We opened up a utility cut on an old taxiway/access road tonight and we saw there was some kind of fiber mesh in between two layers of asphalt. I've never seen anything like this used as a tack before, does it serve another purpose? Let me know if you've seen anything like this before. Guido's half arse diagram: -Top layer asphalt -Fiber grid squares w/ 1/2" - 3/4" holes in it -Binder layer of aspahlt -tack coat -base course -Australia Hope someone can clearify this for us! Thanks in advance!