General idea for ground textures


I plan on making taxiways and my aim to keep it as realistic as possible (adding scratches and cracks to the taxiway etc.). I may not get the final result, but I still want to give it a go. I've seen lots using Gmax, while others have used Blender. I'm wondering which guide can help me on creating these taxiways and which software to use.
I've had a glance with this video
and I've also looked at this post as well:
I'm wondering if this is the right direction into making realistic taxiways.

Many thanks