Influence of key design variables on dynamic material properties of iron tailing porous concrete under impact loading
Iron tailing porous concrete (ITPC) is a new foamed concrete material that using iron ore tailing powder to partially replace the cement. Previous investigations on ITPC primarily focused on its mechanical properties under static loads or low strain rate conditions, leaving a significant gap in its...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-04-01
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| Series: | Developments in the Built Environment |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666165924000826 |
| _version_ | 1797253937658593280 |
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| author | Chao Li Shawei Zhang Pengfei Liu Hongnan Li Shibin Lin Jinlong Si Wensu Chen Hong Hao |
| author_facet | Chao Li Shawei Zhang Pengfei Liu Hongnan Li Shibin Lin Jinlong Si Wensu Chen Hong Hao |
| author_sort | Chao Li |
| collection | DOAJ |
| description | Iron tailing porous concrete (ITPC) is a new foamed concrete material that using iron ore tailing powder to partially replace the cement. Previous investigations on ITPC primarily focused on its mechanical properties under static loads or low strain rate conditions, leaving a significant gap in its impact resistance performance at high strain rates. This study employed the split Hopkinson pressure bar (SHPB) to test ITPC specimens under impact loading with strain rate around 120 s−1. Density, water-binder (W/B) ratio, iron tailing powder content, polypropylene fiber length and content were taken as key design variables to prepare the ITPC specimens with different mix ratios and study their effects on the dynamic material properties of ITPC. Specifically, the failure modes, stress-strain relations, elastic moduli, compressive strengths and energy dissipation densities of the ITPC specimens with various design variables were recorded and compared. The test results indicate that the material density, fiber length and content have strong influences on the impact failure modes of ITPC. The elastic modulus, compressive strength and energy dissipation density of ITPC exhibit exponential growth with the material density. These parameters, however, show an initial growth followed by a decrease with the rising W/B ratio, fiber length and fiber content, and they reach the peak values at around 0.70, 9 mm and 2.0%, respectively. Moreover, the iron tailing powder content of 25% is recommended for ITPC for maintaining good impact resistance. |
| first_indexed | 2024-04-24T21:42:00Z |
| format | Article |
| id | doaj.art-d3fddc6effdd4b69b4d17e273da94c48 |
| institution | Directory Open Access Journal |
| issn | 2666-1659 |
| language | English |
| last_indexed | 2024-04-24T21:42:00Z |
| publishDate | 2024-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Developments in the Built Environment |
| spelling | doaj.art-d3fddc6effdd4b69b4d17e273da94c482024-03-21T05:37:41ZengElsevierDevelopments in the Built Environment2666-16592024-04-0118100401Influence of key design variables on dynamic material properties of iron tailing porous concrete under impact loadingChao Li0Shawei Zhang1Pengfei Liu2Hongnan Li3Shibin Lin4Jinlong Si5Wensu Chen6Hong Hao7Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian, 116024, ChinaFaculty of Infrastructure Engineering, Dalian University of Technology, Dalian, 116024, ChinaSchool of Civil Engineering, Shenyang Jianzhu University, Shenyang, 110168, ChinaFaculty of Infrastructure Engineering, Dalian University of Technology, Dalian, 116024, China; School of Civil Engineering, Shenyang Jianzhu University, Shenyang, 110168, ChinaState Key Laboratory of Precision Blasting, Jianghan University, Wuhan, 430056, China; Corresponding author.China State Construction Second Engineering Bureau Co., Ltd, Beijing, ChinaCentre for Infrastructural Monitoring and Protection, School of Civil and Mechanical Engineering, Curtin University, Australia; Corresponding author.Centre for Infrastructural Monitoring and Protection, School of Civil and Mechanical Engineering, Curtin University, AustraliaIron tailing porous concrete (ITPC) is a new foamed concrete material that using iron ore tailing powder to partially replace the cement. Previous investigations on ITPC primarily focused on its mechanical properties under static loads or low strain rate conditions, leaving a significant gap in its impact resistance performance at high strain rates. This study employed the split Hopkinson pressure bar (SHPB) to test ITPC specimens under impact loading with strain rate around 120 s−1. Density, water-binder (W/B) ratio, iron tailing powder content, polypropylene fiber length and content were taken as key design variables to prepare the ITPC specimens with different mix ratios and study their effects on the dynamic material properties of ITPC. Specifically, the failure modes, stress-strain relations, elastic moduli, compressive strengths and energy dissipation densities of the ITPC specimens with various design variables were recorded and compared. The test results indicate that the material density, fiber length and content have strong influences on the impact failure modes of ITPC. The elastic modulus, compressive strength and energy dissipation density of ITPC exhibit exponential growth with the material density. These parameters, however, show an initial growth followed by a decrease with the rising W/B ratio, fiber length and fiber content, and they reach the peak values at around 0.70, 9 mm and 2.0%, respectively. Moreover, the iron tailing powder content of 25% is recommended for ITPC for maintaining good impact resistance.http://www.sciencedirect.com/science/article/pii/S2666165924000826Iron tailing porous concrete (ITPC)Key design variablesSplit hopkinson pressure bar (SHPB)Impact resistance performance |
| spellingShingle | Chao Li Shawei Zhang Pengfei Liu Hongnan Li Shibin Lin Jinlong Si Wensu Chen Hong Hao Influence of key design variables on dynamic material properties of iron tailing porous concrete under impact loading Developments in the Built Environment Iron tailing porous concrete (ITPC) Key design variables Split hopkinson pressure bar (SHPB) Impact resistance performance |
| title | Influence of key design variables on dynamic material properties of iron tailing porous concrete under impact loading |
| title_full | Influence of key design variables on dynamic material properties of iron tailing porous concrete under impact loading |
| title_fullStr | Influence of key design variables on dynamic material properties of iron tailing porous concrete under impact loading |
| title_full_unstemmed | Influence of key design variables on dynamic material properties of iron tailing porous concrete under impact loading |
| title_short | Influence of key design variables on dynamic material properties of iron tailing porous concrete under impact loading |
| title_sort | influence of key design variables on dynamic material properties of iron tailing porous concrete under impact loading |
| topic | Iron tailing porous concrete (ITPC) Key design variables Split hopkinson pressure bar (SHPB) Impact resistance performance |
| url | http://www.sciencedirect.com/science/article/pii/S2666165924000826 |
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