Vibratory rollers can finish their pass by which method?

Vibratory rollers are designed to compact asphalt by utilizing vibration during the rolling process. When considering the finishing method for their pass, a static pass is a technique in which the roller is kept stationary while the vibrations are generated. This method effectively consolidates the material without adding further motion that could potentially disrupt the newly laid asphalt.

Utilizing a static pass is particularly beneficial at the end of the compaction sequence because it allows for an even distribution of pressure across the asphalt surface. This helps achieve a smooth and uniform finish, which is essential for the durability and quality of the pavement. The vibration helps interlock the aggregate particles without causing segregation.

Other methods mentioned, like turning passes, oscillating passes, and partial passes, do not provide the same level of effectiveness or finish quality that a static pass offers in the final stages of asphalt compaction. Turning passes typically involve shifting the roller’s direction, which can disrupt the final surface, while oscillating passes tend to be used in earlier stages of compaction rather than as a finishing technique. Partial passes may not cover the entire area evenly, leading to an incomplete compaction.