Energy evolution properties and strength failure criterion of coal-fired slag concrete based on energy dissipation
Coal-fired slag concrete is gradually used in underground projects such as coal mines. Due to the differences between concrete composites and rocks, the failure of coal-fired slag concrete cannot be predicted from the essence through the stress–strain curve. However, studying the deformation and fai...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-12-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509522005010 |
| _version_ | 1811313789041115136 |
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| author | Weizhen Liu Shiwei Niu |
| author_facet | Weizhen Liu Shiwei Niu |
| author_sort | Weizhen Liu |
| collection | DOAJ |
| description | Coal-fired slag concrete is gradually used in underground projects such as coal mines. Due to the differences between concrete composites and rocks, the failure of coal-fired slag concrete cannot be predicted from the essence through the stress–strain curve. However, studying the deformation and failure law of concrete from the perspective of energy can be closer to the essence of concrete deformation and failure. Therefore, in this paper, with the help of RLJW-2000 testing machine, the uniaxial compression test of C15 strength grade coal-fired slag concrete is carried out, the energy evolution law in the process of deformation and failure of coal-fired slag concrete is analyzed, and the failure criterion based on energy consumption ratio is established. The results show that with the increase of slag-cement ratio, the total energy and elastic strain energy at the peak point gradually decrease. The evolution of peak energy density satisfies the exponential function relation with e as the base. The process that the elastic energy consumption ratio changes from the stable state tending to 0 to the beginning of growth, or the process that the elastic energy consumption ratio changes from negative value to 0, and then gradually increases to positive value can be used as the energy criterion for the strength failure of coal-fired slag concrete. The research results can essentially analyze the instability and failure of coal-fired slag concrete, which is of great significance to ensure the safety of coal-fired slag concrete in engineering application. |
| first_indexed | 2024-04-13T11:01:08Z |
| format | Article |
| id | doaj.art-702588644606466998461c84b6a3e3a4 |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-04-13T11:01:08Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-702588644606466998461c84b6a3e3a42022-12-22T02:49:24ZengElsevierCase Studies in Construction Materials2214-50952022-12-0117e01369Energy evolution properties and strength failure criterion of coal-fired slag concrete based on energy dissipationWeizhen Liu0Shiwei Niu1College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaCorresponding author.; College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaCoal-fired slag concrete is gradually used in underground projects such as coal mines. Due to the differences between concrete composites and rocks, the failure of coal-fired slag concrete cannot be predicted from the essence through the stress–strain curve. However, studying the deformation and failure law of concrete from the perspective of energy can be closer to the essence of concrete deformation and failure. Therefore, in this paper, with the help of RLJW-2000 testing machine, the uniaxial compression test of C15 strength grade coal-fired slag concrete is carried out, the energy evolution law in the process of deformation and failure of coal-fired slag concrete is analyzed, and the failure criterion based on energy consumption ratio is established. The results show that with the increase of slag-cement ratio, the total energy and elastic strain energy at the peak point gradually decrease. The evolution of peak energy density satisfies the exponential function relation with e as the base. The process that the elastic energy consumption ratio changes from the stable state tending to 0 to the beginning of growth, or the process that the elastic energy consumption ratio changes from negative value to 0, and then gradually increases to positive value can be used as the energy criterion for the strength failure of coal-fired slag concrete. The research results can essentially analyze the instability and failure of coal-fired slag concrete, which is of great significance to ensure the safety of coal-fired slag concrete in engineering application.http://www.sciencedirect.com/science/article/pii/S2214509522005010Coal-fired slag concreteEnergy evolutionEnergy distributionEnergy storageFailure criterion |
| spellingShingle | Weizhen Liu Shiwei Niu Energy evolution properties and strength failure criterion of coal-fired slag concrete based on energy dissipation Case Studies in Construction Materials Coal-fired slag concrete Energy evolution Energy distribution Energy storage Failure criterion |
| title | Energy evolution properties and strength failure criterion of coal-fired slag concrete based on energy dissipation |
| title_full | Energy evolution properties and strength failure criterion of coal-fired slag concrete based on energy dissipation |
| title_fullStr | Energy evolution properties and strength failure criterion of coal-fired slag concrete based on energy dissipation |
| title_full_unstemmed | Energy evolution properties and strength failure criterion of coal-fired slag concrete based on energy dissipation |
| title_short | Energy evolution properties and strength failure criterion of coal-fired slag concrete based on energy dissipation |
| title_sort | energy evolution properties and strength failure criterion of coal fired slag concrete based on energy dissipation |
| topic | Coal-fired slag concrete Energy evolution Energy distribution Energy storage Failure criterion |
| url | http://www.sciencedirect.com/science/article/pii/S2214509522005010 |
| work_keys_str_mv | AT weizhenliu energyevolutionpropertiesandstrengthfailurecriterionofcoalfiredslagconcretebasedonenergydissipation AT shiweiniu energyevolutionpropertiesandstrengthfailurecriterionofcoalfiredslagconcretebasedonenergydissipation |