Study finds astronaut blood mixed with Mars soil makes ultra-hard concrete

A future Mars civilization has the potential to be built with the blood, sweat, and tears of astronauts — literally. A study has found that mixing proteins from blood plasma, urea from urine and human sweat with Martian soil makes a material stronger than the concrete we use on Earth. They estimate that a six-person crew could create almost 500 kg of the material (dubbed “AstroCrete”) in two years, with production scaling up whenever new crew members are added to the mission.
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