泡沫水泥-粉煤灰材料的强度及其电化学特性

基于水泥基材料的电化学体系,研究了冻融条件下不同粉煤灰掺量对泡沫轻质水泥基材料的无侧限抗压强度与电化学参数的影响规律,建立相应的等效电路模型,分析表明：随着粉煤灰掺量的增加,造成胶体之间产生“滑移”现象,使得材料抗压强度不断降低;Nyquist图由高频段与中频段两个时间常数及低频区的扩散阻抗组成,相应的等效电路模型中的Q和Cd不断减小,Rt、W、Rl与Rs不断增大;泡沫轻质水泥-粉煤灰材料的强度与电化学元件参数间为指数关系。

Study on strength and electrochemical characteristics of lightweight cement flyash materials (FCF)

Based on the electrochemical system of cement based materials, the effects of different fly ash content on the unconfined compressive strength and electrochemical parameters of the lightweight cement based materials under freeze-thaw conditions were studied, and the corresponding equivalent circuit models were established. The analysis showed that with the addition of fly ash, the "slippage" phenomenon between the colloids was caused, and the compressive strength of the materials decreased.; Nyquist diagram is composed of two time constants in high frequency band and medium frequency band and diffusion impedance in low frequency band. The corresponding Q and Cd of the equivalent circuit model decrease continuously, and the Rt, W, Rl and Rs increase continuously.