Density and rideability is the goal of a quality Superpave mix. There is no such thing as a State-approved B, C, or D mix anymore. All towns should require a State-approved mix design for its hot mix pavements. Superpave must be put down thicker than the conventional mixes. Superpave mixes have higher quality aggregate, very little sand, and less liquid asphalt binder, making them more rut-resistant and durable, as long as they are applied correctly.
Any pavement is only as good as the underlying material and whether good drainage exists.
A super clean surface must be ready prior to paving. Compaction is even more critical with Superpave mixes and must be started earlier than normal and have the rollers close behind the paver. The numbers relate to the average maximum and minimum temperatures in Celsius which the mix can withstand. In Maine and other New England states, PG 64 -28 is the most common liquid asphalt used in Superpave mixes. Prices for Superpave should not be much different than the previous mixes.