What percentage of maximum specific gravity must S9.5B mixes reach for successful compaction?

For S9.5B mixes, successful compaction typically requires that the achieved density reaches at least 90.0 percent of the maximum specific gravity. This percentage is established based on industry standards that ensure the pavement has the necessary structural integrity and performance characteristics. Achieving this level of compaction helps to minimize air voids and enhance the durability of the asphalt mix, thereby contributing to a longer service life and better resistance to deformation under traffic loads.

Compaction at 90.0 percent of maximum specific gravity strikes a balance between ensuring the material is dense enough to withstand environmental and mechanical stresses while also allowing for proper handling and application during construction. This standard is critical in maintaining the quality and longevity of roadway surfaces.