基于正交实验设计的多尺度纤维增强水泥矩阵复合材料的最佳设计
Kaixin Qiu1, Song Chen1, Chen Wang1
1College of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan 430068, China.
Polymers
|July 14, 2023
概括
本研究介绍了使用聚乙醇纤维 (PVA),碳酸胡须 (CW) 和碳纳米管 (CNT) 增强水泥复合材料的多尺度纤维增强水泥材料 (MSFRCC). 优化的混合物显著提高了曲和分裂拉伸强度,同时略有降低了压力强度和离子透性.
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.
- 纳米技术纳米技术
背景情况:
- 水泥矩阵复合材料表现出多个规模,多个阶段的故障过程.
- 解决跨尺度的缺陷对于提高基于水泥的材料性能至关重要.
- 结合纤维和飞灰 (FA) 可以减轻损伤并增强整体性能.
研究的目的:
- 设计和评估一种新的多尺度纤维增强水泥复合材料 (MSFRCC).
- 研究聚乙醇纤维 (PVA),碳酸胡须 (CW) 和碳纳米管 (CNT) 在不同尺度对水泥复合材料性能的影响.
- 使用灰色相关性分析优化混合比率以提高整体性能.
主要方法:
- 使用飞灰 (FA) 结合PVA (毫米),CW (微米) 和CNT (纳米) 的MSFRCC的开发.
- 坐标测试设计用于评估压力强度,屈曲强度,分裂拉伸强度和离子透性.
- 基于实验数据优化整体性能的灰色相关性分析.
主要成果:
- 对整体性能的优化组合比率被确定为PVA: 1.5%,CW: 2%,CNTs: 0.1%,FA: 40%.
- 与个人最佳结果相比,最终优化的MSFRCC显示压力强度下降了8.9%,但曲强度增加了28.4%,分裂拉伸强度增加了10%.
- 在优化的MSFRCC中,离子透系数下降了5.7%.
结论:
- 开发的MSFRCC显著改善了曲和分裂拉伸性能.
- 虽然压力强度和化物耐受性与单一最佳组相比略有下降,但整体性能提升值是显著的.
- 该研究验证了多尺度增强在延迟损坏和改善基于水泥的复合材料性能方面的有效性.
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