I've been browsing through the webcomics site Grandpapier, and I just found the comic/series "384" by someone called G#ROM. The pages are all filled with dozens of tiny panels. Some of them are fragmented representational imagery, but the sheer volume of them starts to bleed out any real meaning, creating an abstract pattern. Some of the pages (2 and 4) are more purely abstract comics (page 4 is rather reminiscent of some of Andrei's work).
The same artist's "Recadrage" (reframing) is also an abstract comic, which has a wonderful physical/material presence to it.