同济大学学报（自然科学版）2018，Vol.46Issue(5)：588-592,5.DOI:10.11908/j.issn.0253-374x.2018.05.004
硫酸盐在圆形混凝土桩中扩散反应解析解
Analytical Solution for Sulfate Diffusion Reaction in Circular Concrete Piles
摘要
Abstract
Based on the Fick's second law,a diffusion reaction equation of sulfate in concrete piles was established.With the method of separation of variables and Danckwerts,according to initial conditions and boundary conditions,the diffusion reaction equation was deduced.Furthermore,considering the effect of pore filling and crack on diffusion coefficient,an effective diffusion coefficient model was proposed to show the variation of the diffusion coefficient during the degradation process of concrete piles.Sulfate concentration profiles were obtained by the solution and the effective diffusion coefficient model,which agrees well with the experiment data to verify the validity of the proposed analytical solution.Case study shows that the inhibition effect of pore filling on sulfate diffusion is remarkable.The development of the crack promotes the diffusion reaction of sulfate.With water-cement ratio decreasing,the invasion depth of sulfate decreases,as well as the concentration of sulfate in concrete piles.关键词
混凝土桩/硫酸盐/扩散反应/裂缝/孔隙填充Key words
concrete pile/sulfate/diffusion reaction/crack/pore filling分类
建筑与水利引用本文复制引用
李镜培,姚明博..硫酸盐在圆形混凝土桩中扩散反应解析解[J].同济大学学报（自然科学版）,2018,46(5):588-592,5.基金项目
国家自然科学基金(41772290) （41772290）
