摘要
在对C50泵送混凝土孔隙特征和氯离子渗透特征的试验基础上,研究了孔隙分形维数与氯离子渗透的关系。研究表明,用孔50~550 nm孔径分形维数能够很好地反映泵送混凝土的氯离子渗透特征。随着孔隙的分形维数增大,凝胶孔增多,混凝土氯离子扩散系数显著降低。矿渣粉煤灰双掺的C50泵送混凝土总孔隙率最小,氯离子扩散系数最小,粉煤灰混凝土总孔隙率最大,分形维数最小,氯离子扩散系数最大。
Based on test of pore fractal characteristics and chloride infiltration of C50 pumped concrete,the relationship between pore fractal di-mension was studied.The results showed that,pore fractal dimension have a good relation with chloride infiltration in 50nm^550nm area.The gel pore amount increase and chloride infiltration reduced with pore fractal dimension.The porosity and chloride diffusion coefficient of C50 pumped concrete is least with composite of slag powder and fly ash,and fractal dimension is biggest.But,Fly ash concrete have least fractal dimension, largest permeability and pore amount.
出处
《混凝土》
CAS
CSCD
北大核心
2010年第4期92-95,共4页
Concrete
基金
国家重点基础研究发展计划项目(973)资助(2009CB623106-3-2)
关键词
泵送混凝土
分形
掺合料
氯离子渗透
孔隙
pumped concrete
fractal
admixtures
chloride infiltration
pore
