A paving machine including a modular frame, a plurality of swing legs pivotable relative to the frame, a jacking column secured to each swing leg, a crawler track, a slew gear drive, and angular position transducers for measuring an angular position between the swing leg and the modular frame, and an angular position of the crawler track relative to the jacking column. Feedback from the transducers facilitates maintaining position of the crawler track. The jacking column can include telescoping outer and inner tubes, a vertically oriented hydraulic actuator including a cylinder and a piston operable within the outer and inner tubes, and spaced apart axial bearings coupled to the outer tube and/or the inner tube. The slew gear drive can be secured between the inner tube and a yoke and capable of steering the crawler track under load without lifting the crawler track.

A road paver comprises a paving screed, wherein the paving screed comprises a tamper, and the road paver further comprises a GNSS receiver and a material conveyor. In addition, the road paver comprises an electronic control system, which comprises a memory and a data processor, wherein digital construction data, in particular a target height profile of a road surface to be paved, a target layer thickness of paving material and, if necessary, a height profile of a roadbase are stored in the memory. The control system is configured to automatically control compaction performance of the paving screed as a function of the target layer thickness in order to pave the paving material for the respective local coordinate point of the road paver determined by the GNSS receiver.

A system of differential working is provided wherein a controller of a construction machine is provided with a working depth data set and with a design surface data set. A location of the construction machine within a reference system external to the construction machine is determined, for example using a global navigation satellite system. The controller may determine the desired working depth at the current locations of the ends of the working implement from the working depth data set. The controller may determine the desired cross-slope at the current location of the working implement from the design surface data set. The desired working depths and the desired cross-slope may be communicated to a grade control system of the controller.

A method includes receiving first information indicative of a first selection of a machine disposed at a worksite, wherein the first information is received from an electronic device disposed remote from the worksite. The method also includes receiving second information from the electronic device, wherein the second information is indicative of a second selection of a component of the machine. The method further includes determining, using at least one sensor, that an area surrounding the machine is free from unknown objects, and receiving third information indicative of a request to activate the component. The method also includes causing activation of the component based at least in part on the third information.

A method of slip forming a concrete structure can include using a first slip form mold that travels along a path to form a portion of a concrete structure by delivering a first flow of concrete into the first mold through a first hopper. The first hopper can be configured to receive the first flow of concrete. The portion of the concrete structure can be modified using a second slip form mold different from the first mold by advancing the second mold along the concrete structure and, while advancing the second mold, delivering a second flow of concrete into the second mold through a second hopper that is configured to receive the second flow of concrete.

A paving machine can include a frame; a screed coupled to the frame; a plurality of sensors to scan a surface of an asphalt mat behind the screed; and a controller coupled to the plurality of sensors, the controller configured to determine a smoothness of the asphalt mat and to make changes to one or more paving characteristics of the paving machine to improve the smoothness of the asphalt mat.

A pavement repair system is provided utilizing solid phase auto regenerative cohesion and homogenization by liquid asphalt oligopolymerization technologies. The system is suitable for use in repairing asphalt pavement, including pavement exhibiting a high degree of deterioration (as manifested in the presence of potholes, cracks, ruts, or the like) as well as pavement that has been subject to previous repair and may comprise a substantial amount of dirt and other debris (e.g., chipped road paint or other damaged or disturbed surfacing materials). A system utilizing homogenization by liquid asphalt oligopolymerization is suitable for rejuvenating or repairing aged asphalt, thereby improving properties of the paving material.

A road paver comprises a paving screed, wherein the paving screed comprises a tamper, and the road paver further comprises a GNSS receiver and a material conveyor. In addition, the road paver comprises an electronic control system, which comprises a memory and a data processor, wherein digital construction data, in particular a target height profile of a road surface to be paved, a target layer thickness of paving material and, if necessary, a height profile of a roadbase are stored in the memory. The control system is configured to automatically control compaction performance of the paving screed as a function of the target layer thickness in order to pave the paving material for the respective local coordinate point of the road paver determined by the GNSS receiver.

A paving machine for spreading, leveling and finishing concrete having a main frame, center module, bolsters laterally movably, and a crawler track associated with respective aft and forward ends of the bolsters. A bolster swing leg for each crawler track supports an upright jacking column. A worm gear drive permits rotational movements of the crawler track and the jacking column. A hinge bracket is interposed between each swing leg and a surface of the bolsters to enable pivotal movements of the swing leg. A length-adjustable holder engages the pivot pin on the hinge bracket and pivotally engages the swing leg. The holder permits pivotal motions of the swing leg in its length-adjustable configuration and prevents substantially any motion of the swing leg in its fixed-length configuration. A feedback loop cooperates with transducers keeping the crawler tracks position. The paving machine can be reconfigured into a narrowed transport configuration.

The disclosure refers to a road paver fur producing a paving layer, comprising a chassis and height-adjustably mounted paving screed for compacting a paving material, wherein the paving screed has at least one external control station with a control device comprising at least one control device for setting process parameters and at least one display for displaying process parameters. The road paver further comprises a projector which is adapted to project at least one of the process parameters set on the operating panel and/or displayed on the display onto at least one projection area so that the projected process parameter is visible, in particular for an operator of the paving screed. The disclosure also refers to a method for projecting a process parameter by means of a projector of a road paver.