May 2008
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DYNAPAC’S COMPACTASPHALT LAYS TWO DIFFERENT COURSES IN A SINGLE PASS
The Compactasphalt paver ensures high quality asphalt layers with extremely longer durability, thinner layers, increased life expectancy, reduced maintenance costs and shorter construction times on projects demanding up to 8,000 t/day.
Compact asphalt, developed by Dynapac, allows the simultaneous laying of two different layers in a single pass. Both the upper asphalt layers – the wearing and binder courses – are laid and compacted simultaneously ‘hot-on-hot.’ As a result, the new concept provides a better interlocking of the two courses ensuring increased life expectancy, higher deformation resistance and lower maintenance costs.
Compactasphalt features a paver with two separate material hoppers for both asphalt mixes, and a special unit to convey the wear course material to a second screed.
The new system uses the add-on module AM300 to handle the wear course mix. It is mounted onto a high performance F300CS paver, together with the second screed.
The wear course mix is fed by a special feeding system on the new MF300C tracked feeder into the second material container on the paver. When required for conventional paving duties the AM300 module can be easily dismounted at any time.
The hopper for the lower layer – generally the binder – has a capacity of 45 t. The hopper for the wearing course holds 27 t. The use of mobile feeders allows a continuous movement of the paver, improving the surface evenness. Due to the simultaneous compaction of both the wearing and binder courses, a quality bond is produced between the courses, generating a monolithic upper layer.
The unit can achieve a paving speed of 20 metres per minute and features a standard three-metre paving width, up to a maximum 16 metres.
The compact construction method sets completely new standards for highway construction and is eminently suited for large construction works.
A laying capacity of 4,000-5,000 t/day, and up to as much as 8,000 t/day, ensures a shorter construction time, which is crucial for highly travelled highways.
Asphalt laying is also possible earlier and later in the season, with temperatures to below zero Celsius. The reduced thickness of the wearing course also allows the economical use of additives for polishing resistance and edge strength.
Dynapac
RRC #5012
RRC #5012
