混凝土3D打印凭借其无模化、快速化、灵活化的优势在土木建筑领域发展迅速。地聚合物是一种环保低碳的混凝土材料，具有优异的力学和耐久性能，其速凝早强的特性适用于3D打印工艺。然而，3D打印是一种无筋建造工艺，打印结构的力学承载能力较弱。本项目研制可3D打印的地聚合物材料，分析工作性能与打印工艺的协调性，建立3D可打印性能的量化评估方法；研发纤维微筋增强3D打印地聚合物的同步布筋方法，研究不同微筋与地聚合物基体的界面粘结和增强性能，实现3D打印材料的增强增韧；应用微观探测分析手段，揭示相邻打印层细观界面对地聚合物力学行为的影响机制，研究纤维微筋增强地聚合物的宏细观力学性能与变形破坏机理；建立3D打印结构结合拓扑优化与路径规划方法，在满足力学承载性能的条件下，实现地聚物加筋结构的轻量化。本研究提供一种有效的3D打印地聚合物的同步加筋方案，为地聚物的脆性改性与承载性能的改善提供实验基础和理论依据。

3D concrete printing gain rapidly development in the field of civil engineering and construction, with various advantages such as mouldless, rapidness and high flexibility. Geopolymer belongs to a kind of environmental protection and low-carbon concrete material, which has excellent mechanical and durable properties. The characteristics of the early strength is particularly suitable for 3D printing process. However, 3D printing is a kind of unreinforced construction process, and the printed structures perform relatively low carrying capacity. This study firstly develop 3D printable geopolymer materials, analyze the coordination between the work performance and printing process, and establish a quantitative assessment method for the manufacturing of 3D printable geopolymer; In particular, to improve and enhance the 3D printed geopolymer, this study propose an innovative reinforcement method to synchronously distribute fiber micro-reinforcement into the deposited materials, investigate the bonding and enhance performance between the interface of fiber micro-reinforcement and matrix. Employing microstructure detection method to reveal the influencing mechanism of the weak interfaces between adjacent print layers to the macroscale mechanical behavior, and to probe the influence of fiber micro-reinforcement to the macro/mesoscopic mechanical characteristics and deformation failure mechanism of geopolymer; At last, establish topology optimization and path planning method for 3D printing structures, aiming to realize the lightweight of 3D printed geopolymer structure under the condition of sufficient mechanical bearing performance. This study provides an effective and promising solution for the reinforcement of 3D printing geopolymer and provide experimental basis and theoretical references for the brittle modification and mechanical enhancement of 3D printing geopolymer.