摘要
根据人工气候环境下的混凝土侵蚀试验测得的混凝土氯离子浓度,基于Fick第二定律,分别计算了侵蚀40、80、120、160、200 d后的混凝土氯离子扩散系数,证实了氯离子扩散系数随侵蚀时间增大而减小;引入混凝土氯离子扩散系数衰减速率的概念,并分析计算得到了不同侵蚀时间的氯离子扩散系数衰减速率及其与时间的关系模型。计算结果表明:在人工气候环境下,随侵蚀时间的延长,混凝土氯离子扩散系数衰减速率相应减小。
According to the chloride ion concentration in corrosion test concrete under designed artificial climate environment, the chloride diffusivity in test concrete after 40,80,120,160,200 d were fitted and calculated on the basis of the Fick＇s second law.The results proved that the chloride diffusivity was decrease along with the increase of corrosion time.The concept of the attenuation rate of chloride diffusivity was introduced, and the attenuation rate of chloride diffusivity of different corrosion time was calculated.Also, a time variation model of attenuation rate of chloride diffusivity was established.The results showed that attenuation rate of chloride diffusivity of concrete under artificial climate reduced along with the increase of corrosion time.
出处
《混凝土》
CAS
CSCD
北大核心
2013年第3期26-28,共3页
Concrete
基金
国家自然科学基金项目(50879079
51279181)
水利部公益性行业科研专项经费项目(200901065)
关键词
人工气候
混凝土
氯离子
扩散系数
衰减
artificial climate
concrete
chloride ion
diffusion coefficient
attenuation
