摘要
碳化是影响水工混凝土耐久性的重要因素。根据混凝土中CO_2扩散方程与热传导方程的对等性,借助ANSYS有限元软件中热传导模块对水工混凝土碳化过程进行数值模拟。针对工程实际中混凝土内部水灰比存在差异的情况,采用分层法建立数值模型。通过对比碳化深度的数值模拟值与室内快速碳化试验值,证明该数值模型能较好地模拟混凝土中CO_2的扩散过程,可为碳化混凝土的寿命预测提供参考。
Carbonation is an important factor that affects the durability of hydraulic concrete. According to the similarity of CO_2 diffusion equation and heat conduction equation,carbonization process of hydraulic concrete is simulated with the heat conduction module in ANSYS finite element software. A numerical model is established through layered method to solve the problem of different water and cement ratio in concrete. The comparison of experimental results and numerical results of carbonation depth shows that the diffusion process simulated by the numerical model of FEM is basically in accordance with the actual diffusion process of CO_2,which can provide reference for the life prediction of carbonated concrete.
出处
《人民长江》
北大核心
2016年第18期84-87,共4页
Yangtze River
基金
水利部科技推广计划项目"北方寒区渠道防渗抗冻胀技术推广与应用"(TG1507)
2015年辽宁省水利科技指导性计划"辽宁省水工混凝土结构质量控制与耐久性提升技术研究"(20150200)
关键词
碳化
有限元模拟
分层法
水工混凝土
carbonation
FEM simulation
layered method
hydraulic concrete
