Study on fracture mechanical properties and mechanism of engineered cementitious composites (ECC) after high temperature
The low melting point characteristics of organic fibers restrict the utilization of ECC in engineering applications. In this paper, the fracture mechanical properties of ECC were studied considering temperature and polyethylene fiber content, and the crack propagation rule and potential mechanism of...
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| Language: | English |
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Elsevier
2024-12-01
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| Series: | Case Studies in Construction Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509524012014 |
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| author | Liangqin Wu Zhiyong Zhu Tianqian Wu Renfeng Li Zhenpeng Yu Qiang Feng Dongyi Xie |
| author_facet | Liangqin Wu Zhiyong Zhu Tianqian Wu Renfeng Li Zhenpeng Yu Qiang Feng Dongyi Xie |
| author_sort | Liangqin Wu |
| collection | DOAJ |
| description | The low melting point characteristics of organic fibers restrict the utilization of ECC in engineering applications. In this paper, the fracture mechanical properties of ECC were studied considering temperature and polyethylene fiber content, and the crack propagation rule and potential mechanism of ECC were clarified by using digital image correlation (DIC) technology and microscopic testing technology. The following conclusions are mainly obtained through the study. When the fiber content is 0 %, with the increase of temperature, the unstable fracture load, initial fracture toughness and unstable fracture toughness of the specimen are all reduced, while the fracture energy increases first and then decreases. When the fiber content is 0.5 %, 1 % and 1.5 %, the fracture parameters (unstable fracture load, fracture energy, initial fracture toughness and unstable fracture toughness) of the specimens decrease with the increase of temperature, and the decrease of the fracture parameters of the specimens is more obvious especially at 400℃ and later. The higher the PE fiber content, the more the fracture parameter is reduced by the temperature effect. The fracture parameters of the specimens increased significantly with the increase of PE fiber content at both room temperature/20℃ and 200℃, while the fracture parameters of the specimens decreased with the increase of fiber content when the temperature was not lower than 400°C, but the decrease was not significant. The results of the DIC technique showed that, with the increase of temperature, the crack initiation stage is advanced, the rapid crack development period is delayed. The development trend of crack length of the specimen is slowed down. At the same time, the mechanism of high temperature on the deterioration of ECC fracture mechanical properties under different PE fiber content was revealed. The results of this paper provide a theoretical basis for the safety assessment and analysis of ECC in engineering structural applications after fire. |
| format | Article |
| id | doaj-art-5e8ba585476b4be4891e9bb2ff7c8c36 |
| institution | OA Journals |
| issn | 2214-5095 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj-art-5e8ba585476b4be4891e9bb2ff7c8c362025-08-20T02:07:16ZengElsevierCase Studies in Construction Materials2214-50952024-12-0121e0404910.1016/j.cscm.2024.e04049Study on fracture mechanical properties and mechanism of engineered cementitious composites (ECC) after high temperatureLiangqin Wu0Zhiyong Zhu1Tianqian Wu2Renfeng Li3Zhenpeng Yu4Qiang Feng5Dongyi Xie6School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, ChinaSchool of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, ChinaDepartment of Civil Engineering, School of Mechanics and Engineering Science, Shanghai University, Shanghai 200444, ChinaSchool of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, ChinaDepartment of Civil Engineering, School of Mechanics and Engineering Science, Shanghai University, Shanghai 200444, China; Corresponding author.Xinjiang Tarim River Basin Authority, Korla 841000, ChinaShandong Province Yiyuan County Natural Resources Bureau, Zibo 256199, ChinaThe low melting point characteristics of organic fibers restrict the utilization of ECC in engineering applications. In this paper, the fracture mechanical properties of ECC were studied considering temperature and polyethylene fiber content, and the crack propagation rule and potential mechanism of ECC were clarified by using digital image correlation (DIC) technology and microscopic testing technology. The following conclusions are mainly obtained through the study. When the fiber content is 0 %, with the increase of temperature, the unstable fracture load, initial fracture toughness and unstable fracture toughness of the specimen are all reduced, while the fracture energy increases first and then decreases. When the fiber content is 0.5 %, 1 % and 1.5 %, the fracture parameters (unstable fracture load, fracture energy, initial fracture toughness and unstable fracture toughness) of the specimens decrease with the increase of temperature, and the decrease of the fracture parameters of the specimens is more obvious especially at 400℃ and later. The higher the PE fiber content, the more the fracture parameter is reduced by the temperature effect. The fracture parameters of the specimens increased significantly with the increase of PE fiber content at both room temperature/20℃ and 200℃, while the fracture parameters of the specimens decreased with the increase of fiber content when the temperature was not lower than 400°C, but the decrease was not significant. The results of the DIC technique showed that, with the increase of temperature, the crack initiation stage is advanced, the rapid crack development period is delayed. The development trend of crack length of the specimen is slowed down. At the same time, the mechanism of high temperature on the deterioration of ECC fracture mechanical properties under different PE fiber content was revealed. The results of this paper provide a theoretical basis for the safety assessment and analysis of ECC in engineering structural applications after fire.http://www.sciencedirect.com/science/article/pii/S2214509524012014Engineered cementitious composites (ECC)High temperaturePE fiber contentFracture mechanical propertiesFailure mechanism |
| spellingShingle | Liangqin Wu Zhiyong Zhu Tianqian Wu Renfeng Li Zhenpeng Yu Qiang Feng Dongyi Xie Study on fracture mechanical properties and mechanism of engineered cementitious composites (ECC) after high temperature Case Studies in Construction Materials Engineered cementitious composites (ECC) High temperature PE fiber content Fracture mechanical properties Failure mechanism |
| title | Study on fracture mechanical properties and mechanism of engineered cementitious composites (ECC) after high temperature |
| title_full | Study on fracture mechanical properties and mechanism of engineered cementitious composites (ECC) after high temperature |
| title_fullStr | Study on fracture mechanical properties and mechanism of engineered cementitious composites (ECC) after high temperature |
| title_full_unstemmed | Study on fracture mechanical properties and mechanism of engineered cementitious composites (ECC) after high temperature |
| title_short | Study on fracture mechanical properties and mechanism of engineered cementitious composites (ECC) after high temperature |
| title_sort | study on fracture mechanical properties and mechanism of engineered cementitious composites ecc after high temperature |
| topic | Engineered cementitious composites (ECC) High temperature PE fiber content Fracture mechanical properties Failure mechanism |
| url | http://www.sciencedirect.com/science/article/pii/S2214509524012014 |
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