· Nicole Willett

Building Mars: Modeling Permanent Structures Using Mars-Sourced Materials

Mars settlement construction regolith ISRU Mars architecture

Guest Blog By: Lorena Bueno

Edited by: Margaret Lattke

Crack open any mid-level science novel from the last 70 years and you’ll find, among fanciful descriptions of grand canals and sand-scattering weather systems, varied descriptions of what’s underfoot (or boot): Martian sand. Regolith, powder, basalt rock, even clay, hint at a time when Mars had a very different environment than the cold, arid world we observe today.

The question of how to build permanent structures on Mars is one of the most critical challenges facing future human settlement of the Red Planet. Unlike missions to low Earth orbit or even the Moon, Mars missions will require settlers to construct durable habitats using materials found on-site, a concept known as In-Situ Resource Utilization (ISRU).

Mars offers a surprising variety of construction materials. The Martian regolith, the loose soil and rock covering the surface, contains basalt, iron oxide, silica, and various clays. These materials, when properly processed, could serve as the building blocks for everything from radiation shielding to structural components.

Researchers have explored several approaches to Martian construction:

  • Sintered regolith bricks: Using focused solar energy or microwave radiation to fuse Martian soil into solid building blocks without the need for water or binding agents.

  • Martian concrete: Mixing regolith with sulfur, which melts at relatively low temperatures and acts as a binding agent when cooled, creating a concrete-like material.

  • 3D printing with regolith: Additive manufacturing techniques that could build structures layer by layer using processed Martian soil as the printing medium.

  • Ice structures: In regions where water ice is abundant near the surface, ice could be harvested and used as a transparent construction material, providing both structural support and radiation protection while allowing natural light to enter.

The Mars Society and other organizations have sponsored design competitions challenging architects and engineers to develop practical, buildable habitat designs using Mars-sourced materials. These competitions have produced innovative concepts that push the boundaries of what is possible with extraterrestrial construction.

Understanding the properties of Martian regolith is essential for any construction effort. Data from rovers like Curiosity and orbiters like Mars Reconnaissance Orbiter have provided detailed analyses of soil composition across various regions of Mars, helping engineers plan for the specific materials they will have to work with.

The challenge of building on Mars extends beyond materials science. Structures must withstand the planet’s extreme temperature swings, from highs near 20 degrees C at the equator to lows of -120 degrees C at the poles. They must also provide adequate radiation shielding, as Mars lacks the thick atmosphere and magnetic field that protect Earth’s surface from cosmic radiation.

Despite these challenges, the prospect of building permanent structures on Mars using locally sourced materials represents one of the most exciting frontiers in space exploration. When humans reach Mars, they will not merely visit — they will build, creating the first permanent human presence on another planet.