砂浆含水率的电学测定方法

Determination of Water Content in Mortar by Electrical Method

关键词:  砂浆  含水率  交流阻抗谱  试样  频率范围  线性关系  等效电路  电学  复平面  变化

Key words:  water content,AC impedance spectra,capacitance in parallel at high frequency range

摘要:

在较宽的频率范围内测量砂浆试样的交流阻抗谱，从等效电路中的高频并联电容与试样之间的线性关系可以得到试样的含水率．当含水率下降时，在复平面图上中频和低频区的半圆分裂，从而可以了解砂浆毛细结构的变化。

Abstract:

By measuring the AC impedance spectra of mortar specimen through a wide range of frequency, linear relationship between the capacitance in parallel in the equivalent circuit at high frequency range and the water content of the mortar specimens can be established. This relationship enables us to know the water content of the specimens. As the water content decreases, the semicircle of the complex plane at the middle and low frequency range will split. It is the result of the change of the capillary structure of the mortar specimen.