Mechanical properties and damage evolution behavior of coal–fired slag concrete under uniaxial compression based on acoustic emission monitoring technology
Slag waste can be effectively used to produce coal–fired slag concrete (CSC), which has economic and environmental benefits. However, CSC used in engineering construction will eventually be subjected to damage. The purpose of this study is to investigate the mechanical characteristics and damage evo...
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| Format: | Article |
| Language: | English |
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Elsevier
2020-09-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785420314721 |
| _version_ | 1818257494680535040 |
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| author | Weizhen Liu Zhongping Guo Shiwei Niu Jifeng Hou Fuyu Zhang Chengqian He |
| author_facet | Weizhen Liu Zhongping Guo Shiwei Niu Jifeng Hou Fuyu Zhang Chengqian He |
| author_sort | Weizhen Liu |
| collection | DOAJ |
| description | Slag waste can be effectively used to produce coal–fired slag concrete (CSC), which has economic and environmental benefits. However, CSC used in engineering construction will eventually be subjected to damage. The purpose of this study is to investigate the mechanical characteristics and damage evolution behaviour of CSC specimens under a uniaxial compressive load using acoustic emission (AE) monitoring technology. Through uniaxial compression testing and AE monitoring, the stress–strain curve and AE characteristics of CSC specimens are obtained. Subsequently, a damage evolution model of the CSC specimens under a uniaxial compression load is constructed, and the damage evolution characteristics of the concrete are analysed. The results indicate that an increase in the ratio of the coal–fired slag mass to the cement mass results in a gradual reduction in the compressive strength of the CSC. Moreover, the maximum value of the cumulative energy count and cumulative ringing count of the AEs gradually increases while the damage degree gradually decreases. The damage evolution process for CSC can be divided into three stages: the initial damage formation stage, accelerated damage growth stage, and damage failure stage. The damage model, based on the AE cumulative ringing count, reasonably reflects the damage evolution process of the CSC specimens. The results of this study provide a reference for theoretical research and the engineering application of CSC. |
| first_indexed | 2024-12-12T17:44:33Z |
| format | Article |
| id | doaj.art-9da3d829541848ff9b0845859071b006 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-12-12T17:44:33Z |
| publishDate | 2020-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-9da3d829541848ff9b0845859071b0062022-12-22T00:16:59ZengElsevierJournal of Materials Research and Technology2238-78542020-09-019595379549Mechanical properties and damage evolution behavior of coal–fired slag concrete under uniaxial compression based on acoustic emission monitoring technologyWeizhen Liu0Zhongping Guo1Shiwei Niu2Jifeng Hou3Fuyu Zhang4Chengqian He5College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China; Corresponding author.College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China; National Demonstration Center for Experimental Mining Engineering Education, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China; College of Coal Engineering, Shanxi Datong University, Datong 037009, ChinaCollege of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaSlag waste can be effectively used to produce coal–fired slag concrete (CSC), which has economic and environmental benefits. However, CSC used in engineering construction will eventually be subjected to damage. The purpose of this study is to investigate the mechanical characteristics and damage evolution behaviour of CSC specimens under a uniaxial compressive load using acoustic emission (AE) monitoring technology. Through uniaxial compression testing and AE monitoring, the stress–strain curve and AE characteristics of CSC specimens are obtained. Subsequently, a damage evolution model of the CSC specimens under a uniaxial compression load is constructed, and the damage evolution characteristics of the concrete are analysed. The results indicate that an increase in the ratio of the coal–fired slag mass to the cement mass results in a gradual reduction in the compressive strength of the CSC. Moreover, the maximum value of the cumulative energy count and cumulative ringing count of the AEs gradually increases while the damage degree gradually decreases. The damage evolution process for CSC can be divided into three stages: the initial damage formation stage, accelerated damage growth stage, and damage failure stage. The damage model, based on the AE cumulative ringing count, reasonably reflects the damage evolution process of the CSC specimens. The results of this study provide a reference for theoretical research and the engineering application of CSC.http://www.sciencedirect.com/science/article/pii/S2238785420314721Acoustic emissionsCoal–Fired slag concreteUniaxial compressionCumulative ringing countDamage evolution |
| spellingShingle | Weizhen Liu Zhongping Guo Shiwei Niu Jifeng Hou Fuyu Zhang Chengqian He Mechanical properties and damage evolution behavior of coal–fired slag concrete under uniaxial compression based on acoustic emission monitoring technology Journal of Materials Research and Technology Acoustic emissions Coal–Fired slag concrete Uniaxial compression Cumulative ringing count Damage evolution |
| title | Mechanical properties and damage evolution behavior of coal–fired slag concrete under uniaxial compression based on acoustic emission monitoring technology |
| title_full | Mechanical properties and damage evolution behavior of coal–fired slag concrete under uniaxial compression based on acoustic emission monitoring technology |
| title_fullStr | Mechanical properties and damage evolution behavior of coal–fired slag concrete under uniaxial compression based on acoustic emission monitoring technology |
| title_full_unstemmed | Mechanical properties and damage evolution behavior of coal–fired slag concrete under uniaxial compression based on acoustic emission monitoring technology |
| title_short | Mechanical properties and damage evolution behavior of coal–fired slag concrete under uniaxial compression based on acoustic emission monitoring technology |
| title_sort | mechanical properties and damage evolution behavior of coal fired slag concrete under uniaxial compression based on acoustic emission monitoring technology |
| topic | Acoustic emissions Coal–Fired slag concrete Uniaxial compression Cumulative ringing count Damage evolution |
| url | http://www.sciencedirect.com/science/article/pii/S2238785420314721 |
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