对GBFS-HPMC/纤维通透混凝土的性能分析和混合物优化
Xiwen Yan1, Xuezhi Wang1, Chuanwu Sun1
1School of Civil and Architectural Engineering, Liaoning University of Technology, Jinzhou 121001, China.
Materials (Basel, Switzerland)
|October 14, 2023
概括
这项研究使用颗粒高炉渣 (GBFS),基基甲基纤维素 (HPMC) 和聚烯塑料织纤维 (PPTF) 增强了透的混凝土性能. 优化的添加剂显著改善了可持续基础设施的机械强度和水透性.
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
- 环境工程 环境工程
背景情况:
- 透路面可以减少雨水的流失,减轻城市洪水和热岛效应.
- 透水混凝土是可持续城市基础设施的关键材料,但其机械性能需要优化.
- 结合额外的固材料和纤维可以提高混凝土的性能.
研究的目的:
- 为了研究颗粒高炉渣 (GBFS),基甲基纤维素 (HPMC) 和聚烯塑料织纤维 (PPTF) 对透水混凝土的影响.
- 分析这些添加剂对机械性能 (压力,拉力,屈曲强度) 和水透性的影响.
- 为了优化添加剂比例,使用灰色相关性分析来提高性能.
主要方法:
- 使用正交的实验设计,系统地改变混合物比例.
- 测量了机械性能 (立方压力,终极拉力,屈曲强度) 和水的透性.
- 使用扫描电子显微镜 (SEM) 和能量分散光谱 (EDS) 进行了微结构分析.
- 灰色相关性分析用于添加剂优化.
主要成果:
- 使用GBFS,HPMC和PPTF的透水混凝土实现了高机械强度:25.22 MPa (立方压力),3.36 MPa (拉力) 和5.39 MPa (弹性).
- 微观结构分析显示,由于GBFS衍生的酸盐水合物 (C-S-H) 凝增强了结合,并且从PPTF中改善了矩阵稳定性.
- 优化的添加剂比例带来了显著的改进:立方压力强度增加7.2%,分裂拉伸强度增加2.1%,曲强度增加2.5%.
结论:
- 结合使用GBFS,HPMC和PPTF有效地提高了透水混凝土的机械性能和透性.
- 在改善混凝土矩阵和界面过渡区方面,GBFS水化产品和PPTF加强起着至关重要的作用.
- 通过灰色相关性分析优化添加剂提供了一个可行的策略,以最大限度地提高可持续建设的透水混凝土的性能.
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