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首页> 外文会议>Biennial International Conference on Engineering, Science, Construction, and Operations in Challenging Environments >Designing Biopolymer-Bound Regolith Composites for Maximum Compressive Strength
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Designing Biopolymer-Bound Regolith Composites for Maximum Compressive Strength

机译：设计生物聚合物结合的表土复合材料以获得最大抗压强度

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摘要

Extraterrestrial construction presents many interesting and new challenges. Transporting large amounts of construction materials from Earth is cost prohibitive. Thus, to take advantage of limited in situ extraterrestrial resources, this work focuses on a novel class of biopolymer-bound soil composite (BSC) materials. These quasi-brittle composites are produced by desiccating a mixture of soil, water, and a biopolymer binder to create a versatile material with uniaxial compressive strength comparable to concrete. This paper expands upon a BSC design methodology for regolith soils. Previous work has been successful in reliably designing BSC materials with graded sands that exhibit compressive strengths above 20 M Pa. Lunar regolith, JSC-1A simulant presents an additional challenge due to the broad ranges of the soil particle sizes. Nineteen BSC mixes using JSC-1A regolith were tested with varying biopolymer solution concentrations and biopolymer to soil ratios. A maximum compressive strength of 25 MPa was obtained at a biopolymer concentration of 48% and a biopolymer to soil ratio of 12.4%. A brief discussion on the effect of manufacturing variables on compressive strength and bulk density is presented. Finally, a design tool is introduced to design regolith BSC for desired compressive strength for future use in the structural design of structures on the Moon, Mars, or other extraterrestial bodies.
机译：外星构造提出了许多有趣的新挑战。从地面运输大量建筑材料成本高昂。因此，为了利用有限的地外原位资源，这项工作的重点是一类新型的生物聚合物结合土壤复合材料（BSC）。这些准脆性复合材料是通过干燥土壤、水和生物聚合物粘合剂的混合物来制造的，以创造一种具有与混凝土相当的单轴抗压强度的多功能材料。本文扩展了表土的BSC设计方法。之前的工作已经成功可靠地设计了BSC材料，其中级配砂的抗压强度超过20 M Pa。由于土壤粒径范围广泛，月球风化层JSC-1A模拟物提出了另一个挑战。使用JSC-1A风化层的19种BSC混合物在不同的生物聚合物溶液浓度和生物聚合物与土壤的比例下进行了测试。当生物聚合物浓度为48%，生物聚合物与土壤的比例为12.4%时，最大抗压强度为25 MPa。简要讨论了制造变量对抗压强度和体积密度的影响。最后，介绍了一种设计工具，用于设计风化层BSC，以获得所需的抗压强度，以便将来用于月球、火星或其他外星人的结构设计。

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