纳米改性水泥基材料技术与自密实混凝土技术的结合，是先进水泥基复合材料领域的前沿课题，但目前纳米改性自密实混凝土的流变特征及硬化性能的理论研究及机理分析仍存在极大空白。本项目基于对不同性质纳米材料在水泥基材料中的分散机理及分散关键技术的研究，阐明不同纳米材料对自密实水泥基复合材料体系流变性能影响的机理性问题，建立浆体流变特征参数与混凝土宏观工作性能间的逻辑关联；同时，研究纳米材料复合自密实混凝土体系的微观形貌及微观结构形成机理，分析纳米材料对硬化水泥浆体及浆体与骨料间界面特性的影响；基于纳米材料对混凝土微观改性机理的研究，揭示纳米材料对混凝土宏观力学性能的强化机制；推荐基于流变参数及硬化性能的纳米自密实混凝土的性能平衡优化设计。本项目的创新性研究成果对丰富和发展纳米高性能水泥基复合材料的基本理论，推动综合性能优异的纳米自密实混凝土在重大工程中的应用具有重要的理论意义和实用价值。

The combination of nano-modified cement-based materials and self-consolidating concrete (SCC) technology, is a frontier research topic in the field of advanced cement based composite materials, however the research on the rheology, hardened properties and mechanism of nano-composite SCC still remain a great gap. Based on the study of the dispersed key technology and mechanism of various nano materials in cement-based materials, this project is to clarify the mechanism of different nano materials on the rheological properties of self-consolidating cement-based composites, establish the logical relationship between the rheological parameters of the paste and the workability performance of the concrete. In the meantime, the microstructure formation mechanism of nano composite SCC is to be investigated, the effect of nano materials on the interfacial characteristics between hardened cement paste and aggregate is to be analyzed. And the improvement mechanism of nano materials on mechanical properties of SCC is to be revealed on the basis of the research on reinforced mechanism of nano materials in concrete. Furthermore, performance-based optimal design is also to be recommended based on the balance between rheology and hardened properties of nano SCC. The innovation on basic theory of this research has important theoretical significance and practical value on the enrichment and development of nano materials composite high-performance concrete materials and the promotion in engineering application in the excellent comprehensive properties of modified nano materials SCC.