铜渣粉-水泥复合胶凝体系的水化热及动力学研究

采用等温量热法，分别测定了铜渣粉磨时间为30、60min，掺量为0%、20%、30%和40%的铜渣粉水泥复合胶凝体系的水化放热速率和放热量，分析了铜渣粉细度和掺量对复合胶凝体系水化反应历程的影响，并且基于Kstulovic Dabic模型计算得到了水化动力学参数.结果表明：铜渣粉推迟了复合胶凝体系的诱导期结束时间、加速期开始时间以及第2放热峰出现时间，降低了复合胶凝体系水化放热量及水化速率；水化12h前，铜渣粉对复合胶凝体系水化热呈抑制作用；水化12h后，铜渣粉活性逐渐被激发，水化速率加快；铜渣粉水泥复合胶凝体系的水化反应经历结晶成核与晶体生长相边界反应扩散作用（NG I D）过程，由Kstulovic Dabic水化动力学模型计算得到的铜渣粉水泥复合胶凝体系水化反应速率曲线，能够较好地分段模拟由量热试验得到的水化速率曲线；复合胶凝体系的结晶成核与晶体生长（NG）过程随铜渣粉掺量的增加和细度的降低而延长，相边界反应（I）过程随铜渣粉掺量的增加而缩短.

Hydration Heat and Kinetics of Copper Slag Powder Cement Composite Cementitious System

The hydration heat release rate and total hydration heat of copper slag powder cement composite cementitious systems containing different copper slag grinding time of 30min and 60min, and different admixture content of 0%, 20%, 30%, and 40% respectively were determined by isothermal calorimetry test to investigate the different levels of ground granulated copper slag powder and its content on the influence of hydration reaction mechanism of composite cementitious system, and calculate the hydration kinetics parameters based on Kstulovic Dabic model. The results show that copper slag powder delays the end time of induction period, the beginning time of acceleration period and the appearance of the second heat release peak, and reduces the heat release and hydration rate of composite cementitious system. Before hydration for 12h, copper slag powder inhibites and slows down the hydration heat of the composite cementitious system. After hydration for 12h, the activity of copper slag powder is gradually activated and the hydration rate is accelerated. The hydration reaction of the copper slag powder cement composite cementitious system undergoes the process of nucleation and crystal growth interactions at phase boundaries diffusion(NG I D). The hydration reaction rate curve of the copper slag powder cement composite cementitious system calculated by the hydration kinetics model of Kstulovic Dabic can well simulate the hydration rate curve obtained from the calorimetry test in sections. The crystallization and nucleation and crystal growth process(NG) of the composite cementitious system are prolonged with the increase of the content of copper slag powder and the decrease of the fineness, while the phase boundary changing reaction process(I) is shortened with the increase of the content of copper slag powder.