东南大学学报（自然科学版）Issue(6)：1240-1245,6.DOI:10.3969/j.issn.1001-0505.2014.06.026
考虑再生粗骨料随机分布的混凝土氯离子扩散细观数值模拟
Mesoscopic numerical simulation on chloride diffusion in concrete with random distributed recycled coarse aggregate
摘要
Abstract
Concerning the effects of the random distribution of coarse aggregate and the non-linear characteristic of chloride binding on chloride diffusion,the modeling and microscopic simulation analysis for the chloride diffusion characteristics of recycled aggregate concrete (RAC )are carried out.The simulation results are compared with the test results.Then,the chloride diffusion character-istics with different diffusion coefficients of old mortar,new mortar and old interfacial transition zone (ITZ)and different immersion times are studied.The results indicate that the simulation results and the test results are similar.The distribution of chloride diffusion in RAC declines wavily along the diffusion depth.The chloride diffusion speed accelerates with the increase of the diffusion coeffi-cients and the immersion time.Besides,with the increase of the replacement percentage of recycled coarse aggregate (RCA ),the chloride diffusion speed of RAC increases.At the same diffusion depth,the maximum chloride concentrations in different random RAC models are similar,indicating that the simulation results of the proposed random RAC model has a good stability.关键词
再生混凝土/再生粗骨料/随机分布/氯离子扩散/细观数值模拟Key words
recycled aggregate concrete (RAC)/recycled coarse aggregate (RCA)/random distri-bution/chloride diffusion/mesoscopic numerical simulation分类
建筑与水利引用本文复制引用
肖建庄,卢登,马志鸣..考虑再生粗骨料随机分布的混凝土氯离子扩散细观数值模拟[J].东南大学学报（自然科学版）,2014,(6):1240-1245,6.基金项目
国家自然科学基金资助项目（51325802）． （）
