模拟盐雾氯离子在混凝土中的沉积特性研究

Research of the Deposition Characteristic for Simulated Salt Chloride Ion in Concrete Materials

调查了滨海盐雾区基本的环境参数,通过综合盐雾腐蚀箱来模拟盐雾环境,采用不同配合比的混凝土试样,研究了盐雾氯离子在混凝土中的沉积特性,研究表明水灰比对氯离子在混凝土表面的沉积有很大的影响,随着水灰比的增大,氯离子的表面沉积量也增大,实验中,引入环境系数的概念,提出经过修正的Fick第二定律,推导出修正后的解析解,结果显示在实验室环境下,当环境系数取1.3时,修正的Fick第二定律和实测数据符合得很好。

In this paper,the survey of basic environmental parameters at coastal salt-fog zone is applied.Using simulating salt environment,the deposition properties of the chloride ion in concrete are researched with different mixture ratio of concrete specimens.Research results show that water-cement ratio of concrete has a great impact to the chloride ion in the deposition of the concrete surface;with the water-cement ratio increasing,the amount of chloride ions,which deposited on the concrete surface,are also increases.In the experiment,the concept of environmental factors is introduced.A modified Fick＇s second law is derived and an analytical solution is obtained.The experimental results show that in the simulating environment,while the environmental factor equals to 1.3,the Fick＇s second law and the experimental data matches very well.