关于BFRP条与海水沙混凝土的粘合性能研究
Guohao Guan1, Xuezhi Wang1, Ming Xin1
1School of Civil and Architectural Engineering, Liaoning University of Technology, Jinzhou 121001, China.
Materials (Basel, Switzerland)
|April 9, 2024
概括
这项研究检查了基岩纤维增强聚合物 (BFRP) 与海水砂混凝土 (SSC) 的增强粘合. 合纤维提高了混凝土的柔性,而喷砂BFRP显示出比螺纹型更好的粘合性能,特别是在5D粘合长度下.
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
- 结构工程 结构工程
背景情况:
- 海水砂混凝土 (SSC) 容易由于内部裂,盐晶和硫酸盐腐蚀产品而易变脆.
- 岩纤维增强聚合物 (BFRP) 增强为传统钢铁增强提供了替代方案.
研究的目的:
- 在各种条件下研究BFRP钢筋与SSC的粘合性能.
- 评估合纤维和表面处理对粘合性能的影响.
- 开发BFRP和SSC之间的债券滑动行为的组成模型.
主要方法:
- 在SSC中嵌入的66个BFRP钢筋 (12毫米直径) 样本上进行了拉出测试.
- 各种参数包括玻璃和聚烯纤维的体积剂量 (0.1%0.3%),混合纤维比率 (1:2, 1:1, 2:1),粘接长度 (3D,5D,7D) 和钢筋表面处理 (吹砂,螺纹).
主要成果:
- SSC的脆弱性导致了在撤离测试中的脆弱分裂失败.
- 合纤维增强了混凝土的柔性,提高了粘合性能.
- 与螺纹钢筋相比,喷砂BFRP钢筋与SSC的结合性更强.
- 在5D.的债券长度下实现了最佳的结合.
结论:
- 合纤维显著提高SSC的延展性,减轻脆性故障模式.
- 喷砂BFRP增强材料表现出与SSC相比有线类型的优越结合性能.
- 结合Malvar和改进的BPE模型的组成模型准确地描述了债券滑动行为,为未来的研究提供了理论基础.
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