在振动下高混凝土的性能演变:振动时间对机械,耐用性和界面性能的影响
Shiwei Sun1,2, Junmin Shen3, Haoqin Guo1,2
1School of Materials Science and Engineering, Chang'an University, Middle Section of South Second Ring Road, Xi'an 710064, China.
Materials (Basel, Switzerland)
|December 11, 2025
概括
振动时间对高倾斜混凝土性能产生了重大影响. 早期的振动可以最初提高强度,但会对长期耐用性和粘合强度产生负面影响,特别是在施工过程中. 优化振动是混凝土可靠性的关键.
科学领域:
- 土木工程 土木工程是指土木工程.
- 材料科学 材料科学 材料科学
- 建筑工程工程 建筑工程
背景情况:
- 高倾斜混凝土的低粘度和凝聚力使其易受振动的影响.
- 在桥梁施工过程中,车辆与桥梁相结合的振动构成了重大挑战.
- 了解振动效应对于混凝土的性能和耐用性至关重要.
研究的目的:
- 在模拟建筑振动下调查高倾斜混凝土的性能恶化.
- 分析振动定时对机械性能,耐用性和微观结构的影响.
- 澄清了控制高倾斜混凝土在振动下演变的机制.
主要方法:
- 模拟的振动模式反映了建筑场景.
- 评估机械性能 (例如压力强度) 和耐用性 (例如,磨损,化物耐用性).
- 使用扫描电子显微镜 (SEM) 进行微结构分析.
主要成果:
- 早期的振动增强了早期的压力强度,但随着时间的推移,这种效果会减弱.
- 在造到最终设置期间的振动显著降低了接口键强度.
- 从最初到最后的设置振动可以稍微改善或最小损坏结合.
- 耐久性受到不同的影响:初始到最终的设置削弱了/磨损抵抗;造到最终的设置改善了孔隙结构和化物抵抗.
- SEM显示分散的水化产品,减少了C-S-H凝,增加了微裂.
结论:
- 振动时间是影响高倾斜混凝土性能和耐用性的关键因素.
- 特定的振动阶段 (造到最终设置与初始到最终设置) 对接口粘合和材料特性有不同的影响.
- 优化的振动程序对于确保高倾斜混凝土结构的长期可靠性和耐用性至关重要.
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