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在盐环境中的酸盐离子扩散在甲混凝土中的实验研究和数值分析
Lina Zhou1,2, Ying Cai1, Cailong Ma1
1School of Civil Engineering and Architecture, Xinjiang University, Urumqi 830047, China.
Materials (Basel, Switzerland)
|October 14, 2023
概括
层层的双氧化物 (LDHs) 或酸,增强了混凝土对离子透的抵抗力. 观察到2%化酸盐的最佳性能,显著改善了化物环境中的耐用性.
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:
- 酸,也称为多层双氧化物 (LDHs),是一种新兴的添加剂,用于减轻混凝土中钢筋腐蚀.
- 化物引起的腐蚀是混凝土结构过早失效的主要原因,需要有效的保护策略.
研究的目的:
- 调查不同化酸盐 (0%,2%,4%,6%) 含量对C30混凝土中离子扩散的影响.
- 建立和验证化离子扩散模型,用于在化盐暴露下用甲改性混凝土.
主要方法:
- 一维加速离子透测试 (NT-Build 443) 在混凝土样本上进行.
- 在30天和60天浸入化溶液后,分析了离子度概况.
- 用Fick的第二定律来确定化物扩散系数和表面度,并使用COMSOL多物理验证.
主要成果:
- 结合LDH的混凝土保持了其压力强度要求.
- 最佳添加2%的化水泥石显示出对离子透的最佳抵抗力,将30天透系数降低了19.6%.
- 离子扩散过程使用Fick的第二定律准确地建模,COMSOL模拟与实验数据保持一致.
结论:
- 化酸是一种有效的添加剂,可以提高混凝土对离子入的抵抗力.
- 开发的离子扩散模型通过有限元素分析验证,可靠地预测混凝土在暴露下的性能.
- 该研究证实了LDH在提高混凝土结构在恶劣环境中的耐用性和使用寿命方面的潜力.
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