Bituminous finisher

Details Bituminous finisher Bituminous finisher

E - Fixed Constructions

01

C

94/41

E01C 19/22 (2006.01) E01C 19/40 (2006.01) E01C 19/42 (2006.01) E01C 19/48 (2006.01)

Patent

CA 1189373

Bituminous Finisher Abstract of the Disclosure The invention relates to a travelling finisher apparatus for laying down a road surfacing layer of a bituminous compound material, comprising a first precompacting and levelling plank carried by a plank frame, and optionally a second levelling plank connected to a vibratory drive arrangement, whereby a particularly high degree of compact ion is achieved so that subsequent roller compaction is not required. This is accomplished by providing a vertic- ally guided compactor bar extending transversely of the direction of travel at the rear of the first levelling plank in the direction of travel and being of substant- ially narrower width than said first levelling plank, said compactor bar being continually in contact with the surface of the precompacted surfacing layer and adapted to be acted on by linear pulsating forces acting between the plank frame and the compactor bar, and generated by a drive source the reaction forces of which are absorbed by the plank frame. As the reaction forces are taken up by the plank frame, it is possible to make use of the mass inertia of the plank frame and the components asso- ciated therewith for generating extraordinarily high force levels at the compactor bar. Together with the narrow contact surface of the compactor bar, this results in very high area unit loads enabling the required high compaction degrees to be achieved. This is also enhanced by tuning the frequency of the compaction force pulses to the natural frequency of the system. The compactor bar and the levelling plank fol- lowing it may be divided into sections adapted to be angularly adjusted relative to one another for forming roof- or trough-shaped surface profiles.

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