It would be a far better use of the water to save it for life support or crack it into hydrogen and oxygen. Regolith can be used to create structures without ha

It would be a far better use of the water to save it for life support or crack it into hydrogen and oxygen. Regolith can be used to create structures without having to haul everything up out of Earth's gravity well. It's also chock full of aluminum, so that would be easy to make with a nuclear or solar smelter. But water would never be used as a structural material, that would be a tremendous waste.