To resist rutting To resist cracking The temperatures indicated are the average seven-day maximum or minimum pavement temperatures for a given region of the Unites States. The Wisconsin Asphalt Pavement Association recommends the following choices for your every day needs. PG 64-22 for higher volume uses such as major arterial streets, industrial streets or industrial lots. The Wisconsin DOT recognizes other binders as appropriate for Wisconsin. Most of these are binders that can only be purchased as modified.
Modified binders are considerably more expensive then unmodified binders.
This additional expense would not likely be appropriate or necessary for most normal projects. There are special cases, however, that may require the use of modified binders. If you are specifying a pavement with extreme or unusual traffic conditions please contact WAPA or your local WAPA contractor for further recommendations. The Wisconsin DOT has assembled a new list of mixes that are all superpave designed. These mixes are part of the 2000 Supplemental Specification to the 1996 Standard Specifications and were published in July of 2000.