纳米水化硅酸钙的制备及对水泥水化影响的研究进展

Research Progress on Preparation of Nano Calcium Silicate Hydrate and Its Influence on Cement Hydration

随着纳米技术的不断发展,纳米材料逐步开始应用于传统混凝土材料中,以提高混凝土的各项服役性能。纳米水化硅酸钙(纳米C-S-H)是一种新型的早强纳米复合材料,可通过晶核效应加快水泥早期水化速率,显著提高水泥基材料的早期力学性能,从而提高施工效率,满足特殊施工要求。本文系统总结了纳米C-S-H的制备方法,及纳米C-S-H对水泥基材料早期和长期性能的影响规律,探讨了其对于水泥水化过程和水化产物的影响机制,其中重点介绍了采用聚合物分散纳米颗粒制备的C-S-H/PCE(聚羧酸型减水剂,简称PCE)纳米复合材料。

With the continuous development of nanotechnology,nanomaterials are gradually used in traditional concrete materials to improve the various performance of concrete.Nano calcium silicate hydrate(nano C-S-H)is a new type of early strength nanocomposites,it can accelerate the early hydration rate of cement through the seeding effect,and significantly improve the early mechanical properties of cement-based materials,so as to improve the construction efficiency and meet the special construction requirements.In this paper,the preparation methods of nano C-S-H and the influence of nano C-S-H on the early and long-term properties of cement-sbased materials are systematically summarized,the influence mechanism of nano C-S-H on the hydration process and hydration products of cement is discussed,especially the C-S-H/PCE(polycarboxylic acid type water reducer,called PCE)nanocomposites prepared by polymer dispersed nanoparticles are introduced.