水泥基材料在未来相当长时期仍将是建筑和土木工程最主要的结构材料。在进一步提高耐久性以满足海洋和西部等严酷环境使用要求的同时，节能降耗、回归自然等新理念对清水、艺术混凝土的需求也不断增长，因此集高耐久性与优良外观美学性能于一体的“结构-功能一体化”水泥基材料将是未来发展的重要方向。本项目创新性提出运用微生物矿化技术，在混凝土表层毫米至厘米厚度范围的孔隙中形成矿化产物，获得高致密结构，提高耐久性。同时，将严重影响外观性能的、一直未能彻底解决的泛碱顽疾，通过微生物矿化将泛碱物质转化为难溶矿物且致密表层结构阻止其迁移，大幅降低泛碱程度和概率。其中，微生物矿化与传输的交互作用机理和耦合微生物矿化的水泥基材料微观结构演化的定量预测，是调控矿化层厚度和程度、制备上述梯度功能性材料的关键科学问题和技术基础。课题组具备生物矿化和水泥基材料科学双方面的良好研究基础，并通过前期试验验证了可行性。

Cement-based materials will still be main structural materials for building and infrastructures.Not only severe environment (like marine and western area) possesses high requirements for durability, energy-saving and nature life style also requires more artistic concrete. Therefore, it is future trend to combine high durability and high appearance together.In this project, it is proposed to densify suface layer from millimeter to centimeter using bio-mineralization, and then to improve durability. At same time, biomineralization transfers alkaline substances to minerals and reduces their transportation to surface, to further modify appearance. To achieve above aim, we should explore the interaction mechanism between bio-mineralization and transport during the formation of gradient microstructure, to predict quantitatively the evolution of gradient microstructure coupling bio-mineralization and cement hydration. The feasibility has been roughly proved through previous experiments.