Axial compression damage constitutive model and damage characteristics of fly ash/silica fume modified magnesium phosphate cement after being treated at different temperatures
The relationship between fly ash (FA) and silica fume (SF)-modified magnesium phosphate cement (MPC) at varying temperatures remains unclear. In this study, the mechanical properties and damage characteristics of FA- and SF-modified MPC at 20–1,000°C were analysed through uniaxial compression tests....
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| Language: | English |
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De Gruyter
2024-12-01
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| Series: | Reviews on Advanced Materials Science |
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| Online Access: | https://doi.org/10.1515/rams-2024-0063 |
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| author | Guo Boyu Zhu Jincai Meng Xiaokai Cao Qi |
| author_facet | Guo Boyu Zhu Jincai Meng Xiaokai Cao Qi |
| author_sort | Guo Boyu |
| collection | DOAJ |
| description | The relationship between fly ash (FA) and silica fume (SF)-modified magnesium phosphate cement (MPC) at varying temperatures remains unclear. In this study, the mechanical properties and damage characteristics of FA- and SF-modified MPC at 20–1,000°C were analysed through uniaxial compression tests. The results indicate that the compressive strength of MPC diminishes at varying temperatures, while FA and SF can enhance the compressive strength of MPC following exposure to high temperatures. In addition, with an increase in the temperature, the peak strain of MPC increased, and the deformation modulus first decreased and then increased. At 1,000°C, the deformation modulus of MPC was 5.09–10.92 GPa. The proposed damage constitutive model can predict the mechanical parameters of FA- and SF-modified MPC at different temperatures. The total damage variable reflects an “S-shaped” change trend under the action of axial compression loads. MPC exhibited irreversible initial temperature damage after being treated at different temperatures. More specifically, the temperature damage variable first increased and then decreased by increasing the temperature. At 600°C, the temperature damage variable exceeds 30% of the total damage variable associated with the peak strain, and at 1,000°C, it surpasses 10%. |
| format | Article |
| id | doaj-art-aa2aa5fc6a4248ef946a42b84a17d9b4 |
| institution | Kabale University |
| issn | 1605-8127 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Reviews on Advanced Materials Science |
| spelling | doaj-art-aa2aa5fc6a4248ef946a42b84a17d9b42025-01-14T14:22:26ZengDe GruyterReviews on Advanced Materials Science1605-81272024-12-01631id. 10414716610.1515/rams-2024-0063Axial compression damage constitutive model and damage characteristics of fly ash/silica fume modified magnesium phosphate cement after being treated at different temperaturesGuo Boyu0Zhu Jincai1Meng Xiaokai2Cao Qi3School of Civil Engineering, Inner Mongolia University of Technology, Inner Mongolia, Hohhot, 010051, ChinaSchool of Civil Engineering, Inner Mongolia University of Technology, Inner Mongolia, Hohhot, 010051, ChinaCollege of Science, Inner Mongolia University of Technology, Inner Mongolia, Hohhot, 010051, ChinaSchool of Civil Engineering, Inner Mongolia University of Technology, Inner Mongolia, Hohhot, 010051, ChinaThe relationship between fly ash (FA) and silica fume (SF)-modified magnesium phosphate cement (MPC) at varying temperatures remains unclear. In this study, the mechanical properties and damage characteristics of FA- and SF-modified MPC at 20–1,000°C were analysed through uniaxial compression tests. The results indicate that the compressive strength of MPC diminishes at varying temperatures, while FA and SF can enhance the compressive strength of MPC following exposure to high temperatures. In addition, with an increase in the temperature, the peak strain of MPC increased, and the deformation modulus first decreased and then increased. At 1,000°C, the deformation modulus of MPC was 5.09–10.92 GPa. The proposed damage constitutive model can predict the mechanical parameters of FA- and SF-modified MPC at different temperatures. The total damage variable reflects an “S-shaped” change trend under the action of axial compression loads. MPC exhibited irreversible initial temperature damage after being treated at different temperatures. More specifically, the temperature damage variable first increased and then decreased by increasing the temperature. At 600°C, the temperature damage variable exceeds 30% of the total damage variable associated with the peak strain, and at 1,000°C, it surpasses 10%.https://doi.org/10.1515/rams-2024-0063magnesium phosphate cementtemperature effectfly ash and silica fumedamage constitutive modeldamage variable |
| spellingShingle | Guo Boyu Zhu Jincai Meng Xiaokai Cao Qi Axial compression damage constitutive model and damage characteristics of fly ash/silica fume modified magnesium phosphate cement after being treated at different temperatures Reviews on Advanced Materials Science magnesium phosphate cement temperature effect fly ash and silica fume damage constitutive model damage variable |
| title | Axial compression damage constitutive model and damage characteristics of fly ash/silica fume modified magnesium phosphate cement after being treated at different temperatures |
| title_full | Axial compression damage constitutive model and damage characteristics of fly ash/silica fume modified magnesium phosphate cement after being treated at different temperatures |
| title_fullStr | Axial compression damage constitutive model and damage characteristics of fly ash/silica fume modified magnesium phosphate cement after being treated at different temperatures |
| title_full_unstemmed | Axial compression damage constitutive model and damage characteristics of fly ash/silica fume modified magnesium phosphate cement after being treated at different temperatures |
| title_short | Axial compression damage constitutive model and damage characteristics of fly ash/silica fume modified magnesium phosphate cement after being treated at different temperatures |
| title_sort | axial compression damage constitutive model and damage characteristics of fly ash silica fume modified magnesium phosphate cement after being treated at different temperatures |
| topic | magnesium phosphate cement temperature effect fly ash and silica fume damage constitutive model damage variable |
| url | https://doi.org/10.1515/rams-2024-0063 |
| work_keys_str_mv | AT guoboyu axialcompressiondamageconstitutivemodelanddamagecharacteristicsofflyashsilicafumemodifiedmagnesiumphosphatecementafterbeingtreatedatdifferenttemperatures AT zhujincai axialcompressiondamageconstitutivemodelanddamagecharacteristicsofflyashsilicafumemodifiedmagnesiumphosphatecementafterbeingtreatedatdifferenttemperatures AT mengxiaokai axialcompressiondamageconstitutivemodelanddamagecharacteristicsofflyashsilicafumemodifiedmagnesiumphosphatecementafterbeingtreatedatdifferenttemperatures AT caoqi axialcompressiondamageconstitutivemodelanddamagecharacteristicsofflyashsilicafumemodifiedmagnesiumphosphatecementafterbeingtreatedatdifferenttemperatures |