关键词: 固井水泥;电导率;水化过程;温度

Abstract: The effect of curing temperature on the electrical conductivity of cement in different water/cement ratio (W/C) was studied.In addition, the relationship of conductivity and paste''s hydration process was also explored.The results indicated that under the same W/C, the conductivity peak of slurry gradually decreases with the increasing of curing temperature (from 4 ℃ to 30 ℃).To analysis the hydration process of cement, the conductivity of slurry filtrate is measured, and the results show that the conductivity of slurry and slurry filtrate also has the same laws in the same condition.Isothermal calorimetry test and scanning electron microscope (SEM) observation are used in our experiments to explore the relationship between conductivity and structure of slurry, and the results show that electrical conductivity is an effective way to study the hydration process and structural changes of cement pastes.

Key words: cement paste;electrical conductivity;hydration process;temperature