Mars construction biomaterial development

Researchers in Hong Kong have developed a 3D-printable biological material designed for construction on Mars using In-Situ Resource Utilization (ISRU). The material is composed of sand or regolith-like substances, gelatin, and genetically engineered yeast that produces adhesive proteins inspired by how mussels attach to rocks.

In laboratory tests simulating Martian environments—specifically at -30 degrees Celsius and a pressure of 0.01 atmospheres—the material underwent a freeze-drying process. This resulted in an average compressive strength of approximately 12 megapascals and a flexural strength of 6 megapascals. The material has demonstrated the ability to maintain mechanical performance even after being recycled four times.

While the technology offers a potential alternative to energy-intensive sulfur-based concrete, it remains in the early stages of development. Current prototypes are limited to small-scale structures, such as domes roughly 45 millimeters high, and further research is required to address challenges regarding radiation shielding, thermal insulation, airtightness, and the transition to full-scale autonomous construction.