An Experimental Study on the Microstructures of Cemented Paste Backfill during Its Developing Process
The aim of this study was to examine the microstructure of cemented paste backfill (CPB) during its development and relate the characteristics of the microstructure to the physical and mechanical properties of CPB. The geometry and morphology of the microstructures of CPB were observed by the scanni...
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2018/9783046 |
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| author | Bo Zhang Jie Xin Lang Liu Lijie Guo Ki-Il Song |
| author_facet | Bo Zhang Jie Xin Lang Liu Lijie Guo Ki-Il Song |
| author_sort | Bo Zhang |
| collection | DOAJ |
| description | The aim of this study was to examine the microstructure of cemented paste backfill (CPB) during its development and relate the characteristics of the microstructure to the physical and mechanical properties of CPB. The geometry and morphology of the microstructures of CPB were observed by the scanning electron microscopy (SEM). The characteristics including pore size, pore shape, and orientation of the microstructures of CPB at different curing times were analyzed based on the SEM images. The porosity, fractal dimension, and probability entropy were characterized using the Particles and Pore Recognition and Analysis System (PPRAS). It was found that the pore size, pore shape, and orientation of the microstructure of CPB significantly change as the curing time increases, resulting in the increase of UCS. Meanwhile, the arrangement of the pores affects the mechanical properties of CPB. At the early age of CPB development, the probability entropy is above 0.96, indicating a chaotic pore distribution and no obvious orientation. At the late age of CPB development, the probability entropy becomes smaller and the order and orientation of the pore distribution are enhanced, leading to an increase in USC. The UCS of CPB is also greatly affected by the characteristics of the pore morphology. During the development of CPB, the pore shape becomes smoother. The UCS of CPB approximately linearly improves with an increase in the average roundness of pores. |
| format | Article |
| id | doaj-art-fa8b720eb5154988adc0ee2ee980ca05 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-fa8b720eb5154988adc0ee2ee980ca052025-02-03T06:13:14ZengWileyAdvances in Civil Engineering1687-80861687-80942018-01-01201810.1155/2018/97830469783046An Experimental Study on the Microstructures of Cemented Paste Backfill during Its Developing ProcessBo Zhang0Jie Xin1Lang Liu2Lijie Guo3Ki-Il Song4Energy School, Xi’an University of Science and Technology, Xi’an 710054, ChinaEnergy School, Xi’an University of Science and Technology, Xi’an 710054, ChinaEnergy School, Xi’an University of Science and Technology, Xi’an 710054, ChinaBeijing General Research Institute of Mining & Metallurgy, Beijing 100160, ChinaDepartment of Civil Engineering, Inha University, Incheon 402-751, Republic of KoreaThe aim of this study was to examine the microstructure of cemented paste backfill (CPB) during its development and relate the characteristics of the microstructure to the physical and mechanical properties of CPB. The geometry and morphology of the microstructures of CPB were observed by the scanning electron microscopy (SEM). The characteristics including pore size, pore shape, and orientation of the microstructures of CPB at different curing times were analyzed based on the SEM images. The porosity, fractal dimension, and probability entropy were characterized using the Particles and Pore Recognition and Analysis System (PPRAS). It was found that the pore size, pore shape, and orientation of the microstructure of CPB significantly change as the curing time increases, resulting in the increase of UCS. Meanwhile, the arrangement of the pores affects the mechanical properties of CPB. At the early age of CPB development, the probability entropy is above 0.96, indicating a chaotic pore distribution and no obvious orientation. At the late age of CPB development, the probability entropy becomes smaller and the order and orientation of the pore distribution are enhanced, leading to an increase in USC. The UCS of CPB is also greatly affected by the characteristics of the pore morphology. During the development of CPB, the pore shape becomes smoother. The UCS of CPB approximately linearly improves with an increase in the average roundness of pores.http://dx.doi.org/10.1155/2018/9783046 |
| spellingShingle | Bo Zhang Jie Xin Lang Liu Lijie Guo Ki-Il Song An Experimental Study on the Microstructures of Cemented Paste Backfill during Its Developing Process Advances in Civil Engineering |
| title | An Experimental Study on the Microstructures of Cemented Paste Backfill during Its Developing Process |
| title_full | An Experimental Study on the Microstructures of Cemented Paste Backfill during Its Developing Process |
| title_fullStr | An Experimental Study on the Microstructures of Cemented Paste Backfill during Its Developing Process |
| title_full_unstemmed | An Experimental Study on the Microstructures of Cemented Paste Backfill during Its Developing Process |
| title_short | An Experimental Study on the Microstructures of Cemented Paste Backfill during Its Developing Process |
| title_sort | experimental study on the microstructures of cemented paste backfill during its developing process |
| url | http://dx.doi.org/10.1155/2018/9783046 |
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