地方气候环境下氯离子扩散系数的研究

Research of chlorides diffusion coefficient in local climate

介绍氯离子对混凝土耐久性的影响及氯离子扩散模型,分析混凝土中氯离子来源、氯离子扩散机理,指出了确定氯离子扩散系数时所遇到的问题.结合地方气候环境,建立水灰比、温度、湿度、时间对扩散系数影响的四维扩散系数模型,并将四维模型改进为有利于工程应用的二维模型,通过实例说明模型的有效性.

The influence of chlorides on the concrete durability and the chlorine ion diffusion model is introduced, the source of chlorides and the mechanism of diffusion in concrete is analyzed,while the problem of ascertainning chlorides diffusion coefficient is pointed out. according to local climate,building up four-dimensional coefficient model affected by waterash ratio, temperature, degree of humidity, time. Improving the four-dimensional coefficient model as the two-dimensional model which is advantageous to an engineering application, availability of model is testified by examples.