What is the second important factor for vibratory rollers, alongside frequency?

The second important factor for vibratory rollers, alongside frequency, is amplitude. Amplitude refers to the extent or magnitude of the vibration produced by the roller. In the context of compaction, a higher amplitude can enhance the effectiveness of the roller in compacting materials like soil or asphalt, as it allows for a more significant displacement of particles.

When combined with frequency, which indicates how often the vibrations occur, amplitude plays a crucial role in determining the overall impact of the roller on the material being compacted. Selecting the appropriate amplitude helps ensure sufficient penetration of vibrations into the layers of the material, thus promoting effective compaction.

Other factors, while also important in their own right, like roller speed, weight, and width of the drum, do not directly influence the vibratory action in the same way that frequency and amplitude do. Roller speed, for example, can affect how quickly an area is compacted but does not directly correlate with the vibratory characteristics that predominantly affect compaction quality.