同济大学学报（自然科学版）2012，Vol.40Issue(7)：1051-1057,7.DOI:10.3969/j.issn.0253-374x.2012.07.016
模型再生混凝土二维Cl-扩散细观数值模拟
Meso-level Numerical Simulation on Twodimensional Chloride Diffusion in Modeled Recycled Aggregate Concrete
摘要
Abstract
According to the chloride diffusivity and geometric parameter of the five-phase recycled aggregate concrete (RAC), the chloride diffusion characteristics in modeled RAC is numerically simulated. The effect of relevant parameters such as the replacement ratio of recycled coarse aggregate, the diffusivity of new and old hardened cement mortar and the interfacial transition zones as well as the thickness of old hardened cement mortar on the diffusion properties of RAC is analyzed comparatively. The results obtained from the numerical simulation indicate that the distribution of chloride concentration is non-uniform within the modeled RAC;and the chloride concentration in RAC declines wavelike along the diffusion depth. Furthermore, the influence of recycled coarse aggregate replacement ratio, cement mortar, ITZ, etc., on the chloride concentration increases distinctly with the depth, and more obvious at the ITZ.关键词
模型再生混凝土/细微观/氯离子(Cl-)扩散/数值模拟Key words
modeled recycled aggregate concrete/mesolevel/Cl- diffusion/numerical simulation分类
建筑与水利引用本文复制引用
肖建庄,应教伟..模型再生混凝土二维Cl-扩散细观数值模拟[J].同济大学学报（自然科学版）,2012,40(7):1051-1057,7.基金项目
国家自然科学基金(51178340) （51178340）
上海市科委项目(10231202000) （10231202000）
