废弃的贝取代细料对混凝土的动态机械特性的影响
Yanling Lin1,2,3, Yuzhe Ren2,3, Tiange Ge2,3
1School of Construction Engineering, Jiangsu Open University, No.399 North Jiangdong Road, Nanjing, China.
Scientific reports
|August 27, 2024
概括
废贝 (WOS) 可以取代混凝土中的细聚合物,改善动态机械性能,可达到20%的替代率. 除此之外,由于空气含量增加,性能下降,突出了WOS在可持续,抗冲击建筑方面的潜力.
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.
- 可持续建筑 可持续建筑
背景情况:
- 废贝 (WOS) 为混凝土生产中使用河沙作为细聚合物提供了一个可持续的替代品.
- 环境的好处包括减少了河流沙的过度开采和改善了WOS废物管理.
- 关于WOS混凝土动态机械性能的研究有限,主要关注静态特性.
研究的目的:
- 调查WOS作为细聚合物的替代品对混凝土动态机械性能的影响.
- 为了确定最佳的WOS替换比率,以提高动态性能.
- 阐明控制动态性质随着WOS含量增加而变化的机制.
主要方法:
- 使用Split Hopkinson压力杆 (SHPB) 技术进行实验测试.
- WOS替代比率 (Sr) 从0%到100%的系统变化.
- 对峰值应力,弹性模量,能量吸收和水吸收率的分析.
主要成果:
- 峰应力和弹性模量最初随Sr增加到20%,然后指数级下降.
- 20%的WOS替换比率 (Sr = 20%) 显示了在冲击下最大的能量吸收.
- 孔隙填充效应主导高达20%的Sr,而增加的空气含量会对超过20%的Sr的属性产生负面影响.
结论:
- 可以有效地利用WOS作为精细聚合物来增强混凝土的动态机械性能.
- 最佳性能是在20%的Sr下实现的,这表明能量吸收和抗冲击性能优越.
- 结果支持WOS在可持续建筑中的使用,以改善抗冲击结构中的材料性能.
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