Temperature Field Characterization of Iron Tailings Based on Microwave Maintenance Technology
Microwave maintenance technology, as a new development trend, can realize the environmentally noninvasive and rapid repair of asphalt pavement and gradually replace traditional maintenance methods. Iron tailings were used as a self-healing material in this study to investigate the temperature respon...
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MDPI AG
2024-01-01
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| Online Access: | https://www.mdpi.com/1996-1944/17/2/372 |
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| author | Jun Xue Shengjie Liu Meng Xu Meng Ling Jinbao Sun Hui Li Xianzhang Kang |
| author_facet | Jun Xue Shengjie Liu Meng Xu Meng Ling Jinbao Sun Hui Li Xianzhang Kang |
| author_sort | Jun Xue |
| collection | DOAJ |
| description | Microwave maintenance technology, as a new development trend, can realize the environmentally noninvasive and rapid repair of asphalt pavement and gradually replace traditional maintenance methods. Iron tailings were used as a self-healing material in this study to investigate the temperature response matching of microwave maintenance technology. Firstly, the physical properties and the mechanism of iron tailings were elaborated through macroscopic physical index testing and microscopic X-ray diffraction (XRD) analysis. Secondly, the applicability of aggregates to microwave heating was demonstrated by analyzing the temperature rise characteristics of the granules using infrared imaging. Then, the temperature field variation rules of the iron tailing asphalt mixture were summarized by microwave heating Marshall specimens. Finally, the road performance was assessed by conducting high-temperature dynamic stability, low-temperature tensile, water immersion Marshall, and freeze-thaw splitting tests. The experimental results showed that the iron tailings can be used as an aggregate for high-grade asphalt pavement and as the preferred aggregate for microwave maintenance technology. The iron tailings temperature field was radial from the inside out to provide different temperature response states for different pavement diseases, so the asphalt was dissolved and precipitated in a short time. The particle size of iron tailings was inversely proportional to the wave-absorbing heating rate, and the heating efficiency of the small particle size (0–4.75 mm) was the highest. The specimens doped with 4.75–13.2 mm iron tailings showed the best heating performance and road performance, with the average surface temperature of the specimens reaching 126.0 °C within 2 min. In summary, according to different disease types and construction needs, iron tailings can be used as an aggregate for asphalt pavement, providing an appropriate temperature field and improving the efficiency of the microwave maintenance of asphalt pavements. |
| first_indexed | 2024-03-08T10:43:35Z |
| format | Article |
| id | doaj.art-a90aec74796e4c6dad253c238dc4a2cc |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-08T10:43:35Z |
| publishDate | 2024-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-a90aec74796e4c6dad253c238dc4a2cc2024-01-26T17:27:00ZengMDPI AGMaterials1996-19442024-01-0117237210.3390/ma17020372Temperature Field Characterization of Iron Tailings Based on Microwave Maintenance TechnologyJun Xue0Shengjie Liu1Meng Xu2Meng Ling3Jinbao Sun4Hui Li5Xianzhang Kang6Shandong Luqiao Group Co., Ltd., Jinan 250021, ChinaSchool of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, ChinaSchool of Transportation and Civil Engineering, Shandong Jiaotong University, Jinan 250357, ChinaSchool of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, ChinaShandong Luqiao Group Co., Ltd., Jinan 250021, ChinaShandong Luqiao Group Co., Ltd., Jinan 250021, ChinaSchool of Transportation and Civil Engineering, Shandong Jiaotong University, Jinan 250357, ChinaMicrowave maintenance technology, as a new development trend, can realize the environmentally noninvasive and rapid repair of asphalt pavement and gradually replace traditional maintenance methods. Iron tailings were used as a self-healing material in this study to investigate the temperature response matching of microwave maintenance technology. Firstly, the physical properties and the mechanism of iron tailings were elaborated through macroscopic physical index testing and microscopic X-ray diffraction (XRD) analysis. Secondly, the applicability of aggregates to microwave heating was demonstrated by analyzing the temperature rise characteristics of the granules using infrared imaging. Then, the temperature field variation rules of the iron tailing asphalt mixture were summarized by microwave heating Marshall specimens. Finally, the road performance was assessed by conducting high-temperature dynamic stability, low-temperature tensile, water immersion Marshall, and freeze-thaw splitting tests. The experimental results showed that the iron tailings can be used as an aggregate for high-grade asphalt pavement and as the preferred aggregate for microwave maintenance technology. The iron tailings temperature field was radial from the inside out to provide different temperature response states for different pavement diseases, so the asphalt was dissolved and precipitated in a short time. The particle size of iron tailings was inversely proportional to the wave-absorbing heating rate, and the heating efficiency of the small particle size (0–4.75 mm) was the highest. The specimens doped with 4.75–13.2 mm iron tailings showed the best heating performance and road performance, with the average surface temperature of the specimens reaching 126.0 °C within 2 min. In summary, according to different disease types and construction needs, iron tailings can be used as an aggregate for asphalt pavement, providing an appropriate temperature field and improving the efficiency of the microwave maintenance of asphalt pavements.https://www.mdpi.com/1996-1944/17/2/372road engineeringasphalt mixturetemperature fieldiron tailingmicrowave heating |
| spellingShingle | Jun Xue Shengjie Liu Meng Xu Meng Ling Jinbao Sun Hui Li Xianzhang Kang Temperature Field Characterization of Iron Tailings Based on Microwave Maintenance Technology Materials road engineering asphalt mixture temperature field iron tailing microwave heating |
| title | Temperature Field Characterization of Iron Tailings Based on Microwave Maintenance Technology |
| title_full | Temperature Field Characterization of Iron Tailings Based on Microwave Maintenance Technology |
| title_fullStr | Temperature Field Characterization of Iron Tailings Based on Microwave Maintenance Technology |
| title_full_unstemmed | Temperature Field Characterization of Iron Tailings Based on Microwave Maintenance Technology |
| title_short | Temperature Field Characterization of Iron Tailings Based on Microwave Maintenance Technology |
| title_sort | temperature field characterization of iron tailings based on microwave maintenance technology |
| topic | road engineering asphalt mixture temperature field iron tailing microwave heating |
| url | https://www.mdpi.com/1996-1944/17/2/372 |
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