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测定了不同水泥的水化放热和电阻率变化,并做了电阻率变化率和放热速率的对比分析。研究发现:水泥水化1d的电阻率随累计放热量的增加而增加;电阻率与放热速率随水化时间的变化均能独立地反映水泥水化进程;且水泥水化放热速率曲线的一些特征峰,如:溶解热峰、主放热峰、钙钒石转化峰等,在一定时间偏差范围内,均可在电阻率变化曲线上找到与之对应的突变点。水泥水化放热速率在诱导期达到极小值后先快速增长,再慢速增长,存在转折点,且电阻率变化率有相应峰值与其对应。
The hydration exotherm and resistivity of different cement were measured, and the comparative analysis of resistivity and exothermic rate was made. The results show that the resistivity of cement hydration increases with the increase of cumulative heat release, and the resistivity and exothermic rate reflect the hydration process independently with the change of hydration time. The hydration rate of cement hydration Some characteristic peaks, such as: dissolved heat peak, the main exothermic peak, calcium vanadium stone conversion peak, within a certain time deviation, can be found in the resistivity curve of the corresponding mutation point. The hydration rate of cement hydration increased rapidly after reaching the minimum value at the induction period, and then slowly increased. There was a turning point, and the corresponding rate of change of resistivity corresponded with it.