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| 固井水泥石抗冲击力学性能规律研究 |
| Study on the law of impact resistance mechanical properties of cementing cement stone |
| 投稿时间：2025-05-12 修订日期：2025-05-12 |
| DOI： |
| 中文关键词: 冲击力学 霍普金森杆 SEM 水泥浆体系 水化程度 |
| 英文关键词: Impact mechanics Hopkinson bar SEM Cement slurry system Degree of hydration |
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| 中文摘要: |
| 固井水泥石在井底服役时抗动态冲击的能力是制约固井水泥环完整性的关键因素之一。本文采用霍普金森杆对川渝地区在用水泥浆体系在不同的冲击载荷下的抗冲击性能进行测试，并通过扫描电子显微镜（SEM）对冲击前后的试样进行形貌分析。实验结果表明，随着养护龄期的延长，不同体系的抗冲击性能应力极值增大、试样吸收能量更多；通过表面微观形貌分析可知，裂纹的扩展会避开Ca(OH)2、以及Ⅲ型水化硅酸钙（C-S-H）凝胶等水化程度较深的区域。 |
| 英文摘要: |
| The dynamic impact resistance of cement stone during its service at the bottom of the well is one of the key factors affecting the integrity of the cement sheath. In this study, the Hopkinson bar was used to test the impact performance of cement slurry systems in use in the Sichuan-Chongqing region under different impact loads. Scanning electron microscopy (SEM) was employed to analyze the morphological changes of the specimens before and after impact. The experimental results indicated that with the increase in curing age, the stress peak values of the impact resistance increased, and the specimens absorbed more energy. Through surface microstructure analysis, it was found that crack propagation tends to avoid regions with higher degrees of hydration, such as Ca(OH)2 and type III hydrated calcium silicate (C-S-H) gel. |
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