摘要
研究了各种加速试验条件和实际自然环境下混凝土中钢筋锈蚀量的分布规律.结果表明:氯盐外侵试件在锈胀开裂前锈蚀量分布在面向保护层一侧,呈半椭圆形分布.锈胀开裂后向内部发展,在背向保护层一侧的锈蚀量近似为均匀分布.在面向保护层一侧锈蚀程度相当的情况下,内掺氯盐试件背向保护层一侧的锈蚀量大于氯盐外侵试件.人工气候环境下钢筋锈蚀层的分布特征与自然环境下的相同,是一种比较理想的加速试验方法.外通直流电法的锈蚀比较均匀地分布在整个钢筋表面,与实际自然情况不符.
The corrosion of concrete reinforcing bars in concrete was studied by corrosion tes- ting in artificial and natural conditions. Before the onset of corrosion cracking under natural cli- matic conditions corrosion is mainly distributed on the bar side facing the concrete cover. Maxi-mum corrosion is noted on the point nearest the concrete cover and corrosion is less on way from the concrete cover. The corrosion is distributed as a half ellipse around the the maximum toward the cover. Re-bar corrosion in the artificial climatic tests shows pattern. However, re-bar corrosion induced by the galvanostatic method is seen to be points a bar with a similar differentfrom that observed under natural climatic conditions.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2012年第3期355-360,共6页
Journal of China University of Mining & Technology
基金
国家自然科学基金项目(51178455)
关键词
自然环境
人工气候环境
外通直流电
锈蚀特征
锈胀开裂
natural climate environment
artificial climate environment
galvanostatic method
corrosion characteristics of reinforcing bar
cracking
