通过纳米-TiC-BF飞灰研究混凝土的机械性能
1College of Water Resources and Electricity, Heilongjiang University, Harbin, 150080, China.
Scientific reports
|February 27, 2024
概括
这项研究使用纳米碳化物 (nano-TiC),玄武岩纤维 (BF) 和飞灰 (FA) 来优化混凝土的性能. 最佳比率提高了机械强度和密度,验证了响应表面方法模型.
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.
- 混凝土技术 混凝土技术
背景情况:
- 超高层建筑需要高强度的混凝土,通常无法通过普通混合物来满足.
- 虽然基岩纤维 (BF) 和飞灰 (FA) 是已确立的混凝土添加剂,但纳米碳化物 (nano-TiC) 显示出显著的未开发潜力.
- 混凝土中BF,FA和纳米TiC的协同效应需要进一步研究增强的机械性能.
研究的目的:
- 研究纳米-碳化物 (纳米-TiC),玄武岩纤维 (BF) 和飞灰 (FA) 对混凝土机械性能的联合影响.
- 使用响应表面方法 (RSM) 优化这些添加剂的混合比,以提高混凝土的性能.
- 分析修改混凝土的损伤特征和微观结构变化.
主要方法:
- 将纳米-TiC,BF和FA纳入混凝土,以制造TBF混凝土.
- 响应表面方法 (RSM) 的应用,以优化机械性能 (压力,分裂拉力,屈曲强度).
- 使用扫描电子显微镜 (SEM) 分析混凝土崩,压力变形和水泥矩阵微结构.
主要成果:
- 飞灰 (FA) 增加了混凝土的崩,而纳米-TiC和BF降低了它.
- 纳米-TiC,FA和BF的组合添加在单轴压缩下改善了压缩损伤状态.
- 确定了最佳的混合比率:0.88%的纳米-TiC,0.24%的BF和5.49%的FA,显著提高了机械性能和混凝土密度.
结论:
- 中量的纳米-TiC,BF和FA协同增强混凝土的机械性能和微观结构.
- RSM优化模型准确地预测了TBF混凝土的机械性能.
- 开发的TBF混凝土为现代建筑中的高强度要求提供了有希望的解决方案.
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