在盐作用下使用渣的高性能混凝土的性能
Junchao Yang1,2, Hui Wang3, Ling Peng4
1School of Civil Engineering, Hebei University of Architecture, Zhangjiakou 075000, China.
Materials (Basel, Switzerland)
|April 13, 2024
概括
渣 (MS) 和玄武岩纤维增强了混凝土的耐用性,防止盐损伤. 添加MS和纤维可以减少质量损失,并在冷解和干湿周期期间保持机械强度.
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.
- 混凝土技术 混凝土技术
背景情况:
- 渣 (MS) 具有活跃的水化特性,表明其作为水泥材料的潜力.
- 了解混凝土的耐用性,包括MS和玄武岩纤维在积极的环境条件下,对于实际应用至关重要.
研究的目的:
- 为了评估MS高性能混凝土 (MS-HPC) 与基岩纤维在各种盐暴露条件下的性能.
- 研究MS和玄武岩纤维含量对混凝土抵抗融和干湿周期的降解的影响.
主要方法:
- 准备了MS高性能混凝土 (MS-HPC) 样本,其MS (0-40%) 和玄武岩纤维 (0-2%) 含量各不相同.
- 标本暴露在NaCl冷解周期 (N-FCs),NaCl干湿交替 (N-DAs) 和Na2SO4干湿交替 (NS-DAs) 中.
- 进行了质量,相对动态弹性模量 (RDME),机械强度,SEM-EDS,TG和XRD分析.
主要成果:
- 质量损失率 (MLR) 与多发性硬化和玄武岩纤维含量呈反相关性,其增加因它们的添加而减弱.
- 随着MS含量 (0-55.1%),RDME线性增加,表明在盐作用下弹性得到改善.
- MS和玄武岩纤维降低了机械强度减弱,改变了水化产品和元素组成 (Mn,Mg,Fe).
结论:
- 渣和玄武岩纤维显著提高了混凝土对盐引起的降解的抵抗力.
- 这些添加剂减轻了质量损失并保持了机械性能,使MS-HPC成为一个有前途的耐用建筑材料.
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