This type of ice composite would be super interesting for space structure construction. Melt cometary ice and mix it with additives of some kind and spin big cylinders out of it. You’d just have to make the surface reflective so it doesn’t melt, and possibly have some active cooling which you need anyway if anything inside makes heat.<p>The outer surface would probably be sprayed with something, maybe just reflective dust, to also keep it from subliming into the vacuum.<p>Extremely repairable, melts at human and equipment friendly temperatures, recyclable, doubles as an emergency water reservoir, and last but definitely not least a fantastic radiation shield.<p>Would also work for structures on Mars, the Moon, etc, but I’m a fan of the idea of settling space itself not another planet. Gravity wells are a trap.