| 摘要: |
| 研究了应力对混凝土气渗系数和CO2扩散系数的影响，建立了气渗系数与CO2扩散系数的相关性．以Fick第一定律推导的碳化深度模型为基础，建立了基于气渗系数的应力作用下混凝土碳化深度预测模型——CDep GPL模型，并对模型进行了验证．结果表明：混凝土碳化深度的模型预测值与试验值吻合较好，该模型可用于预测应力作用下混凝土的碳化深度. |
| 关键词: 混凝土碳化 气渗系数 CO2扩散系数 碳化深度 CDep GPL模型 |
| DOI：103969/j.issn1007 9629202002010 |
| 分类号: |
| 基金项目:国家自然科学基金国际合作项目（51320105016） |
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| Prediction Model of Concrete Carbonation Depth under the Combined Actions of Stress |
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TANG Guanbao1, YAO Yan2, WANG Ling2, CAO Yin2, CUI Suping1
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1.College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China;2.State Key Laboratory of Green Building Materials, China Building Materials Academy, Beijing 100024, China
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| Abstract: |
| The gas permeability coefficient and CO2 diffusion coefficient of concrete under load were investigated and the relationship between the aforementioned two parameters was established. Further, on the basis of the carbonation model based on Ficks first law of diffusion, a new prediction model of concrete carbonation depth using the gas permeability coefficient as the characteristic parameter was proposed and verified, and it was named CDep GPL. The results show good consistency between the calculated values and the tested ones. The CDep GPL model can be used to predict the carbonation depth of concrete under load. |
| Key words: concrete carbonation gas permeability coefficient CO2 diffusion coefficient carbonation depth CDep GPL model |
