After rolling, what in-place air-void range does the Hot-Mix Asphalt Paving Handbook generally associate with a properly compacted dense-graded mat?

1. 0% to 1%, because any void is a defect
2. About 6% to 8%
3. 15% to 20%, the same as an open-graded friction course
4. 25% to 30%, to guarantee drainage through the wearing course