水泥水化早中期的交流阻抗研究(Ⅱ)——诱导期到减速期的交流阻抗响应

Study of Cement Hydration in the Early and Middle Periods by AC Impedance Technique(Ⅱ)——Analysis of AC Impedance Response in Induction Acceleratory and Deceleratory Periods

对于水泥水化诱导期、加速期和减速期的交流阻抗响应的拓扑结构进行了研究 .水泥水化过程进入这一时期后均包含着 2个平行的步骤 ,其中一个步骤的速率比另一个步骤快得多 ,这一步骤决定了该时期水泥水化过程的特征 .在诱导期 ,决定步骤可用等效电路中的电感来表示 ;在加速期 ,其决定步骤可在等效电路中表示为负电容 ;到了减速期 ,负电容转变为正电容并逐渐缩小 ,直至进入稳定期 .

The topological structure of the response of AC impedance of the hydration process of cement in the induction, acceleratory and deceleratory periods was discussed. In these periods of cement hydration there exist two parallel steps in which only one is rate determining. In the induction period, that step is represented by the inductance in equivalent circuit while that step in the acceleratory period is described by negative capacitance. In the deceleratory period, the negative capacitance turns to be positive.