摘要
通过宏观和微观两方面研究C60自密实混凝土抗冻性。宏观研究表明C60自密实混凝土不能经受300次快速冻融循环,需掺入引气剂以保证其抗冻耐久性,自密实混凝土抗冻性能与高强混凝土类似,冻融破坏的主要因素是在冻融过程中温度变化而产生的疲劳应力所造成。微观研究表明C60自密实混凝土的相对耐久性指数与混凝土含气量、气泡间隔系数及微观孔径分布存在一定关系。
Frost-resistance of self-compacting concrete of C60 has been studied from both of macro and micro respects. The macro-study results indicate that the frost-resistance of self-compacting concrete of C60 does not reach 300 cycles of freezing and thawing, it can be mixed with air entraining agent to ensure its frost-resistance. Frost-resistance of self-compacting concrete is similar to high strength concrete with freezethaw damage, which a major factor is the fatigue stress on temperature changes The micro-study results indicate that concrete air content, bubble spacing factor; had a relationship with the durability index of self-compacting concrete of C60. during freezing and thawing. micro-pore size distribution
出处
《建筑技术》
北大核心
2011年第5期443-445,共3页
Architecture Technology
关键词
自密实混凝土
抗冻性
宏观研究
微观研究
self-compacting concrete
frost-resistance
macro-study
micro-study
