The paving of the binder and surface courses was done in possibly record-breaking time, as AzVirt had an impressive armada of VÖGELE pavers and HAMM rollers at the start. The absolute highlight was the hot-on-hot installation in the area immediately in front of the beach promenade: There, seven of the eight SUPER 1900-2 pavers and 15 Hamm tandem rollers built a 52 meter wide area in a single operation. A real highlight for all participants!
HD, HD+ and HD CompactLine for high-quality compaction
To obtain optimum surface quality, AzVirt relied exclusively on tandem rollers from HAMM during compaction. The articulated machines of the HD, HD+ and HD CompactLine series ensure, through their very construction, an even weight distribution – an important prerequisite for high evenness without ridges and cracks. Another important advantage of HAMM rollers is their excellent visibility. The large rollers of the HD+ series primarily stand out for their panoramic cab. The machines of the HD CompactLine come with a "wasp-waist" front frame that provides an optimum overview of the working area. Last but not least, the HAMM rollers score points with their outstanding side clearance. In Baku, it enabled high-quality compaction along the many curbs, fixtures and walls, right to the edge. In the process, the drivers also appreciated the large track offset of the articulated rollers that made it easy to achieve precise compaction of the edges.
Oscillation protects historic buildings
Another decisive factor for the high-quality compaction was the use of rollers with oscillation. This technology involves dynamic compaction that directs only few vibrations into the ground around the roller. That was crucial here, because the track is lined with many historic buildings and below the carriageway there are underground car parks and underpasses. Therefore, in most areas, conventional compaction with vibration was absolutely forbidden. "Instead, the paving plan required HAMM rollers with oscillation," explains asphalt specialist Hart, adding that "Everything has remained intact and, at the same time, we have achieved excellent compaction results." In Baku there was one more reason for oscillation compaction: The special movement of the oscillation drum produces very flat surfaces, with good initial skid resistance. Also thanks to this technology, AzVirt was able to meet the extremely high levelness requirements of 3 mm on a 4 meter long straight edge.