摘要
混凝土的抗碳化性能是混凝土耐久性的重要指标。在海洋潮汐环境下的干湿循环条件直接影响混凝土内部的孔结构,进而影响混凝土的碳化行为。本文模拟海工工程中的海洋潮汐环境,研究不同配合比混凝土在干湿循环条件下的碳化行为,并探究其作用机理。研究结果表明:干湿循环条件加速了混凝土的碳化过程,但粉煤灰和矿粉的掺入可降低干湿循环对混凝土抗碳化性能的影响。
Carbonization resistance is one of the most important index in determining the durability of the concrete.In a tide environment,the wetting-drying cycle directly affect the pore structure of the concrete , which further influence the carbonization process .The paper simulated the tide environment with the purpose of studying the carbonization process of concrete with different mix portion in wetting-drying cycle and its mechanism.the results indicate that wetting-drying cycle accelerates the carbonization process,but flyash and mineral powder may undermine the influence of wetting-drying cycle to the carbonization resistance of the concrete.
出处
《铁道建筑》
北大核心
2014年第1期125-128,共4页
Railway Engineering
关键词
干湿循环
碳化行为
孔结构
矿物掺合料
Wetting-drying cycle
Carbonization
Pore structure
Mineral admixture
