Building a sustainable human habitat on the Moon requires advances in excavation, paving, and additive manufacturing to construct landing pads, surface transportation arteries, resilient shelters, and scientific outposts. Various methods have been proposed for consolidating lunar regolith into load-bearing structures, but each has challenges related to incomplete understanding of reaction chemistry, excessive thermal budgets, and lack of universal applicability. This study describes a versatile experimental and computational approach using siloxane networks to consolidate regolith into a feedstock suitable for lunar infrastructure construction.
Building a sustainable human habitat on the Moon requires advances in excavation, paving, and additive manufacturing to construct landing pads, surface transportation arteries, resilient shelters, and scientific outposts. Construction of infrastructure elements on the lunar surface necessitates exploration of the interfacial reactivity of locally sourced regolith and the adaptation of Earth-based construction techniques. Various crosslinking frameworks and sintering methods have been proposed as a means of consolidating lunar regolith into load-bearing structures but each have challenges related to incomplete understanding of reaction chemistry, excessive thermal budgets, and lack of universal applicability to different mineral components of regolith. We describe here a versatile experimental and computational study of the consolidation of a regolith simulant through formation of siloxane networks enmeshing mineral particles by surface dissolution-precipitation and polycondensation reactions. Furthermore, by tailoring the rheological properties of the formulation an additive manufacturing feedstock can be developed for the construction of lunar infrastructure.
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