We can read about Moon exploitation and making bases on there for long-term colonies. But bringing materials to make buildings there does not makes economical sense, and a large spaceship may be a hard bet. It seems to make much more sense to make buildings out of local resources.
Are there enough resources on the Moon to make a concrete-like building to host operations?
I wonder what kind of materials could be used to make walls and floors and ceilings. On Earth, we use basically sand, water, etc.