What are the three rolling stages used in asphalt compaction?

• A. Primary, Secondary, Final
• B. BreakDown Roller, Intermediate Roller and Finish Roller
• C. Roughening, Smoothing, Polishing
• D. Start, Mid, End

Answer: (B)

The idea being tested is that asphalt compaction happens in three progressive stages using different rollers: breakdown rolling, intermediate rolling, and finish rolling.

Breakdown rolling is the initial compacting pass right after the asphalt is laid. A heavy roller presses the loose mix to consolidate it, push aggregates into place, and reduce large air voids. This prepares the mat for further densification without wrinkling or tearing the surface.

Intermediate rolling follows with a roller type that can work the surface and fill smaller voids without overworking the mat. This stage fine-tunes the density and begins smoothing the texture, improving the surface uniformity as the mat gains stability.

Finish rolling comes last with a smooth- or lightly credited roller to produce the final surface quality. The goal here is a dense, even surface with minimal roller marks and the correct texture for riding comfort and drainage.

Other options describe different concepts (general surface roughness or non-rolling phase names) rather than the specific staged rolling process used in asphalt paving.