Uncovered terrace


I have two covered terraces in the house project, but I'm thinking of leaving one of them uncovered. In fact, I wouldn't need a terrace there at all, I won't go into the details of why. The problem is that it has already been cast. What can I do to keep it uncovered, but also not to degrade and become a ruin? What could I cover or treat it with to make it last and not be very expensive? Any special concrete layer, tiles, stone of some kind? I would prefer something that does not require maintenance. I know that the main problem is the frost after the rain, I've seen tiles made of dust everywhere, so I'm a little afraid