If you fade the base color texture you can have the concrete show through:
But it looks a bit washed out. But you can play with the base color’s settings to get some of the definition back:
I also tried deleting the base color completely and it gives a bold opaque effect.
To get the stripes they’re just boolean difference’d. Not sure if that workflow will work for you. I’ve also texture mapped the entire block together so that the textures will align.
