ELECTROCHEMICAL RESEARCH ON THE HYDRATION MECHANISM AND PROPERTIES OF CEMENT BASED MATERIAL WITH FLY ASH

摘要

Hydration mechanism and various properties of cement based material with fly ash were studied by electrochemical method. Percolation structure was used to elucidate the mechanism of hydra-tion process of cement with fly ash. An effective method of electrochemistry was proposed to evaluate the activity of fly ash. The relation between charge transfer resistance R_α and compression strength and the relation between high frequency capacitance C_(HF) and water requirement ratio W were established. Durability of concrete and the inhibitory effect of fly ash on the corrosion of rebar in concrete in seawater have been discussed in terms of AC impedance parameters. The effect of fly ash on the stray current has also been discussed.