With the first human settlement on Mars to be established soon, researchers at Northwestern University think they may have found a solution to building shelters on Mars before the humans arrive.
Researchers have developed a concrete using sulfur and material that mimics Martian soil. The material is 2 times stronger that regular sulfur concrete and has stones and rocks that measure just 2 or 3 mm. Ordinary sulfur concrete that we use here on earth has aggregate particles of about 10mm.
This makes the concrete more fire resistant than traditional sulfur concrete. The sulfur also reacts differently to Mars soil, the sulfur acts like a glue and there is no reaction.
There is a possibility that the new concrete could be used to 3D print buildings before human settlers arrive.