关于复合材料修改的环氧树脂灌装粘合剂用于修复斜裂纹的性能研究
Zimin Chen1, Zhengyi Li1, Zhihong Ran1
1School of Architecture and Planning, Yunnan University, Kunming 650500, China.
Materials (Basel, Switzerland)
|July 12, 2025
概括
这项研究开发了一种新的复合环氧粘合剂,用于修复钢筋混凝土的裂. 与传统环氧树脂相比,新材料显著提高了结构完整性和承载能力.
科学领域:
- 材料科学 材料科学 材料科学
- 土木工程 土木工程是指土木工程.
- 结构工程 结构工程
背景情况:
- 钢筋混凝土结构在使用寿命期间容易发生微裂.
- 有效的维修策略对于保持结构完整性和寿命至关重要.
研究的目的:
- 制定和评估一种新型的复合材料改性环氧陶粘合剂,用于修复钢筋混凝土的斜裂.
- 为了比较其与单元修饰环氧粘合剂的性能.
- 确定控制斜裂纹修复的关键参数和机制.
主要方法:
- 使用纳米-TiO2,碳素终结布达酸液体 (CTBN) 和D-669.使用复合粘合剂的配方.
- 系统地评估机械性能 (抗拉强度,破裂时的延长,结合强度) 和粘度.
- 在梁的斜裂上修复有效性的实验性评估.
- 分析钢混凝土接口的修复机制.
主要成果:
- 复合粘合剂显著提高了拉伸强度 (4.07-21.16 MPa),破裂时的延伸 (13.28-20.4%),和粘合强度 (1.05-3.79 MPa) 与单元环氧体相比.
- 粘度降低了48-872mPa·s,促进了更好的透.
- 增强的性和粘合强度有助于抗裂和刚性恢复.
- 粘合剂形成了一个连续的粘合层,改善了能量消散和承载能力.
结论:
- 开发的复合材料改性环氧粘合剂为修复钢筋混凝土斜裂提供了卓越的性能.
- 粘合剂的粘度,性和粘合强度是有效的结构修复的关键因素.
- 该研究提出了一种理论公式,用于计算修复梁的剪切承载能力,以帮助结构设计.
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