Practice question
For most dense-graded HMA mixes, when should breakdown and intermediate rolling generally be finished relative to mat temperature?
- After the mat has cooled below 100°F so the rollers will not leave marks
- While the mat is still hot and workable, typically before it cools to about 175°F
- Only after a 24-hour cure, the same as Portland cement concrete
- Only when the plant mixing temperature exceeds 400°F
Answer: B — While the mat is still hot and workable, typically before it cools to about 175°F
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