实验研究高强度轻质混凝土梁的剪切行为,结合氧化石墨烯氧化物
Xiaojiang Hong1, Jin Chai Lee2, Bo Qian3
1Department of Civil Engineering, Faculty of Civil and Hydraulic Engineering, Xichang University, Xichang, 615013, China. hxjxcxy@126.com.
Scientific reports
|November 15, 2024
概括
添加少量的石墨烯氧化物 (GO) 显著提高了高强度轻质混凝土 (HSLWC) 梁的剪切能力. 最高的GO含量 (0.05%) 增加了39.2%的负载能力,提高了结构性能.
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:
- 石墨烯氧化物 (GO) 在水泥材料中表现有前途.
- 关于高强度轻质混凝土 (HSLWC) 结构中GO的结构影响的研究有限.
- 这种差距阻碍了GO在HSLWC中的实际工程应用.
研究的目的:
- 研究低氧化石墨烯 (GO) 度对高强度轻质混凝土 (HSLWC) 梁的剪切行为的影响.
- 评估不同的GO含量对剪切能力,故障模式和裂传播的影响.
- 提出一个修改后的模型来预测GO修改的HSLWC梁的剪切能力.
主要方法:
- 制造了4个HSLWC光束,其GO含量在0%至0.05%之间.
- 梁使用300kN伺服加载装置承受四点负荷.
- 系统地分析了故障模式,负载变形,剪切能力,裂纹和负载应变行为.
主要成果:
- 所有测试的梁都显示了剪切压缩故障模式.
- 加入氧化石墨烯 (GO) 增强了HSLWC梁的剪切能力,改进与GO含量呈正相关.
- 与控制样本相比,含有0.05%GO的光束表现出最大最终负载增加39.2%.
- 添加GO使HSLWC梁具有一定程度的可塑性.
结论:
- 低度的氧化石墨烯 (GO) 有效地提高了高强度轻质混凝土 (HSLWC) 梁的剪切能力和性能.
- 该研究提供了一种经过验证的模型,用于预测GO增强HSLWC结构的剪切能力.
- 这些发现支持GO在设计先进的HSLWC结构元件方面的工程应用.
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