The following types of rollers can be used for compacting SMA mixtures:
• Static—used as basic equipment for SMA compaction. The heavy (finisher) and medium ones operate chiefly in the set. When compacting is executed on thin layers or layers on a stiff underlying, heavy rollers are excluded.
• Vibratory— used for compacting SMA, but only according to some rules mentioned later.
Pneumatic rollers are not typically used due to the risks of mastic sticking to the tires and dragging particles out of the rolled layer and of squeezing mastic out on the surface.
The following rules should be observed when planning for a combination of rollers for a work site: [63]
• An extra roller with a side-roll for layer edges should be provided, especially with an increased number of construction joints or connections.
• Rollers fitted with a gritter for finishing SMA surfaces are also indispensable (see Section 10.7.1).
