The dispersion and influence of graphene oxide modified polycarboxylate superplasticizer in alkaline cement solution

Abstract

The aggregation of graphene oxide (GO) in alkaline solutions is a critical factor that limits its potential application in cement-based materials. In this study, a novel superplasticizer was employed as a dispersant, and the GO@PCE water-reducing agent was synthesized through a dropwise addition method. This synthesis approach not only preserves the water-reducing capabilities of PCE but also enhances the dispersibility of GO in alkaline cement solutions. Furthermore, the synthesis method is straightforward. The results demonstrate that GO@PCE maintains excellent dispersion in saturated calcium hydroxide solution. Furthermore, it was observed that GO@PCE can enhance the workability of cement, accelerate cement hydration, reduce the crystallite size of calcium hydroxide, and effectively increase the compressive strength of cement mortar.