工程地质聚合物复合材料与混合PE/PVA纤维和混凝土基板之间的粘合行为评估
Yu Ling1, Xiafei Zhang1, Yanwei Wu1
1Guangzhou Power Supply Bureau, Guangdong Power Grid Co., Ltd., China Southern Power Grid Co., Ltd., Guangzhou 510620, China.
Materials (Basel, Switzerland)
|August 10, 2024
概括
这项研究开发了一种具有成本效益的混合工程地质聚合物复合材料 (EGC),使用聚乙烯 (PE) 和聚乙烯醇 (PVA) 纤维用于混凝土维修. 混合EGC显示了更好的拉伸柔性和接口粘合,提供了44.2%的成本降低.
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.
- 复合材料 复合材料 复合材料
背景情况:
- 工程地质聚合物复合材料 (EGCs) 显示出由于其柔性和裂纹控制,对混凝土修复有希望.
- 高钢筋纤维成本和EGC-混凝土粘合不良限制了EGC的应用.
- 开发具有成本效益和增强界面性能的EGC对于广泛采用至关重要.
研究的目的:
- 为了研究一种混合聚乙烯 (PE) /聚乙烯醇 (PVA) 纤维增强EGC,使用负担得起的无油PVA纤维.
- 在各种条件下评估EGC-混凝土接口的结合性能.
- 评估混合EGC用于混凝土结构维修的成本效益.
主要方法:
- 合成的混合PE/PVA纤维增强EGC具有不同的PE纤维含量,PE/PVA比率和飞灰 (FA) /地面颗粒高炉渣 (GGBS) 的比率.
- 进行了直接拉力和斜切试验,以评估EGC-混凝土接口粘合强度.
- 对EGC进行压力强度和弹性模量测试.
- 分析了混合EGC的成本效益比.
主要成果:
- EGC的压力强度在77.1到108.9MPa之间;更高的GGBS含量增加了强度和弹性模量.
- 与单纯的PE纤维相比,PE/PVA比率为1.0的PE/PVA比率提高了8.5%的抗拉强度.
- 增加的PE纤维含量,PVA/PE比率,GGBS含量和混凝土基板强度提高了剪接强度.
- 使用50%PVA纤维替代的混合EGC降低了44.2%的成本,同时保持了性能.
结论:
- 混合PE/PVA纤维EGC为混凝土维修提供了可行的解决方案,平衡了增强的拉伸柔性和裂纹控制,提高了经济效率.
- 该研究强调了未油的PVA纤维在EGC应用中降低成本的潜力.
- 进一步优化纤维比率和接口设计可以提高EGC适用于混凝土维修的适用性.
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