对新型平端尼龙纤维钢筋混凝土机械性能进行微结构和统计分析
M Sridhar1, M Vinod Kumar1, N Nagaprasad2
1Department of Civil Engineering, Vel Tech Rangarajan Dr.Sagunthala R&D Institute of Science and Technology, Avadi, Chennai, 600062, Tamil Nadu, India.
Scientific reports
|March 13, 2025
概括
新型平端尼龙纤维 (FENF) 显著提高了混凝土的强度. 与传统混凝土相比,这些FENF提高了粘合和机械性能,例如压力,分裂拉伸和曲强度.
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.
- 结构工程 结构工程
背景情况:
- 混凝土中的宏观合成纤维可能遭受周边粘合不良,导致滑动和机械性能降低.
- 改善纤维矩阵相互作用对于提高混凝土中合成纤维钢筋的有效性至关重要.
研究的目的:
- 调查新型平端尼龙纤维 (FENF) 作为混凝土钢筋的有效性.
- 评估FENF剂量,面积比和形状对混凝土可加工性和机械强度的影响.
- 分析FENF与混凝土矩阵之间的微结构相互作用.
主要方法:
- 在19种混凝土混合物上进行了实验,FENF剂量不同 (0.5%,1%,1.5%),面积比 (35,55,75) 和形状 (直,平底).
- 进行机械强度测试 (压力,分裂拉伸,曲) 以量化改进.
- 使用统计分析 (回归,PCA,RSM) 来确定最佳纤维配置.
- 雇员扫描电子显微镜 (SEM) 用于纤维-矩阵接口的微结构分析.
主要成果:
- 与传统混凝土相比,FENF显示了压力 (高达10.3%),分裂拉力 (高达25.1%) 和屈曲强度 (高达26.1%) 的显著增加.
- 直线尼龙纤维增强混凝土也显示强度增加 (压力高达11.8%,分裂拉力高达13.9%,柔性高达15.9%).
- FENF的平面末端形状对周边粘接产生了积极的影响,从而产生了优越的分裂拉伸和曲性能.
结论:
- 平端尼龙纤维有效地提高了混凝土的机械性能,特别是由于纤维矩阵粘合的改进,使得混凝土的裂纹抗拉和强度提高.
- 纤维形状是优化合成纤维钢筋混凝土性能的一个关键因素.
- 统计和微结构分析为纤维特性及其对混凝土性能的影响提供了洞察力.
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