水泥基材料成核剂研究进展

Research Progress on Nucleating Agent for Cement-Based Materials

建筑工业化的不断推进需要混凝土的强度尽早、尽快形成。相较于传统的蒸汽或蒸压养护,在水泥基材料中加入一定的成核剂,除了能够有效促进水化、加速凝结外,还有助于改善界面结构和提高耐久性,因而被广泛用于实际工程中,受到了国内外学者的极大关注。本文对比归纳了无机盐类成核剂、有机物类成核剂、纳米成核剂和复合成核剂的成核作用机理,详细分析了成核行为的热力学与动力学特性,概括总结了成核效应的影响因素以及对水泥基材料性能的综合影响。最后探讨了成核剂发展面临的挑战,并对需进一步研究的可能方向提出了建议,旨在为水泥基材料成核剂的高效利用与深入研究提供借鉴与参考。

The boom of building industrialization requires the strength formation of concrete as soon as possible.Compared with steam curing or autoclaved maintenance,nucleating agent in cement-based materials can not only effectively promote the hydration and hardening process,but also help to modify the interface structure and improve the durability.Therefore,nucleating agent is widely used in practical engineering and has attracted great attention.This review offered a retrospection of research efforts on the nucleation mechanism of different nucleating agents,namely inorganic salt nucleating agents,organic matter nucleating agents,nanomaterial nucleating agents and compound nucleating reagents.The thermodynamics and kinetics characteristics of nucleation behavior were analyzed in detail.Then the influences of temperature,dosage and particle size on the nucleation were discussed.Subsequently,the effect of nucleation on the properties of cement-based materials were summarized.Finally,the challenges of nucleating agent development and the possible direction of further research were proposed.The purpose of this study is to provide reference for the efficient utilization and in-depth study of nucleating agents.