Effect of In-situ PCE Synthesis by Grinding on Properties of Self-water-reducing Cement
YANG Xu1, ZHANG Haibo1,*, SHI Guangling2,*, HOU Chengyan1, ZHOU Wei1
1 School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, Henan, China 2 School of Chemical and Environment Engineering, Pingdingshan University, Pingdingshan 467000, Henan, China
Abstract: The energy utilization efficiency of cement clinker grinding is less than 60%, with a significant amount of energy being wasted as heat. Additionally, the synthesis of polycarboxylate-based superplasticizers (PCE), widely used in cement concrete, requires energy consumption. In this work, based on the principle of mechanochemical synthesis, PCE monomers were added to the cement clinker grinding process to synthesize PCE using the mechanical and thermal energy generated during grinding. This innovative approach aims to reduce energy consumption in cement and superplasticizer production. The effects of different PCE composition ratios on cement particle size and workability of paste were tested. The state of PCE on the cement surface was characterized using a combination of laser Raman spectroscopy and thermal analysis methods. The results indicate that the PCE raw materials can react and adsorb on the surface of cement particles during the grinding process. Compared to the blank group, under the optimal raw material ratio, the average particle size of self-reducing cement decreased by 21.5% with the same grinding time, the initial workability increased by 110.0%, the compressive strength at 3 curing days improved by 20.3%, the compressive strength at 28 curing days improved by 15.9%, and the cumulative heat release decreased by 17.1%. This research demonstrates that in-situ synthesis of PCE during cement grinding can achieve both grinding assistance and water-reducing effects.
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2025, Vol. 39 
