Fracture behaviour of concrete with different replacement rates of iron tailings sand based on double-K criterion
The article conducts a study on the iron tailings sand concrete's fracture behaviour based on the double-K criterion. Five sets of standard three-point bending beam specimens of concrete with 0%, 25%, 50%, 75% and 100% iron tailings sand replacement river sand respectively were fracture tested...
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| Format: | Article |
| Language: | English |
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Gruppo Italiano Frattura
2023-03-01
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| Series: | Fracture and Structural Integrity |
| Subjects: | |
| Online Access: | https://fracturae.com/index.php/fis/article/view/4033 |
| _version_ | 1826952845697482752 |
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| author | Yao Zhang Wei-Hua Ma Hong-Zhen Kang Qiang Li |
| author_facet | Yao Zhang Wei-Hua Ma Hong-Zhen Kang Qiang Li |
| author_sort | Yao Zhang |
| collection | DOAJ |
| description |
The article conducts a study on the iron tailings sand concrete's fracture behaviour based on the double-K criterion. Five sets of standard three-point bending beam specimens of concrete with 0%, 25%, 50%, 75% and 100% iron tailings sand replacement river sand respectively were fracture tested, and the P-CMOD and P- ε curves of each set of specimens were measured to determine the pertinent fracture parameters. The specimens were also microscopically tested using scanning electron microscopy and mercury intrusion porosimetry. The results demonstrate that the fracture processes and damage patterns of iron tailings sand concrete and river sand concrete are comparable; the addition of iron tailings sand improves initial cracking load and initial cracking toughness more significantly than unstable cracking load and unstable cracking toughness; the ductility of iron tailings sand concrete is marginally inferior; and the results of microscopic tests demonstrate that the addition of iron tailings sand can improve the morphology and pore structure of the interface transition zone. Therefore, from the assessment of fracture mechanics, iron tailings sand can totally replace river sand in equivalent quantities for concrete preparation, which will provide great potential for the secondary use of iron tailings sand.
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| first_indexed | 2024-04-09T22:22:19Z |
| format | Article |
| id | doaj.art-faf52de04f3f4ed39ebd4918eb5d7253 |
| institution | Directory Open Access Journal |
| issn | 1971-8993 |
| language | English |
| last_indexed | 2025-02-17T23:13:10Z |
| publishDate | 2023-03-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj.art-faf52de04f3f4ed39ebd4918eb5d72532024-12-02T06:59:40ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932023-03-011764Fracture behaviour of concrete with different replacement rates of iron tailings sand based on double-K criterion Yao Zhang0Wei-Hua Ma1Hong-Zhen Kang2Qiang Li3School of Civil Engineering, Tangshan University, Tangshan 063000, China; Hebei Key Laboratory of Building Engineering and Tailings Utilization, Hebei Tangshan 063000, China.School of Civil Engineering, Tangshan University, Tangshan 063000, China; Hebei Key Laboratory of Building Engineering and Tailings Utilization, Hebei Tangshan 063000, China.School of Civil Engineering, Tangshan University, Tangshan 063000, China; Hebei Key Laboratory of Building Engineering and Tailings Utilization, Hebei Tangshan 063000, China.School of Civil Engineering, Tangshan University, Tangshan 063000, China; Hebei Key Laboratory of Building Engineering and Tailings Utilization, Hebei Tangshan 063000, China. The article conducts a study on the iron tailings sand concrete's fracture behaviour based on the double-K criterion. Five sets of standard three-point bending beam specimens of concrete with 0%, 25%, 50%, 75% and 100% iron tailings sand replacement river sand respectively were fracture tested, and the P-CMOD and P- ε curves of each set of specimens were measured to determine the pertinent fracture parameters. The specimens were also microscopically tested using scanning electron microscopy and mercury intrusion porosimetry. The results demonstrate that the fracture processes and damage patterns of iron tailings sand concrete and river sand concrete are comparable; the addition of iron tailings sand improves initial cracking load and initial cracking toughness more significantly than unstable cracking load and unstable cracking toughness; the ductility of iron tailings sand concrete is marginally inferior; and the results of microscopic tests demonstrate that the addition of iron tailings sand can improve the morphology and pore structure of the interface transition zone. Therefore, from the assessment of fracture mechanics, iron tailings sand can totally replace river sand in equivalent quantities for concrete preparation, which will provide great potential for the secondary use of iron tailings sand. https://fracturae.com/index.php/fis/article/view/4033Iron tailings sand concreteDouble-K criterionReplacement rateThree-point bending beamMicroscopic test |
| spellingShingle | Yao Zhang Wei-Hua Ma Hong-Zhen Kang Qiang Li Fracture behaviour of concrete with different replacement rates of iron tailings sand based on double-K criterion Fracture and Structural Integrity Iron tailings sand concrete Double-K criterion Replacement rate Three-point bending beam Microscopic test |
| title | Fracture behaviour of concrete with different replacement rates of iron tailings sand based on double-K criterion |
| title_full | Fracture behaviour of concrete with different replacement rates of iron tailings sand based on double-K criterion |
| title_fullStr | Fracture behaviour of concrete with different replacement rates of iron tailings sand based on double-K criterion |
| title_full_unstemmed | Fracture behaviour of concrete with different replacement rates of iron tailings sand based on double-K criterion |
| title_short | Fracture behaviour of concrete with different replacement rates of iron tailings sand based on double-K criterion |
| title_sort | fracture behaviour of concrete with different replacement rates of iron tailings sand based on double k criterion |
| topic | Iron tailings sand concrete Double-K criterion Replacement rate Three-point bending beam Microscopic test |
| url | https://fracturae.com/index.php/fis/article/view/4033 |
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