Concrete double-K fracture toughness and fracture energy influenced by porosity and pore size
Abstract The diameter and quantity of internal pores in concrete significantly influence its mechanical properties. While existing studies predominantly focus on the influence of pore quantity, this study utilizes pre-fabricated pores made from polystyrene particles (EPS) to investigate the effects...
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Nature Portfolio
2025-07-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-05841-0 |
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| author | Guohui Zhang Dejin Gu Yanshuang Gu Mingyang Zhou Bo Zhao Mingming Wang |
| author_facet | Guohui Zhang Dejin Gu Yanshuang Gu Mingyang Zhou Bo Zhao Mingming Wang |
| author_sort | Guohui Zhang |
| collection | DOAJ |
| description | Abstract The diameter and quantity of internal pores in concrete significantly influence its mechanical properties. While existing studies predominantly focus on the influence of pore quantity, this study utilizes pre-fabricated pores made from polystyrene particles (EPS) to investigate the effects of different pore diameter and porosity on the fracture mechanical properties of concrete. The results indicate that the incorporation of EPS degrades the fracture mechanical properties of concrete. The initiation load, peak load, initiation fracture toughness, instability fracture toughness, and fracture energy of concrete all decrease with increasing porosity. At constant porosity, the initiation load and initiation fracture toughness of concrete with a hole diameter of 0.3 to 0.6 mm decreased the most, with maximum reductions of 48.98% and 49.30%, respectively. The peak load, instability fracture toughness and fracture energy of concrete with a hole diameter of 3 to 5 mm decreased the most, with maximum reductions of 26.88%,38.46%,24.02%, respectively. In comparison to porosity, pore size has a more significant impact on the initiation fracture toughness of concrete. The influence of porosity on the instability fracture toughness and fracture energy of concrete is greater than that of pore size. |
| format | Article |
| id | doaj-art-634d67fd9a7447639dac2479ddc8ded7 |
| institution | DOAJ |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-634d67fd9a7447639dac2479ddc8ded72025-08-20T03:03:25ZengNature PortfolioScientific Reports2045-23222025-07-0115111510.1038/s41598-025-05841-0Concrete double-K fracture toughness and fracture energy influenced by porosity and pore sizeGuohui Zhang0Dejin Gu1Yanshuang Gu2Mingyang Zhou3Bo Zhao4Mingming Wang5Faculty of Electric Power Engineering, Kunming University of Science and TechnologyFaculty of Electric Power Engineering, Kunming University of Science and TechnologyYunnan Engineering Vocational CollegeFaculty of Electric Power Engineering, Kunming University of Science and TechnologyFaculty of Electric Power Engineering, Kunming University of Science and TechnologyFaculty of Electric Power Engineering, Kunming University of Science and TechnologyAbstract The diameter and quantity of internal pores in concrete significantly influence its mechanical properties. While existing studies predominantly focus on the influence of pore quantity, this study utilizes pre-fabricated pores made from polystyrene particles (EPS) to investigate the effects of different pore diameter and porosity on the fracture mechanical properties of concrete. The results indicate that the incorporation of EPS degrades the fracture mechanical properties of concrete. The initiation load, peak load, initiation fracture toughness, instability fracture toughness, and fracture energy of concrete all decrease with increasing porosity. At constant porosity, the initiation load and initiation fracture toughness of concrete with a hole diameter of 0.3 to 0.6 mm decreased the most, with maximum reductions of 48.98% and 49.30%, respectively. The peak load, instability fracture toughness and fracture energy of concrete with a hole diameter of 3 to 5 mm decreased the most, with maximum reductions of 26.88%,38.46%,24.02%, respectively. In comparison to porosity, pore size has a more significant impact on the initiation fracture toughness of concrete. The influence of porosity on the instability fracture toughness and fracture energy of concrete is greater than that of pore size.https://doi.org/10.1038/s41598-025-05841-0ConcreteEPS particlePorosityPore sizeFracture toughnessFracture energy |
| spellingShingle | Guohui Zhang Dejin Gu Yanshuang Gu Mingyang Zhou Bo Zhao Mingming Wang Concrete double-K fracture toughness and fracture energy influenced by porosity and pore size Scientific Reports Concrete EPS particle Porosity Pore size Fracture toughness Fracture energy |
| title | Concrete double-K fracture toughness and fracture energy influenced by porosity and pore size |
| title_full | Concrete double-K fracture toughness and fracture energy influenced by porosity and pore size |
| title_fullStr | Concrete double-K fracture toughness and fracture energy influenced by porosity and pore size |
| title_full_unstemmed | Concrete double-K fracture toughness and fracture energy influenced by porosity and pore size |
| title_short | Concrete double-K fracture toughness and fracture energy influenced by porosity and pore size |
| title_sort | concrete double k fracture toughness and fracture energy influenced by porosity and pore size |
| topic | Concrete EPS particle Porosity Pore size Fracture toughness Fracture energy |
| url | https://doi.org/10.1038/s41598-025-05841-0 |
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