Using an in situ lunar regolith as a construction material in combination with 3D printing not only reduces the weight of materials carried from the Earth but also improves the automation of lunar infrastructure construction. This study aims to improve the printability of a geopolymer based on a BH-1 lunar regolith simulant, including the extrudability, open time, and buildability, by controlling the temperature and adding admixtures. Rheological parameters were used to represent printability with different water-to-binder ratios, printing temperatures, and contents of additives. The mechanical properties of the hardening geopolymer with different filling paths and loading directions were tested. The results show that heating the printed filaments with a water-to-binder ratio of 0.32 at 80 °C can adjust the printability without adding any additive, which can reduce the construction cost of lunar infrastructure. The printability of the BH-1 geopolymer can also be improved by adding 0.3% Attagel-50 and 0.5% polypropylene fiber by mass at a temperature of 20 °C to cope with the changeable environmental conditions on the Moon. After curing under a simulated lunar environment, the 72-h flexural and compressive strengths of the geopolymer specimens reach 4.1 and 48.1 MPa, respectively, which are promising considering that the acceleration of gravity on the Moon is 1/6 of that on the Earth.

使用原位月球风化层作为建筑材料，结合3D打印，不仅可以减轻从地球携带的材料的重量，还可以提高月球基础设施建设的自动化程度。本研究旨在通过控制温度和添加混合物来提高基于 BH-1 月球风化层模拟物的地质聚合物的可打印性，包括可挤出性、开放时间和可建造性。流变参数用于表示不同水基比、印刷温度和添加剂含量的印刷适性。测试了不同填充路径和加载方向的硬化地质聚合物的力学性能。结果表明，将水胶比为0.32的打印长丝在80℃下加热，可以在不添加任何添加剂的情况下调节打印适性，从而可以降低月球基础设施的建设成本。BH-1地质聚合物还可以通过在20℃的温度下添加0.3%的Attagel-50和0.5%的聚丙烯纤维来提高其印刷适性，以应对月球上多变的环境条件。在模拟月球环境下固化后，地聚合物样品的72小时弯曲和压缩强度分别达到4.1和48.1 MPa，考虑到月球上的重力加速度是地球上的1/6，这是有希望的。