HMA Base Courses
HMA Base Courses
(OP)
Looking for comments/feedback on a contractor requested design change for the HMA base course on a 12,000 ADT roadway. They want to use a 3/4" mix, instead of the specified 1" mix for the base course.
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RE: HMA Base Courses
If so, it makes no difference for the base course...in fact, most HMA base courses are even finer than 3/4" nominal.
If that is not what you meant, please explain.
RE: HMA Base Courses
Regarding binder, NYSDOT's Comprehensive Pavement manual states "The 25.0 mm size should be used for pavements with 20 year ESAL counts over 10 million.
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