Microstructure and Composition of Red Mud-Fly Ash-Based Geopolymers Incorporating Carbide Slag
In order to find the possibility of recycling an industry waste solid red mud from earth, a kind of geopolymer material system based on red mud-fly ash-carbide slag has been developed entirely from waste. The microstructure and composition of the geopolymer material system at the age of 28 days was...
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doaj-62aaa5b4dbba44ef86c02d004f3487292020-11-25T04:01:35ZengFrontiers Media S.A.Frontiers in Materials2296-80162020-11-01710.3389/fmats.2020.563233563233Microstructure and Composition of Red Mud-Fly Ash-Based Geopolymers Incorporating Carbide SlagYuxuan Shi0Yuxuan Shi1Zhaoyun Zhang2Zhaohu Sang3Qingxin Zhao4Qingxin Zhao5State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, ChinaKey Laboratory of Green Construction and Intelligent Maintenance for Civil Engineering of Hebei Province, Yanshan University, Qinhuangdao, ChinaTangshan Sanyou Alkali Chloride Co., Ltd., Tangshan, ChinaTangshan Sanyou Alkali Chloride Co., Ltd., Tangshan, ChinaState Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, ChinaKey Laboratory of Green Construction and Intelligent Maintenance for Civil Engineering of Hebei Province, Yanshan University, Qinhuangdao, ChinaIn order to find the possibility of recycling an industry waste solid red mud from earth, a kind of geopolymer material system based on red mud-fly ash-carbide slag has been developed entirely from waste. The microstructure and composition of the geopolymer material system at the age of 28 days was tested by the scanning electron microscope (SEM), back scattered electron (BSE), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and thermogravimetric-differential scanning calorimetry (DSC-TG). It was showed that the compressive strength of the geopolymer sample was 15.1 MPa when the liquid solid ratio (L/S) was 0.7, sand-binder ratio was 3:1, alkaline activator used wet-based carbide slag, and the fly ash, red mud and carbide slag were prepared as the proportion of 4:3:3. Through scanning electron microscope, back scattered electron, energy dispersive spectroscopy, X-ray diffraction, and thermogravimetric-differential scanning calorimetry results, the spherical beads in fly ash were dissolved in the alkaline environment to form silicon and aluminum monomers and polymerized to synthesize C-S-H and C-A-S-H gels. Wet-based carbide slag played the role of calcium component support in C-A-S-H, C-S-H gels and alkaline activator.https://www.frontiersin.org/articles/10.3389/fmats.2020.563233/fullgeopolymerred mudfly ashcarbide slagalkali-activated |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yuxuan Shi Yuxuan Shi Zhaoyun Zhang Zhaohu Sang Qingxin Zhao Qingxin Zhao |
spellingShingle |
Yuxuan Shi Yuxuan Shi Zhaoyun Zhang Zhaohu Sang Qingxin Zhao Qingxin Zhao Microstructure and Composition of Red Mud-Fly Ash-Based Geopolymers Incorporating Carbide Slag Frontiers in Materials geopolymer red mud fly ash carbide slag alkali-activated |
author_facet |
Yuxuan Shi Yuxuan Shi Zhaoyun Zhang Zhaohu Sang Qingxin Zhao Qingxin Zhao |
author_sort |
Yuxuan Shi |
title |
Microstructure and Composition of Red Mud-Fly Ash-Based Geopolymers Incorporating Carbide Slag |
title_short |
Microstructure and Composition of Red Mud-Fly Ash-Based Geopolymers Incorporating Carbide Slag |
title_full |
Microstructure and Composition of Red Mud-Fly Ash-Based Geopolymers Incorporating Carbide Slag |
title_fullStr |
Microstructure and Composition of Red Mud-Fly Ash-Based Geopolymers Incorporating Carbide Slag |
title_full_unstemmed |
Microstructure and Composition of Red Mud-Fly Ash-Based Geopolymers Incorporating Carbide Slag |
title_sort |
microstructure and composition of red mud-fly ash-based geopolymers incorporating carbide slag |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Materials |
issn |
2296-8016 |
publishDate |
2020-11-01 |
description |
In order to find the possibility of recycling an industry waste solid red mud from earth, a kind of geopolymer material system based on red mud-fly ash-carbide slag has been developed entirely from waste. The microstructure and composition of the geopolymer material system at the age of 28 days was tested by the scanning electron microscope (SEM), back scattered electron (BSE), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and thermogravimetric-differential scanning calorimetry (DSC-TG). It was showed that the compressive strength of the geopolymer sample was 15.1 MPa when the liquid solid ratio (L/S) was 0.7, sand-binder ratio was 3:1, alkaline activator used wet-based carbide slag, and the fly ash, red mud and carbide slag were prepared as the proportion of 4:3:3. Through scanning electron microscope, back scattered electron, energy dispersive spectroscopy, X-ray diffraction, and thermogravimetric-differential scanning calorimetry results, the spherical beads in fly ash were dissolved in the alkaline environment to form silicon and aluminum monomers and polymerized to synthesize C-S-H and C-A-S-H gels. Wet-based carbide slag played the role of calcium component support in C-A-S-H, C-S-H gels and alkaline activator. |
topic |
geopolymer red mud fly ash carbide slag alkali-activated |
url |
https://www.frontiersin.org/articles/10.3389/fmats.2020.563233/full |
work_keys_str_mv |
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