Experimental Study on Mechanical Properties of Cemented Paste Backfill under Temperature-Chemical Coupling Conditions
To investigate the effect of temperature-chemical coupling on the mechanical properties of cemented paste backfill, three temperatures (20°C, 35°C, and 50°C) and sodium sulfate solution mass concentrations (3%, 5%, and 7%) are applied to simulate the complex environment in a mine. Uniaxial compressi...
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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/10.1155/2019/9754790 |
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| author | Yin Liu Hao Li Haifeng Wu |
| author_facet | Yin Liu Hao Li Haifeng Wu |
| author_sort | Yin Liu |
| collection | DOAJ |
| description | To investigate the effect of temperature-chemical coupling on the mechanical properties of cemented paste backfill, three temperatures (20°C, 35°C, and 50°C) and sodium sulfate solution mass concentrations (3%, 5%, and 7%) are applied to simulate the complex environment in a mine. Uniaxial compressive strength and the CPB stress-strain relationship are investigated by applying stress, and the deterioration mechanism was analyzed theoretically according to physical and chemical reactions. At the same time, a structural model of the CPB deterioration mechanism under TC coupling is constructed. Combined with analysis through X-ray diffraction and scanning electron microscopy, it is shown that ettringite and gypsum are the main erosive substances that destroy the structure of CPB and that increased temperatures accelerate the chemical reaction. The concentration change consumes calcium hydroxide, changing the relationship between ettringite and gypsum. Sodium sulphate crystallization is the main form of physical deterioration. The continuous load accelerates the inelastic deformation time of CPB, resulting in a large yield deformation process. |
| format | Article |
| id | doaj-art-d4e05f4cb2374beeb983b04469fbf630 |
| 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-d4e05f4cb2374beeb983b04469fbf6302025-02-03T01:03:07ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422019-01-01201910.1155/2019/97547909754790Experimental Study on Mechanical Properties of Cemented Paste Backfill under Temperature-Chemical Coupling ConditionsYin Liu0Hao Li1Haifeng Wu2College Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaTo investigate the effect of temperature-chemical coupling on the mechanical properties of cemented paste backfill, three temperatures (20°C, 35°C, and 50°C) and sodium sulfate solution mass concentrations (3%, 5%, and 7%) are applied to simulate the complex environment in a mine. Uniaxial compressive strength and the CPB stress-strain relationship are investigated by applying stress, and the deterioration mechanism was analyzed theoretically according to physical and chemical reactions. At the same time, a structural model of the CPB deterioration mechanism under TC coupling is constructed. Combined with analysis through X-ray diffraction and scanning electron microscopy, it is shown that ettringite and gypsum are the main erosive substances that destroy the structure of CPB and that increased temperatures accelerate the chemical reaction. The concentration change consumes calcium hydroxide, changing the relationship between ettringite and gypsum. Sodium sulphate crystallization is the main form of physical deterioration. The continuous load accelerates the inelastic deformation time of CPB, resulting in a large yield deformation process.http://dx.doi.org/10.1155/2019/9754790 |
| spellingShingle | Yin Liu Hao Li Haifeng Wu Experimental Study on Mechanical Properties of Cemented Paste Backfill under Temperature-Chemical Coupling Conditions Advances in Materials Science and Engineering |
| title | Experimental Study on Mechanical Properties of Cemented Paste Backfill under Temperature-Chemical Coupling Conditions |
| title_full | Experimental Study on Mechanical Properties of Cemented Paste Backfill under Temperature-Chemical Coupling Conditions |
| title_fullStr | Experimental Study on Mechanical Properties of Cemented Paste Backfill under Temperature-Chemical Coupling Conditions |
| title_full_unstemmed | Experimental Study on Mechanical Properties of Cemented Paste Backfill under Temperature-Chemical Coupling Conditions |
| title_short | Experimental Study on Mechanical Properties of Cemented Paste Backfill under Temperature-Chemical Coupling Conditions |
| title_sort | experimental study on mechanical properties of cemented paste backfill under temperature chemical coupling conditions |
| url | http://dx.doi.org/10.1155/2019/9754790 |
| work_keys_str_mv | AT yinliu experimentalstudyonmechanicalpropertiesofcementedpastebackfillundertemperaturechemicalcouplingconditions AT haoli experimentalstudyonmechanicalpropertiesofcementedpastebackfillundertemperaturechemicalcouplingconditions AT haifengwu experimentalstudyonmechanicalpropertiesofcementedpastebackfillundertemperaturechemicalcouplingconditions |