Effects of Corn Stalk Fly Ash (CSFA) on the Mechanical and Deformation Properties of Cemented Coal Gangue Backfill
Joint Authors
Qi, Tingye
Du, Xianjie
Wang, Zehua
Feng, Guorui
Wang, Haochen
Zhang, Shufeng
Source
Advances in Materials Science and Engineering
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-14, 14 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-02-11
Country of Publication
Egypt
No. of Pages
14
Abstract EN
To reduce the amount of cement used in cemented coal gangue backfill (CCGB, a mixture of coal gangue, cement, fly ash, and water), mechanical and deformation properties of CCGB in which CSFA partially replaces the cement (0, 10, 20, 30, and 40 wt%) were studied.
Compressive strength, acoustic emission during uniaxial loading, shear strength, and drying shrinkage were analysed.
The compressive strength, shear strength, and drying shrinkage tests were performed at different curing times.
The results showed that cemented coal gangue and corn stalk fly ash backfill (CGCAB) presented better performance, and the CGCAB with a 20% substitution rate had the best performance at day 28.
Despite having the largest drying shrinkage value, 20% is the best choice for the substitution rate of CSFA.
A 20% CSFA addition can enhance the bearing capacity of CGCAB and improve its failure mode, which is of great significance to support the upper overburden load and maintain the surface stability of the goaf.
American Psychological Association (APA)
Qi, Tingye& Wang, Haochen& Feng, Guorui& Du, Xianjie& Wang, Zehua& Zhang, Shufeng. 2020. Effects of Corn Stalk Fly Ash (CSFA) on the Mechanical and Deformation Properties of Cemented Coal Gangue Backfill. Advances in Materials Science and Engineering،Vol. 2020, no. 2020, pp.1-14.
https://search.emarefa.net/detail/BIM-1129082
Modern Language Association (MLA)
Qi, Tingye…[et al.]. Effects of Corn Stalk Fly Ash (CSFA) on the Mechanical and Deformation Properties of Cemented Coal Gangue Backfill. Advances in Materials Science and Engineering No. 2020 (2020), pp.1-14.
https://search.emarefa.net/detail/BIM-1129082
American Medical Association (AMA)
Qi, Tingye& Wang, Haochen& Feng, Guorui& Du, Xianjie& Wang, Zehua& Zhang, Shufeng. Effects of Corn Stalk Fly Ash (CSFA) on the Mechanical and Deformation Properties of Cemented Coal Gangue Backfill. Advances in Materials Science and Engineering. 2020. Vol. 2020, no. 2020, pp.1-14.
https://search.emarefa.net/detail/BIM-1129082
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1129082