海水拌养混凝土技术是实现海洋地材资源化，加速海洋离岸工程建设的重要途径。然而，海水中多盐-温度耦合作用下的水化机理却不明确。本项目将率先运用数字化全息显微技术，纳米尺度上实时、原位监测胶凝材料纳米尺度上的三维形貌变化，定量表征固-液界面溶解速率的分布，揭示多盐-温度交互作用下胶凝体系水化产物生长的时变规律，建立基于胶凝材料非匀质溶解的水化动力学模型。探明微结构的形成与演变过程，建立基于热动力学的3D微结构演化模型。进而，从源头上阐明多盐-温度耦合作用下胶凝材料的水化机理和微结构演变机制，为优化海水拌养混凝土的长期服役性能提供重要的理论依据。

Seawater mixing concrete technology is one very important way to accelerate the construction of offshore projects and realize the marine resources utilization. Yet the hydration mechanism of cementitious materials under the coupling of multiple inorganic salts contained in seawater and the wide span of temperature still remains unclear. This project will be the first time to apply Digital Holographic Microscopy on characterizing the 3D topography at the solid-solution interface on nano-scale in real time and in situ. The solid-solution interface dissolution rate distribution will be quantitatively characterized, the time dependent growth of hydration products will be revealed under the coupling effect of multiple salts and temperature. Based on the heterogeneous dissolution behavior, the hydration kinetic model will be developed. The microstructure will also be investigated, based on which the 3D thermodynamic microstructure model will be established. Therefore, the hydration mechanism and microstructure development of cementitious materials under the coupling of multiple salts and temperature will be revealed essentially. This study will provide the theoretical support for the optimization of seawater mixing concrete durability in the future.