Standard Specification for Materials for Ultrathin Bonded Wearing Course standard by American Association of State and Highway Transportation Officials, 2020
AASHTO MP 44-20 covers the requirements for polymer-modified emulsified asphalt, performance-graded asphalt binder, mineral aggregate, mineral filler, and additives used in an ultrathin bonded wearing course. An ultrathin bonded wearing course, usually 1/2 to 1 in. (12.5 to 25.4 mm) thick is placed on existing pavement surfaces using specially designed paving machines.
