If we are planning to build on the moon then it is necessary to know what we can find where. The only geologist on the moon was with the Apollo 17 mission, that was some time ago. Luckily we have better technology now and can from distance examine the moon, all be it not so profound as touching the real stuff. Ok, first we need concrete materials and maybe steam to mix and moisture them. I suppose the overall moon dust will be fine as a basic material. If we could find ice in the same place then that would be a surplus for a factory. Making concrete roads would make transportation faster and concrete plains would be good for landings and take-offs. Lets build with concrete on the moon.