Flexural Toughness of Basalt Fibre-Reinforced Shotcrete and Industrial-Scale Testing
Joint Authors
Jiao, Huazhe
Wu, Yachuang
Chen, Xinming
Yang, Yixuan
Source
Advances in Materials Science and Engineering
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-10-31
Country of Publication
Egypt
No. of Pages
8
Abstract EN
This study focuses on toughness enhancement of basalt fibre-reinforced shotcrete (BFRS).
Four-point bending experiments of underground shooting and curing beams combined with a roadway-supporting deformation monitoring test were conducted.
The flexural performance was analysed based on the toughness standards, namely, DBV-1998, JSCE SF-4, and nuclear magnetic resonance (NMR) pore testing.
The results demonstrate that, given a basalt fibre (BF) dosage of 0–7.5 kg/m3, 18 mm BF can significantly increase the residual stress under the same deformation, rather than the peak values of the flexural strength.
Meanwhile, the trend in the flexural toughness increases to a peak at a dosage of 3–4.5 kg/m3, followed by a declining curve.
The pores from an NMR test can be divided into three types based on size: (1) closed pores, R < 0.01 μm, (2) capillary pores, 0.01 μm < R < 5 μm, and (3) connected pores, R > 5 μm.
The connected pores are detrimental, playing a crucial role in the shotcrete performance.
Furthermore, the deformations of the roadway walls are significantly restrained by the BFRS, and the 80-day convergences are approximately 2 mm, which is only 25% of the control.
Finally, the comprehensive results indicate that a dosage range of 3–4.5 kg/m3 can demonstrate reasonable beneficial effects for the BFRS performance.
American Psychological Association (APA)
Jiao, Huazhe& Wu, Yachuang& Chen, Xinming& Yang, Yixuan. 2019. Flexural Toughness of Basalt Fibre-Reinforced Shotcrete and Industrial-Scale Testing. Advances in Materials Science and Engineering،Vol. 2019, no. 2019, pp.1-8.
https://search.emarefa.net/detail/BIM-1120509
Modern Language Association (MLA)
Jiao, Huazhe…[et al.]. Flexural Toughness of Basalt Fibre-Reinforced Shotcrete and Industrial-Scale Testing. Advances in Materials Science and Engineering No. 2019 (2019), pp.1-8.
https://search.emarefa.net/detail/BIM-1120509
American Medical Association (AMA)
Jiao, Huazhe& Wu, Yachuang& Chen, Xinming& Yang, Yixuan. Flexural Toughness of Basalt Fibre-Reinforced Shotcrete and Industrial-Scale Testing. Advances in Materials Science and Engineering. 2019. Vol. 2019, no. 2019, pp.1-8.
https://search.emarefa.net/detail/BIM-1120509
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1120509