Flexural Toughness of Basalt Fibre-Reinforced Shotcrete and Industrial-Scale Testing
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...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2019/6568057 |
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| author | Huazhe Jiao Yachuang Wu Xinming Chen Yixuan Yang |
| author_facet | Huazhe Jiao Yachuang Wu Xinming Chen Yixuan Yang |
| author_sort | Huazhe Jiao |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-8a2ba7765c204ec79b8e2945eb8c1509 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-8a2ba7765c204ec79b8e2945eb8c15092025-02-03T06:42:08ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422019-01-01201910.1155/2019/65680576568057Flexural Toughness of Basalt Fibre-Reinforced Shotcrete and Industrial-Scale TestingHuazhe Jiao0Yachuang Wu1Xinming Chen2Yixuan Yang3School of Civil Engineering, Henan Polytechnic University, Jiaozuo, Henan, ChinaSchool of Civil Engineering, Henan Polytechnic University, Jiaozuo, Henan, ChinaSchool of Civil Engineering, Henan Polytechnic University, Jiaozuo, Henan, ChinaInstitute of Recourses and Environment, Henan Polytechnic University, Jiaozuo, Henan, ChinaThis 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.http://dx.doi.org/10.1155/2019/6568057 |
| spellingShingle | Huazhe Jiao Yachuang Wu Xinming Chen Yixuan Yang Flexural Toughness of Basalt Fibre-Reinforced Shotcrete and Industrial-Scale Testing Advances in Materials Science and Engineering |
| title | Flexural Toughness of Basalt Fibre-Reinforced Shotcrete and Industrial-Scale Testing |
| title_full | Flexural Toughness of Basalt Fibre-Reinforced Shotcrete and Industrial-Scale Testing |
| title_fullStr | Flexural Toughness of Basalt Fibre-Reinforced Shotcrete and Industrial-Scale Testing |
| title_full_unstemmed | Flexural Toughness of Basalt Fibre-Reinforced Shotcrete and Industrial-Scale Testing |
| title_short | Flexural Toughness of Basalt Fibre-Reinforced Shotcrete and Industrial-Scale Testing |
| title_sort | flexural toughness of basalt fibre reinforced shotcrete and industrial scale testing |
| url | http://dx.doi.org/10.1155/2019/6568057 |
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