AASHTO R 108-22

This standard practice for ultrathin bonded wearing course includes a mix design evaluation for the asphalt surface mixture, usually 1/2 to 1 in. (12.5 to 25.4 mm) thick, to determine the proportions of polymer-modified emulsified asphalt that is used as the tack coat, PG binder, mineral aggregate, mineral filler, and additives to produce an ultrathin bonded wearing course job-mix formula.

This standard was formerly designated as provisional practice PP 100.