.55 MPa) and water solubility inferred that, by enhancing the reactivity of CDG by alkali fusion and by addition of up to 15% GGBS, CDG can be optimally recycled as an alternative source material to produce geopolymers. ",
keywords = "Alkali fusion, Alkali-activated binder, Completely decomposed granite, Dissolution, Reactivity, Setting time, Aluminum compounds, Granite, Kaolinite, Silicon, Sodium hydroxide, Structure (composition), Fusion methods, Phase dissolution, Property, Synthesised, Thermal activation",
author = "J.-B.M. Dassekpo and L. Miao and J. Bai and Q. Gong and N.N. Shao and Z. Dong and F. Xing and J. Ye",
note = "This is the author{\textquoteright}s version of a work that was accepted for publication in Cement and Concrete Composites. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Cement and Concrete Composites, 127, 2022 DOI: 10.1016/j.cemconcomp.2022.104407",
year = "2022",
month = mar,
day = "31",
doi = "10.1016/j.cemconcomp.2022.104407",
language = "English",
volume = "127",
journal = "Cement and Concrete Composites",
issn = "0958-9465",
publisher = "Elsevier Limited",

}

RIS

TY - JOUR

T1 - Phase dissolution and improving properties of completely decomposed granite through alkali fusion method

AU - Dassekpo, J.-B.M.

AU - Miao, L.

AU - Bai, J.

AU - Gong, Q.

AU - Shao, N.N.

AU - Dong, Z.

AU - Xing, F.

AU - Ye, J.

N1 - This is the author’s version of a work that was accepted for publication in Cement and Concrete Composites. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Cement and Concrete Composites, 127, 2022 DOI: 10.1016/j.cemconcomp.2022.104407

PY - 2022/3/31

Y1 - 2022/3/31

N2 - Low-reactive completely decomposed granite (CDG) was successfully synthesized by thermal activation with the addition of NaOH at low alkali/CDG mass ratio of 0.1/1. During alkali fusion, the degree of amorphicity of CDG rich in kaolinite (Al2Si2O5(OH)4) increased and a significant reduction of the peak intensities occurring between 20 and 45 (o2 theta) was observed. Reactivity analysis indicated that, initial CDG requires high molar NaOH to provide a proper dissolution, whereas fused CDG exhibits high reactivity (29Si = 555.57 ppm; 27Al = 223.73 ppm) at low NaOH concentration. Moreover, results from the setting time, varied between 15 and 45 min, indicating that alkali fusion is very effective for improving the dissolution of the fused CDG under Na2SiO3 solution. However, the setting time decreases as the reaction degree accelerates. FTIR analysis of the fused CDG presented lower wavenumber band of around 975 cm−1, confirming a decline of crystalline phases. In addition, SEM-EDS characterization and alkalinity analysis showed a compactness of the structure due to the liberation of enough sodium aluminosilicate gel. Finally, results from the mechanical test (4.75–39.55 MPa) and water solubility inferred that, by enhancing the reactivity of CDG by alkali fusion and by addition of up to 15% GGBS, CDG can be optimally recycled as an alternative source material to produce geopolymers.

AB - Low-reactive completely decomposed granite (CDG) was successfully synthesized by thermal activation with the addition of NaOH at low alkali/CDG mass ratio of 0.1/1. During alkali fusion, the degree of amorphicity of CDG rich in kaolinite (Al2Si2O5(OH)4) increased and a significant reduction of the peak intensities occurring between 20 and 45 (o2 theta) was observed. Reactivity analysis indicated that, initial CDG requires high molar NaOH to provide a proper dissolution, whereas fused CDG exhibits high reactivity (29Si = 555.57 ppm; 27Al = 223.73 ppm) at low NaOH concentration. Moreover, results from the setting time, varied between 15 and 45 min, indicating that alkali fusion is very effective for improving the dissolution of the fused CDG under Na2SiO3 solution. However, the setting time decreases as the reaction degree accelerates. FTIR analysis of the fused CDG presented lower wavenumber band of around 975 cm−1, confirming a decline of crystalline phases. In addition, SEM-EDS characterization and alkalinity analysis showed a compactness of the structure due to the liberation of enough sodium aluminosilicate gel. Finally, results from the mechanical test (4.75–39.55 MPa) and water solubility inferred that, by enhancing the reactivity of CDG by alkali fusion and by addition of up to 15% GGBS, CDG can be optimally recycled as an alternative source material to produce geopolymers.

KW - Alkali fusion

KW - Alkali-activated binder

KW - Completely decomposed granite

KW - Dissolution

KW - Reactivity

KW - Setting time

KW - Aluminum compounds

KW - Granite

KW - Kaolinite

KW - Silicon

KW - Sodium hydroxide

KW - Structure (composition)

KW - Fusion methods

KW - Phase dissolution

KW - Property

KW - Synthesised

KW - Thermal activation

U2 - 10.1016/j.cemconcomp.2022.104407

DO - 10.1016/j.cemconcomp.2022.104407

M3 - Journal article

VL - 127

JO - Cement and Concrete Composites

JF - Cement and Concrete Composites

SN - 0958-9465

M1 - 104407

ER -