An Investigation of Thermal Effects on Micro-Properties of Sudbury Norite by CT Scanning and Image Processing Method
Rock is constantly subjected to stress and thermal conditions. Thermal-induced micro-cracks will be generated as a result of different thermal expansion gradations between different minerals. This characteristic was investigated in this paper by studying the micro-properties of Sudbury norite via CT...
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MDPI AG
2022-08-01
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| Series: | Mining |
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| Online Access: | https://www.mdpi.com/2673-6489/2/3/27 |
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| author | Sheng-Lin Wang Brad Simser Shunde Yin Ju Huyan |
| author_facet | Sheng-Lin Wang Brad Simser Shunde Yin Ju Huyan |
| author_sort | Sheng-Lin Wang |
| collection | DOAJ |
| description | Rock is constantly subjected to stress and thermal conditions. Thermal-induced micro-cracks will be generated as a result of different thermal expansion gradations between different minerals. This characteristic was investigated in this paper by studying the micro-properties of Sudbury norite via CT scanning and the image processing method. A novel filtering method, maximum–minimum shadow filtering (MMSF), was developed in this study to highlight the thermal-induced micro-cracks in Sudbury Igneous Complex (SIC) norite after different temperature treatments. Based on quantitative analysis, the areal percentages of biotite, felspar, quartz, and small amounts of metal minerals were determined. It was also found that small-scale micro-cracks were first observed in the middle of biotite grains at a temperature of 400 °C. The cracks further propagated and extended with the temperature increase. In addition, the orientations of cracks either remained at the same distribution or became more evenly distributed with the rising temperature. A linear relationship was found between the average porosity of SIC norite and the temperature. Moreover, the anisotropic properties between vertical and horizontal directions of norite were also noticeable. Overall, the paper presented a quantitative study on the effects of thermal treatment and the anisotropic properties of SIC norite. Methodology and findings from this paper will be a significant reference for future studies regarding the thermal impacts on norite and similar rocks. |
| first_indexed | 2024-03-09T23:04:12Z |
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| id | doaj.art-963215d0ccd94ce5a5b497a2a6700e61 |
| institution | Directory Open Access Journal |
| issn | 2673-6489 |
| language | English |
| last_indexed | 2024-03-09T23:04:12Z |
| publishDate | 2022-08-01 |
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| spelling | doaj.art-963215d0ccd94ce5a5b497a2a6700e612023-11-23T17:56:53ZengMDPI AGMining2673-64892022-08-012351152710.3390/mining2030027An Investigation of Thermal Effects on Micro-Properties of Sudbury Norite by CT Scanning and Image Processing MethodSheng-Lin Wang0Brad Simser1Shunde Yin2Ju Huyan3Department of Civil and Environmental Engineering, Faculty of Engineering, University of Waterloo, Waterloo, ON N2L 3G1, CanadaSudbury Integrated Nickel Operations, Glencore, Sudbury, ON P0M 1S0, CanadaDepartment of Civil and Environmental Engineering, Faculty of Engineering, University of Waterloo, Waterloo, ON N2L 3G1, CanadaSchool of Transportation, Southeast University, Nanjing 210000, ChinaRock is constantly subjected to stress and thermal conditions. Thermal-induced micro-cracks will be generated as a result of different thermal expansion gradations between different minerals. This characteristic was investigated in this paper by studying the micro-properties of Sudbury norite via CT scanning and the image processing method. A novel filtering method, maximum–minimum shadow filtering (MMSF), was developed in this study to highlight the thermal-induced micro-cracks in Sudbury Igneous Complex (SIC) norite after different temperature treatments. Based on quantitative analysis, the areal percentages of biotite, felspar, quartz, and small amounts of metal minerals were determined. It was also found that small-scale micro-cracks were first observed in the middle of biotite grains at a temperature of 400 °C. The cracks further propagated and extended with the temperature increase. In addition, the orientations of cracks either remained at the same distribution or became more evenly distributed with the rising temperature. A linear relationship was found between the average porosity of SIC norite and the temperature. Moreover, the anisotropic properties between vertical and horizontal directions of norite were also noticeable. Overall, the paper presented a quantitative study on the effects of thermal treatment and the anisotropic properties of SIC norite. Methodology and findings from this paper will be a significant reference for future studies regarding the thermal impacts on norite and similar rocks.https://www.mdpi.com/2673-6489/2/3/27Sudbury noritethermal effectimage processingquantitative analysismicro-crack |
| spellingShingle | Sheng-Lin Wang Brad Simser Shunde Yin Ju Huyan An Investigation of Thermal Effects on Micro-Properties of Sudbury Norite by CT Scanning and Image Processing Method Mining Sudbury norite thermal effect image processing quantitative analysis micro-crack |
| title | An Investigation of Thermal Effects on Micro-Properties of Sudbury Norite by CT Scanning and Image Processing Method |
| title_full | An Investigation of Thermal Effects on Micro-Properties of Sudbury Norite by CT Scanning and Image Processing Method |
| title_fullStr | An Investigation of Thermal Effects on Micro-Properties of Sudbury Norite by CT Scanning and Image Processing Method |
| title_full_unstemmed | An Investigation of Thermal Effects on Micro-Properties of Sudbury Norite by CT Scanning and Image Processing Method |
| title_short | An Investigation of Thermal Effects on Micro-Properties of Sudbury Norite by CT Scanning and Image Processing Method |
| title_sort | investigation of thermal effects on micro properties of sudbury norite by ct scanning and image processing method |
| topic | Sudbury norite thermal effect image processing quantitative analysis micro-crack |
| url | https://www.mdpi.com/2673-6489/2/3/27 |
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