Royals Contracting
Driveway & Paving Company in Durham, NC

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read moreAsphalt is made up of various sized aggregates, sand or screenings, and AC-20 ( Tar ). It is mixed thoroughly and heated to approximately 300 degrees. It is most important to install the asphalt while it is still hot in order to achieve maximum compaction as well as blending the various "mats " behind a paver and having them bond together. The stronger "B" and "H" mixes have larger aggregates basically for strength and durability. The mixes, S9.5A and S9.5B, are your surface mixes and have a much smaller aggregate size as well as more sand or screenings for smoothness.