应用小电极交流阻抗谱方法，对大混凝土试件的不同端面、不同方向和不同位置进行交流阻抗谱测定，从而得到整个试件微结构的区域分布．应用平行毛细管束模型，可以求出相应微结构参数的区域分布
The local microstructure of large concrete specimen was determined by using AC impedance techniques.A pair of small electrodes were used at different location of a large concrete specimen to measure Nyquist plot of AC impedance spectroscopy.The result was Randles' type which was used to obtain the porosity,the characteristics of capillary structure and the diffusion behavior of the specimen at different location.
