Lunar regolith can allow the synthesis of cement materials with near-zero water consumption
Lunar regolith can allow the synthesis of cement materials with near-zero water consumption
复制标题
月球风化层可以在近乎零水消耗的情况下合成水泥材料
DOI：
10.1016/j.gr.2016.11.001
复制
发表时间：
2017
影响因子：
6.1
通讯作者：
Cui XM
中科院分区：
文献类型：
--
作者：
Wang;Kai-tuo;Lemougna;Patrick N.;Tang;Qing;Li;Wei;Cui;Xue-min;Cui Xue-min;Cui XM
随着科学技术的不断发展和人类对月球认识的不断深入，不少科学家计划利用月球建筑材料在月球上建造空间站。环境因素主要包括温差大，而月球表面存在硬真空，对月球建筑材料的性能是一个巨大的挑战。地质聚合物材料具有以下特性：几乎零水消耗、耐高低温循环、真空稳定性和良好的机械性能。此外，它们满足在月球环境中使用的大部分要求。在这里，我们提出了一种潜在的月球水泥材料，它是基于地质聚合物技术，使用火山灰和氢氧化钠溶液作为活化剂制造的。真空条件下处理 24 小时和液氮中冻融循环 30 次的火山灰地质聚合物样品的抗压强度分别为 45.53 和 44.95 MPa。此外，98.61%的水可以回收利用，与实验室模拟月球环境的水回收情况一致。虽然火山灰并不等同于月壤，但我们推测月壤的碱活化可能与火山灰非常接近，因为它们具有相似的化学和矿物成分。综上所述，本研究为基于地质聚合物技术开发近零水耗月球水泥材料提供了可行的途径。
With the continuous development of science and technology and the human understanding of the moon, many scientists have planned the creation of a space station on the moon using lunar building materials. Environmental factors mainly include large temperature differentials, and the presence of a hard vacuum on the surface of the moon is a huge challenge for the performance of lunar building materials. Geopolymer materials have the following properties: approximately zero water consumption, resistance to high- and low-temperature cycling, vacuum stability and good mechanical properties. Additionally, they meet most of the requirements for use in the lunar environment. Here, we present a potential lunar cement material that was fabricated using volcanic ash and sodium hydroxide solution as activator, based on geopolymer technology. The compressive strengths of the volcanic ash geopolymer specimens processed for 24 h under vacuum conditions and 30 freeze-thaw cycles in liquid nitrogen are 45.53 and 44.95 MPa, respectively. Additionally, 98.61% of water could be recycled, in consistence with the water recycling-simulated lunar environment in the lab. Although volcanic ash is not equivalent to the lunar soil, we speculate that the alkali activation of lunar soil could be very close to that of volcanic ash because of their similar chemical and mineralogical composition. In summary, this study provides a feasible approach for the development of near-zero water consumption lunar cement materials based on geopolymer technology.