Method for Producing a Road Surface, Preferably a concrete road surface, and road paver

Abstract

In the production of road surfaces of asphalt and concrete (33), it has been necessary hitherto to use different road pavers, which requires additional complexity, in particular when a wearing course (32) of concrete (33) is to be applied to a base (31) of asphalt. The invention provides to produce road surfaces of concrete (33) with a road paver intended for the processing of asphalt in that suspended vibrating bodies (23) are used which are inserted at least partially into the concrete (33) to be compacted. As a result, a road surface of concrete (33) can be produced with a road paver intended for the laying of road surfaces of asphalt. A laying screed (17) of the road paver is preferably guided rigidly, that is to say non-height-adjustably.

Description

STATEMENT OF RELATED APPLICATIONS[0001]This application is based on and claims the benefit of German Patent Application No. 10 2009 038 007.8 having a filing date of 20 Aug. 2009, which is incorporated herein in its entirety by this reference.BACKGROUND OF THE INVENTION[0002]1. Technical Field[0003]The invention relates to a road paver having a drivable set of running gear and at least one smoothing device which is arranged behind the running gear as seen in the paving direction, and also compacting means for the road-building material, preferably concrete, in front of the smoothing device. Furthermore, the invention relates to a method for producing a road surface, preferably a concrete road surface, with a self-propelled road paver from which the road-building material is compacted with compacting means and then is smoothed by at least one smoothing device.[0004]2. Prior Art[0005]Road surfaces are produced from asphalt (blacktop) or concrete. Moreover, however, there are also road...

AI Technical Summary

Benefits of technology

[0007]The object on which the invention is based is to provide a method which makes it possible with a road paver for asphalt road surfaces also to produce concrete road surfaces, in particular concrete wearing courses. It is an additional object of the invention to provide a road paver for the production of asphalt road surfaces which can also be used to produce concrete road surfaces.

[0008]A road paver for achieving this object has a drivable set of running gear and at least one smoothing device which is arranged behind the running gear as seen in the paving direction, and also compacting means for the road-building material, preferably concrete, in front of the smoothing device, characterized in that the compacting means are designed as vibrating bodies which are inserted at least partially into the road-building material. Accordingly, it is provided to design the compacting means as vibrating bodies which are inserted at least partially into the road-building material. The vibrating bodies make it possible with a road paver intended for the production of asphalt road surfaces to produce concrete road surfaces in that, by contrast with the production of asphalt road surfaces, where pressure is exerted from above onto the asphalt road-building material, the concrete is compacted not by pressure, but by oscillations, by the vibrating bodies inserted at least partially into said concrete. Consequently, the road paver according to the invention meets an essential prerequisite which is required to produce concrete road surfaces.

[0010]A preferred development of the road paver provides to fasten the vibrating bodies in a suspended manner on preferably one carrier. The carrier can be one on which the smoothing device and / or other components of the road paver are also held. The suspended arrangement makes it possible for the vibrating body to “dig” into the fresh concrete to an intended depth by means of vibrating movements in order to produce the road surface. The suspended arrangement of the vibrating bodies can take place on slack cables or chains, with the result that they can move out laterally, that is to say do not have any guidance in the paving direction and transversely thereto. However, it is preferably provided to suspend the vibrating bodies in a guided manner, preferably on rigid or on substantially rigid rods or tubes or similar strands. This prevents the vibrating bodies from deflecting or moving together as a result of the road paver moving along in the paving direction. Furthermore, tubes for the guided suspension of the vibrating bodies on the carrier can preferably serve for the energy supply of the vibration or unbalance generator arranged inside the vibrating bodies. These can be electric, hydraulic or else pneumatic lines.

[0011]It is further provided to arrange the vibrating bodies in at least one row extending transversely to the paving direction. Preferably, the vibrating bodies of at least one row are suspended over the entire working width of the road paver in a distributed manner on the carrier. As a result, the fresh concrete can be compacted uniformly over the entire working width.

Problems solved by technology

That is particularly complicated when a wearing course of concrete is to be applied to an asphalt base.

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