hu en de ro

Road and bridge building machinery


Asphalt test specimen rolling equipment


It is used to manufacture basic material for laboratory experiments by simulating as truly as possible the movement and the loading conditions of the road roller according to the real asphalt laying process, if needed by measuring and documenting the process.

 

Asphalt test specimen grinding equipment


It prepares the asphalt test specimen for density analysis providing a new, environment-friendly and at the same time economic preparation method meeting the requirements of the European standards instead of the old, heavily polluting method menacing the health of laboratory assistants.

Small wheeled rut testing equipment for two test specimens


It examines the rutting process on two test specimens at a time in a temperature-regulated environment, in an isolated cabinet according to the standard.
If necessary the measurement report can be printed via a computer connected to the equipment.

Big wheeled rut testing equipment for two test specimens


It examines the rutting process on two test specimens at a time under the prescribed load with Trelleborg tyre with constant pressure according to the standard.
The temperature of the testing room is regulated. The profile changes of the rut are registered by a laser measuring system.
We provide also a measurement evaluating software.

Asphalt cold crack testing equipment


The loading equipment is located in a cooling chamber of controlled temperature.
The test can be effected up to - 40 oC at a cooling gradient according to the standard.
The loading equipment is operated by a servo drive of a regulating accuracy of 0,1 μm referring to the test piece. The length change is tested by eddy current measuring units.
An evaluation software is also provided.

 

Crack testing equipment for cloth-insertion asphalt


The equipment is of horizontal layout. The test is carried out in a room that can be cooled up to -20 oC. The loading equipment is located in a cooling chamber of controlled temperature. The loading equipment is operated by a servo drive of special accuracy capable to carry out the test according to the standard. An evaluation software is also provided.

Reverse-bending fatigue testing machine


It is suitable to carry out reverse-bending fatigue test of asphalt test specimens. The actual design meets the requirements of standard MSZ-EN 12697-24:2003 (reversed four-point bending fatigue tests). The measuring process is automated. Technical data:
• test frequency: 0-60 Hz
• maximum amplitude: 0,6 mm, sinusoidal amplitude-time function
• allowable maximum reaction force: 10 kN
• test temperature: 0 - 30 °C

Expansion gap cutting equipment


In order to avoid expansion cracks, according to the Hungarian road building regulations it is compulsory to make periodical incisions/separations in the cement stabilization layer.
• the equipment is suitable to completely cut through roads of different width up to 13 m
• the road cutting can be effected in perpendicular direction in an angle of +/- 6°
• the easy movement of the blade is ensured by vibration
• the blade is wear resistant and can be changed
• the temperature of the bitumen emulsion can be stabilized by gas burner
• it is PLC controlled from the operator’s cage

Flame-free asphalt heating equipment


The equipment helps prolong the road building season. It allows asphalting below +8 °C.

It is equipped with special gas-infrared heating units.  The applied technology allows flame-free heating of the asphalt. During this process  on the one hand the bitumen does not melt out from the pavement, on the other hand the deeper asphalt layers will also be heated through.

 

 

Modernization of concrete and asphalt mixing plants


We have introduced state-of-the-art measuring technique and computer control in traditional concrete and asphalt mixing plants. The system introduced by us ensures a feedback of the product composition.

Innovation in bridge building: pushing bridge steel construction into place


It was one of our greatest successes. Our company has been the winner in a tender for pushing bridge steel construction into its place over the Danube at Dunaújváros. For the applied method, which is a Hungarian patent allowing continuous axial pushing-in of bridge steel construction of any length, our company has been awarded Industrial Innovation Prize in 2006.


Our duties in the project:
• designing the hydraulic system
• manufacturing the hydraulic power units and hydraulic cylinders
• assembly on the spot, installation
• scheduled pushing-in
• system surveillance during the pushing-in
• full service

 


The pushing-in mechanism is operated by a 600 bar hydraulic power unit. The pushing-in process, using CAN bus communication and distance measuring sensors, is fully automated or can be controlled by computer. Bridge-pushing-in projects made by us:
• Pentele Bridge or M8 Danube Bridge, on M8 motorway at Dunaújváros

1063 m – 5500 tons
• viaduct of the M6 motorway at Szebény

960 m – 4800 tons


During the widening works of the M0 motorway our duty was to move the metal construction of the river and flood bridge parts into their place onto 8 piers by synchronizing the pushing-in cycles and speeds of the 8 pushing-in mechanisms.
We have designed and manufactured the hydraulic system for the axial and vertical movement of the previously assembled metal construction and directed the axial pushing-in process.

Hydraulic power unit for lifting bridge steel construction into place


We have designed and manufactured the hydraulic power unit installed on tows for lifting-in bridges into their place.

Bridges lifted-in by us:
• Pentele Bridge or M8 Danube Bridge, on M8 motorway at Dunaújváros

330 m - 9400 tons
• North Rail Bridge over the Danube at Budapest
• Megyer Bridge over the Danube at Budapest on M0 motorway

120 m - 880 tons 


Viaduct of the M6 motorway at Szebény

960 m – 4800 tons