通过固化方法将每年数以亿方疏浚淤泥转化为土资源使用，意义重大。因富含有机质和污染物且呈酸性，需提高硅酸盐水泥固化用量，致使固化土呈碱性难以二次资源化复垦应用。本项目基于“用废料治理污染，以实现资源再生、环境保护和可持续发展”的系统化解决思路，采用工业废料（副产品）与磷肥为原料制备用于淤泥质土进行植生型固化的磷硅水泥，发展一种淤泥质土植生型固化处理新技术。在磷酸镁水泥研究基础上，开发高效能、施工性能好且与淤泥质土固化耦合相适应的磷硅水泥制备技术；采用分子模拟方法揭示磷硅水泥固封污染物的科学机理；通过纳/微观结构测试与化学表征，阐释磷硅水泥固化淤泥质土的物理与化学机制；基于微观孔隙力学理论，建立多尺度固化模型和渗流模型，以此构建磷硅水泥植生型固化淤泥质土技术的理论框架。本项目将为利用材料再生技术来消解环境问题的研究提供示范，并为磷硅水泥替代硅酸盐水泥用于新一代淤泥质土固化技术奠定理论基础。

The transformation of billions of cubic meters of dredged mucky soil to land resources by soil stabilization technique has great significance. Since the organic pollutants in dredged mucky soil are slightly acidic, more Portland cement should be used for the stabilization of dredged mucky soil, which results in the increasing of the alkalinity of the stabilized soil. Hence, the stabilized mucky soil with excess Portland cement is difficult to reclamation. With the academic thought of “using wastes to treat contaminants for sustainability”, a new type of phosphor-silicate cement based on industrial wastes/byproducts and phosphatic fertilizer is developed as a new-generation cementitious material for the Eco-consolidation of mucky soil. On the basis of the previous studies on magnesium phosphate cement, the preparative technique for high mechanical and workable properties is studied, which can occur the synergistic effect with the stabilization of mucky soil. The molecular simulation methods are used to uncover the fundamental science on phosphor-silicate cement and organic pollutants. Then, nano/micro test techniques are applied to characterize the microstructure and chemical composition, revealing the physical and chemical mechanisms of phosphor-silicate cement stabilizing the mucky soil. Finally, the multi-scale stabilization and percolation models based on microscopic pore mechanics theory are built up, establishing the fundamental theoretical framework of the Eco-consolidation of mucky soil based on phosphor-silicate cement. This project will generate scientific and technological impacts on multifaceted sustainability, and it also lays a theoretical foundation for a new-generation stabilization technique of mucky soil with phosphor-silicate cement substituting Portland cement.