Also available from BOMAG is the BW190AD-4 AM tandem vibratory roller, which delivers continuously optimized compaction performance, regardless of operator experience, thanks to its Asphalt Manager technology. A special front drum designed to work with the Asphalt Manager system automatically measures and controls compaction performance. As the materials become stiff, Asphalt Manager begins to adjust the angle of the drum’s output energy from fully vertical to fully horizontal. This helps ensure that optimum compaction results are achieved while avoiding asphalt-damaging over-compaction.
The BW190AD-4 AM offers 79-in.-wide drums and features slanted drum support legs, high curb clearance and a clear view of the entire drum surface. A fuel-efficient, 131-hp Deutz water-cooled diesel engine powers the BW190AD-4 AM. The front drum delivers 35,550 lb of centrifugal force in high frequency (3,000 vpm) and 55,575 lb of centrifugal force in low frequency (2,400 vpm). The maximum centrifugal force provided by the front drum is 35% higher than units without Asphalt Manager, allowing the roller to complete compaction in fewer passes.
The rear drum of the BW190AD-4 AM produces 24,525 lb of centrifugal force in low amplitude/high frequency (3,420 vpm) and 37,575 lb of centrifugal force in high amplitude/low frequency (2,760 vpm). Independent drum vibration control allows the roller to handle a variety of lift thicknesses and applications ranging from granular bases to Superpave.