Gao Yu, Liu Yingying, Wang Guanqi, Liu Jiale, Cao Zijian, Yong Qiwen, Zhao Hongwei
School of Material Science and Engineering, Hunan University of Science and Technology, Xiangtan 411201, China.
College of Chemistry and Chemical Engineering, China West Normal University, Nanchong 637009, China.
Materials (Basel). 2025 Jun 5;18(11):2662. doi: 10.3390/ma18112662.
In contemporary construction practices, polycarboxylate superplasticizers (PCEs) have gained extensive utilization in concrete formulation owing to their exceptional dispersive properties and superior water reduction capabilities. Nevertheless, these admixtures demonstrate pronounced susceptibility to clay contamination, a critical limitation that substantially constrains their practical implementation. To mitigate this detrimental effect, multiple technical strategies have been developed to suppress clay sensitivity, with predominant approaches focusing on molecular structure optimization and incorporation of supplementary admixtures. This review systematically investigates the competitive adsorption mechanisms operating at the cement-clay interface. Through rigorous analysis of molecular architecture characteristics and synergistic admixture combinations, we comprehensively review current methodologies for enhancing the clay resistance of PCE-based systems. Furthermore, this paper proposes prospective directions for synthesizing clay-tolerant PCE derivatives, emphasizing molecular design principles and advanced formulation protocols that may inform future research trajectories in construction materials science.
在当代建筑实践中，聚羧酸系高效减水剂（PCEs）因其卓越的分散性能和出色的减水能力，在混凝土配方中得到了广泛应用。然而，这些外加剂对粘土污染表现出明显的敏感性，这一关键限制极大地制约了它们的实际应用。为减轻这种不利影响，已开发出多种技术策略来抑制粘土敏感性，主要方法集中在分子结构优化和掺入辅助外加剂。本综述系统地研究了在水泥 - 粘土界面起作用的竞争吸附机制。通过对分子结构特征和协同外加剂组合的严格分析，我们全面回顾了当前提高基于PCE体系抗粘土性能的方法。此外，本文提出了合成耐粘土PCE衍生物的未来方向，强调了分子设计原则和先进配方方案，这些可能为建筑材料科学未来的研究轨迹提供参考。
