水泥基材料氧气扩散系数测定

Determination method and testing device of oxygen diffusion coefficient of cement-based material

介绍了一种基于Fick扩散定律测定水泥基材料氧气扩散系数的方法及装置。该装置包括供气系统、试件、左右气体腔室、传感测试系统、数据采集系统。该装置密封性好,操作简便,数据真实可靠,且试验过程中氧气扩散的驱动力仅为浓度梯度,可真正测出氧气在水泥基材料试件中的扩散系数,适用于不同孔隙率的水泥基材料氧气扩散系数的测定并为进一步研究氧气对水泥基材料中的钢筋锈蚀研究提供数据基础。

The method and testing device for determining the oxygen diffusion coefficient of cement-based material based on Fick diffusion law are introduced.This device includes an air supply system,testing piece,left and right gas chamber,sensing test system and data acquisition system.This device has good sealing performance,convenient operation and reliable data.The driving force of oxygen diffusion in the experiment is only the concentration gradient,which can measure the oxygen diffusion coefficient in the cement-based material.It is suitable for determining the oxygen diffusion coefficient of cement-based material with the different porosity,providing a data basis for the further study of oxygen corrosion of reinforcement in cementbased material.