在持续压缩负荷下对智能水泥复合材料的累积损伤和自我修复性能进行实验性调查
Weihong Chen1, Chunhui Han1, Yi Liu1
1College of Civil Engineering, Fuzhou University, Fuzhou 350116, China.
Materials (Basel, Switzerland)
|September 28, 2023
概括
智能水泥复合材料 (SMA-ECC) 在持续负荷下显示减少累积损伤和增强自我修复能力. 这种材料在较低的负载下表现出显著的不透性和修复率高达100%.
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.
- 结构健康监测 结构健康监测
背景情况:
- 工程混凝土复合材料 (ECC) 是以柔性而闻名的先进材料.
- 自愈材料旨在自主修复损坏,延长使用寿命.
- 形状记忆合金 (SMA) 为智能材料应用提供了独特的特性.
研究的目的:
- 评估在持续负荷下基于智能水泥的自愈复合材料 (SMA-ECC) 的累积损伤.
- 评估SMA-ECC在各种压缩负载级别的自我修复性能.
- 将SMA-ECC的损伤和愈合特征与传统的ECC进行比较.
主要方法:
- 在SMA-ECC和ECC空心圆柱体样本上进行了单轴压缩试验.
- 标本经历了五个负荷级别 (0-60%的压力强度).
- 累积损害的量化方法是使用总吸水量的变化和标准化含水量指数来量化.
主要成果:
- 与ECC相比,SMA-ECC的累积吸水量比ECC低35%,这表明无法修复的损害较少.
- 在30%和40%的负载水平下,SMA-ECC显示出100%的自我修复修复率.
- 即使在60%的负载水平下,SMA-ECC也保持了76%的维修率.
结论:
- 与ECC相比,SMA-ECC具有更高的无性和自我愈合能力.
- 该材料有效地减轻了持续负载下的累积损伤.
- 在需要增强耐用性和自主修复的应用中,SMA-ECC显示出巨大的潜力.
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