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Note: Some questions are repeated. Whenever a question is appropriate for more than 1 subject area they have been put each applicable area.

Q:

Can the same paving equipment be used for Superpave mixes that was used for conventional mixes.

A:

Yes. However, since Superpave mixes do tend to be coarser and more often contain modified binders than conventional mixes, good construction practices are more important than ever. Segregation is more likely to occur with coarser mixes if proper equipment and techniques are not used. Density can also be more difficult to achieve with Superpave mixes. Proper rolling techniques and adequate equipment are essential to achieve sufficient compaction. Breakdown rolling for Superpave mixes is normally done right behind the paver when the mix is hottest. Some contractors have found that additional and/or heavier rollers are sometimes needed. Pneumatic rubber-tired rollers work well, but tend to stick to the mat when polymer modified asphalt is used.Hand-working should be minimized. Sufficient well-graded (not segregated) material should be supplied by the paver augers to the joint to facilitate a low voids, low permeability seam.