抄録
Dynamics of free water in cement have not been studied enough, although it should be important to understand the mechanism of the consolidation process. The water/cement (W/C) ratio and curing time dependences of dynamical structure of free water were bound by time domain reflectometry measurements as follows; (1)Lower W/C ratio brought about larger relaxation time τ and smaller Cole-Cole exponent parameter β values. (2)Amount of free water decreased during the hydration reaction for various W/C ratios. (3)Higher water/cement ratio offered more amount of water in C-S-H gel. (4)The curing rate became sluggish with increasing W/C ratio. These results of free water behaviors observed in the cement hydration process are also useful to consider possible new evaluation systems for the qualities of cement paste, mortal, concrete, and so on.
