Deterioration and Microstructural Evolution of the Fly Ash Geopolymer Concrete against MgSO4 Solution
Joint Authors
Guan, Zhongwei
Wang, Qingyuan
Long, Tao
Chen, Yu
Shi, Xiaoshuang
Source
Advances in Materials Science and Engineering
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-10-16
Country of Publication
Egypt
No. of Pages
11
Abstract EN
Fly ash geopolymer concrete (FAGC) and ordinary Portland cement concrete (OPCC) specimens were immersed in 5% MgSO4 solution undergoing 32 wetting-drying and heating-cooling cycles.
Their compressive behavior was investigated after every 8 cycles.
Several microstructure analysis techniques were applied on the samples to identify the materials formed due to magnesium sulfate attack, including XRD, FTIR, SEM, and EDS.
Experimental results elucidated that the compressive strength loss ratio in the heating group of FAGC was 12.7%, while that of OPCC was 17.8%, which means that FAGC had better magnesium sulfate resistance than OPCC.
The compressive strength loss of OPCC was due to the formation of gypsum under the magnesium sulfate attack exposed to wetting-drying and heating-cooling cycles.
The deterioration mechanisms of FAGC against MgSO4 solution were discovered to be that sodium aluminum silicate hydrate (N-A-S-H) gels reacted with MgSO4, leading to the creation of low strength magnesium aluminum silicate hydrate (M-A-S-H) gels.
American Psychological Association (APA)
Long, Tao& Wang, Qingyuan& Guan, Zhongwei& Chen, Yu& Shi, Xiaoshuang. 2017. Deterioration and Microstructural Evolution of the Fly Ash Geopolymer Concrete against MgSO4 Solution. Advances in Materials Science and Engineering،Vol. 2017, no. 2017, pp.1-11.
https://search.emarefa.net/detail/BIM-1124048
Modern Language Association (MLA)
Long, Tao…[et al.]. Deterioration and Microstructural Evolution of the Fly Ash Geopolymer Concrete against MgSO4 Solution. Advances in Materials Science and Engineering No. 2017 (2017), pp.1-11.
https://search.emarefa.net/detail/BIM-1124048
American Medical Association (AMA)
Long, Tao& Wang, Qingyuan& Guan, Zhongwei& Chen, Yu& Shi, Xiaoshuang. Deterioration and Microstructural Evolution of the Fly Ash Geopolymer Concrete against MgSO4 Solution. Advances in Materials Science and Engineering. 2017. Vol. 2017, no. 2017, pp.1-11.
https://search.emarefa.net/detail/BIM-1124048
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1124048