Characteristics of Lunar Geopolymer Based on KLS-1 Simulant Considering Particle Size Distribution

Abstract

As global efforts in lunar exploration accelerate to secure resources and establish a strategic presence, the development of optimized construction materials for building lunar bases becomes critical priority. This study explores the synthesis of lunar geopolymer using the simulant to mimic the regolith in the lunar Mare region, focusing on the impact of particle size to enhance mechanical properties. The specimens were characterized using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), pore size distribution (PSD), scanning electron microscopy (SEM), and Raman spectroscopy. The results indicate that the use of finer particles enhances the formation of the aluminosilicate network, leading to increased strength. This study demonstrates a simple sieving process can significantly enhance the performance of lunar geopolymers, providing a practical and scalable approach for constructing durable lunar structures. This research advances our understanding of high-performance materials for lunar infrastructure, contributing to the advancement of the potential for sustainable space exploration.