摘要
研究了不同水灰比与骨料体积含量的混凝土在氯离子侵蚀、冻融循环与氯离子侵蚀复合条件下的相对动弹性模量、耐久性指数、混凝土外观质量与开裂情况。试验结果表明:冻融循环促进了氯离子在混凝土中的渗透、扩散,使混凝土中的氯离子含量增加,而水灰比大、骨料体积含量小的混凝土受此影响较大,冻融循环与氯离子侵蚀之间存在耦合叠加效应,这对于北方寒冷地区存在氯离子侵蚀环境的钢筋混凝土结构提供了试验和理论参考。
The interaction between fleeing-thawing and chloride penetration was experimented.Two sets of specimens consideing different water-cement ratios and different aggregate volume fractions were tested.The test results show that fleeing-thawing can accelerate the chloride diffusion and penetration and increase chloride ion degree in concrete.The concrete with larger water-cement ratio and lower aggregate volume fractions was much more influenced by fleeing-thawing and chloride penetration.The coupled effect of chloride penetration and freeing-thawing acclerated concrete damage.The test results were researched by theory.The experiment results and the theorical analysis provided basis for structures of RC in cold area induced by chloride ion.
出处
《混凝土》
CAS
CSCD
北大核心
2008年第11期29-31,共3页
Concrete
基金
江苏省教育厅基金项目(05KJD560217)
关键词
冻融循环
氯离子
耦合效应
试验
freezing-thawing cycles
chloride ion
coupled effect
experiment
