Research on synergistic optimization of preparation of polycarboxylate superplasticizer

Abstract

Abstract To optimize the preparation process of the PCEs, this paper studied the synergistic effect of the three parameters of initiator dosage, synthesis temperature and synthesis time on the viscosity and the performance of the PCEs. The results showed:(1) For the viscosity of the PCEs, when the synthesis temperature was high, the viscosity could be improved by reducing the initiator dosage or by extending the synthesis time; When the synthesis temperature was low, the viscosity could be improved by increasing the amount of initiator dosage or shortening the synthesis time appropriately. At the same time, these three parameters had a similar synergistic relationship with the performance of the PCEs (2) Through kinetic factors, establish a process model of these three parameters and the viscosity of the PCEs: η = 2.97 * e R T 100 * t * m − 1 2 . The model provided a theoretical basis for the optimization of the preparation process of the PCEs. (3) When the viscosity of the PCEs was in the range of 200-370 mPa*s, its effect on cement dispersibility was better.