Experimental study on dynamic characterisation of ultra-high performance concrete (UHPC) after cryogenic freeze-thaw cycles
文献类型：期刊论文
| 作者 | Chi, Kaiyi2; Li, Jun2; Shao, Ruizhe2; Wu, Chengqing1,2 |
| 刊名 | CEMENT & CONCRETE COMPOSITES
 |
| 出版日期 | 2025-07-01 |
| 卷号 | 160页码:15 |
| 关键词 | Cryogenic FT cycles UHPC Compressive strength Strain rate effect |
| ISSN号 | 0958-9465 |
| DOI | 10.1016/j.cemconcomp.2025.106011 |
| 英文摘要 | The increasing demand for advanced construction materials capable of withstanding extreme environmental conditions has prompted extensive research into ultra-high performance concrete (UHPC). This study investigated the dynamic compressive properties of UHPC after cryogenic freeze-thaw (FT) cycles. UHPC specimens were exposed to 2, 4 and 8 FT cycles at -160 degrees C before being tested under dynamic loading conditions at the strain rate of 80, 130 and 180 s- 1 by the use of a Split Hopkinson Pressure Bar (SHPB) device. The effects of strain rate and FT cycles on the compressive strength, energy absorption capacity, and microstructural changes of UHPC were examined. Results revealed that dynamic compressive strength increased with strain rate for all FT cycle conditions. The study also found that the dynamic increase factor (DIF) of UHPC was influenced by FT exposure, higher DIFs were observed after more FT cycles. The DIF after 4 and 8 FT cycles increased 1.31 % and 2.61 %, respectively, in comparison with 2 FT cycles at the strain rate of 130 s- 1. Repeated FT cycles led to progressive deterioration of the UHPC matrix and fibre-matrix interface, as evidenced by Scanning Electron Microscopy (SEM) analysis. After 8 FT cycles, the Calcium Silicate Hydrate (C-S-H) structure experienced further damage, with noticeable cracks forming between the steel fibres and matrix, indicating a weakening of the bond between these components. The behaviour and durability of UHPC under extreme environmental and dynamic loading conditions are better understood during this research. |
| 资助项目 | ARC[DP210101100] |
| WOS研究方向 | Construction & Building Technology ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:001443756000001 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/36423]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Li, Jun; Wu, Chengqing |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, Wuhan 430071, Peoples R China 2.Univ Technol Sydney, Sch Civil & Environm Engn, Sydney, NSW 2007, Australia |
| 推荐引用方式 GB/T 7714 | Chi, Kaiyi,Li, Jun,Shao, Ruizhe,et al. Experimental study on dynamic characterisation of ultra-high performance concrete (UHPC) after cryogenic freeze-thaw cycles[J]. CEMENT & CONCRETE COMPOSITES,2025,160:15. |
| APA | Chi, Kaiyi,Li, Jun,Shao, Ruizhe,&Wu, Chengqing.(2025).Experimental study on dynamic characterisation of ultra-high performance concrete (UHPC) after cryogenic freeze-thaw cycles.CEMENT & CONCRETE COMPOSITES,160,15. |
| MLA | Chi, Kaiyi,et al."Experimental study on dynamic characterisation of ultra-high performance concrete (UHPC) after cryogenic freeze-thaw cycles".CEMENT & CONCRETE COMPOSITES 160(2025):15. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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