界面离子吸附特性及其对C-S-H成核、生长和粘结的影响机理研究

水化硅酸钙（C-S-H）在不同集料、石粉和纤维界面处的生长和粘结性能差异显著，而C-S-H在界面处的生长和粘结特性，是决定界面区性能的关键。明确界面特性对C-S-H成核、生长和粘结的影响机理对界面区性能的改善意义重大。本项目将以水泥浆体孔隙溶液中的离子在界面的吸附为突破口，首先通过在纳米尺度分析离子在界面的吸附规律，进而明确界面对离子的吸附作用力。在此基础上，通过在纳/微米尺度探究离子吸附作用对C-S-H成核、生长以及粘结的影响规律，建立离子在界面吸附与C-S-H在界面的成核、生长和粘结之间的关系，进而阐明界面对C-S-H成核和生长的影响机制，揭示界面与C-S-H的粘结机理。研究成果将为实现调控C-S-H在界面的生长和粘结从而优化界面区性能提供理论指导；也为集料、石粉和纤维表面性能的评估和优化提供理论基础与技术支持。

The growth and adhesion properties of C-S-H at the surface of different aggregates, stone powders and fibers are significantly different. As the formation and adhesion of C-S-H at the interface is the key to determine the interface property, it is of great significance to clarify the mechanism for the influence of the surface properties on the nucleation, growth and adhesion of C-S-H. The adsorption of ions in the pore solution of cement paste at the interface is the key of this study. Initially, the adsorption of ions at the interface is investigated at the nano scale to clarify the adsorption force. Then, the influence of ion adsorption on the nucleation, growth and adhesion of C-S-H is studied at the nano/micro scale to establish the relationship between ion adsorption and the nucleation, growth and adhesion of C-S-H. With this relationship, the mechanism for the influence of the interface features on C-S-H nucleation and growth is illustrated, and the adhesion mechanism between the interface and C-S-H is clarified. The results will provide theoretical guidance for adjusting the growth and adhesion of C-S-H to optimize the interface properties. Meanwhile, it may also supply theoretical and technical support for evaluating and optimizing the surface properties of aggregate, stone powder and fiber.