纳米修饰泡混凝土的机械性能研究通过微内嵌碳纳米管改进
Shukun Zhang1, Peng Jiang1, Haohao Wang1
1School of City and Architecture Engineering, Zaozhuang University, Zaozhuang 277160, China.
Materials (Basel, Switzerland)
|January 10, 2026
概括
碳纳米管 (CNTs) 增强了泡混凝土的强度和密度平衡. 最佳的CNT整合率为0.05%,显著改善机械性能,而不会显著增加密度.
科学领域:
- 土木工程 土木工程是指土木工程.
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
背景情况:
- 泡混凝土是一种轻量级,环保的材料,用于绝缘和管道填充.
- 现有的泡混凝土缺乏足够的机械性能,以满足诸如弱岩支等苛刻应用.
- 碳纳米管 (CNTs) 提供了提高水泥材料性能的潜力.
研究的目的:
- 提高泡混凝土的机械性能,使用CNT用于减压填充材料.
- 分析五个因素对CNT增强泡混凝土 (CNTFC) 密度和特异强度的影响.
- 为了澄清泡混凝土中CNT的强化机制.
主要方法:
- 准备CNT泡混凝土 (CNTFC) 含有不同的飞灰 (FA) 含量,聚合物-水泥比率,水粘合比率,CNT含量和泡体积.
- 分析密度,2:1的气强度,分裂拉伸强度和特定强度.
- 结合应力-应变分析和扫描电子显微镜 (SEM) 来了解增强机制.
主要成果:
- 泡体积分数,水结合剂比率和聚合物-水泥比率是影响强度的主要因素.
- 只有CNT的结合才显著增加了2:1的气强度,分裂拉伸强度和特定强度.
- 最佳的CNT含量为0.05% (按重量的水泥材料计算),使压力强度增加15.3%,拉伸强度增加6.5%,密度增加仅为2.0%.
结论:
- 将0.05%的CNTs纳入泡混凝土中,优化了泡混凝土中高强度和低密度之间的平衡.
- CNTs与水泥水合物形成一个交织的网络,通过纳米伸缩强度增强机械性能.
- 过度的CNT兴奋剂 (>0.05%) 会导致聚合和毛孔结构恶化,降低强度和延展性.
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