自密实混凝土因其绿色施工和良好的力学、耐久性能，在世界范围内广泛使用。但其较高胶凝材料用量导致较高碳排放。低胶凝材料含量生态自密实混凝土（Eco-SCC）设计与制备是高性能水泥基复合材料领域重要研究及发展方向。本项目基于对多元微粉体系颗粒堆积复杂机理问题的研究，建立考虑颗粒间相互作用效应和微粉体系压实效应的高适应性、高精度CPM（可压缩堆积）修正模型；在阐述多元粉体颗粒体系中物理、化学密实效应基础上，将修正模型数学解析与材料设计相结合；同时，在研究基于CPM的Eco-SCC流变性能的前提下，针对基于强度及抗渗性双指标的材料设计方法进行研究，建立胶凝材料活性与强度、抗渗性关联模型，利用模型在早期对Eco-SCC长期强度和抗渗性进行准确预测。基于上述研究，形成低胶凝材料生态自密实水泥基复合材料设计理论及关键技术。研究具有广泛的理论价值及巨大的工程实用性，对于SCC设计规范修订具有重要学术价值。

Self-Consolidating Concrete (SCC) is worldwide used due to its excellent mechanical and durability properties as well as its ability to produce a green construction product that is cost effective. However, the higher binder content required in the mix proportioning of SCC can lead to higher CO2 emission. The design of ecological SCC (Eco-SCC) is the major development direction of high-performance cement-based composite materials. Based on the investigation of complex packing mechanism of multiple size classes micro-particles, the modified Compressible Packing Model (CPM), including the influences of interaction effects of micro-particles and compaction effects of multi particles system due to inter-particle forces will be established. The modified CPM with high precision can be used for multiple size classes packing calculation. Moreover, based on the study of physical-, chemical-packing and the combined effects of multiple size classes micro-particles, the mathematical results from modified CPM can be used to establish a mix design protocol for Eco-SCC. Furthermore, based on the investigation of rheological properties of CPM-based Eco-SCC, as well as the study of strength-impermeability double performance index-based materials design technologies, the relationships between strength, durability, and activities of cementitious materials can then be established, and the long-term strength and impermeability can be predicted given short-term testing protocol. Based on the proposed investigation, the design principles and key technologies of designing low cement content, ecological self-consolidating cement-based composite materials can be established. The research project has novel theoretical value and practical implication, and will contribute to enhancing design specifications.