用修改过的环氧复合材料涂层提高混凝土的盐耐久性
Lu Cong1, Yanchao Wang2, Xuekai Gao2
1Department of Civil Engineering, Shanxi University, Taiyuan 030006, China.
Materials (Basel, Switzerland)
|February 26, 2025
概括
一种新的改性环氧复合材料涂层 (MECC) 为混凝土结构提供了对化物和冷解周期的优越保护. 这种耐用的涂层显著提高了盐的抗性,并延长了混凝土的使用寿命.
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.
- 腐蚀科学 腐蚀科学
背景情况:
- 传统的环氧树脂保护剂在增强混凝土结构耐用性方面存在局限性.
- 化物暴露和冷解周期是混凝土退化的主要原因,导致裂,剥离和裂纹.
- 需要先进的防护涂层来提高混凝土基础设施的寿命.
研究的目的:
- 提出和评估改性环氧复合材料涂层 (MECC) 作为混凝土结构的先进保护处理.
- 评估MECC在增强对化物入侵和盐伤害的耐药性方面的有效性.
- 为了比较MECC与传统环氧树脂涂层 (EC) 和酸盐涂层 (SC) 的性能.
主要方法:
- MECC使用环氧树脂,二甲基碳酸盐溶剂和复合固化剂 (改性胺和聚氨) 制定.
- 在经过MECC处理的混凝土样本上进行了盐耐寒性测试,这些样本经过冷解周期.
- 性能评估包括测量吸水率,相对动态弹性模量 (RDEM) 和质量损失.
- 在长时间暴露于10.0%的NaCl溶液后,对化物耐药性进行了评估.
主要成果:
- 与未涂层的标本相比,MECC标本的吸水率显著降低,盐抗性提高.
- 在经过200次冷解周期后,MECC处理的混凝土的相对动态弹性模量高出21.62%,而非涂层样本的质量损失仅为19.14%.
- 经过120天的10.0%NaCl侵蚀,MECC有效地防止了环境液体和离子的入.
- 在耐久性测试中,MECC的性能优于普通环氧树脂涂层 (EC) 和酸盐涂层 (SC).
结论:
- 改性环氧复合材料涂层 (MECC) 为保护混凝土结构提供了耐用和有效的解决方案.
- MECC处理改善了混凝土的内部结构,加密了表面,并防止了环境的透.
- 增强的耐用性归因于化物引起的损伤减少和融条件下的内部结冰压力,从而延长了混凝土的使用寿命.
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