Abstract: In the method for operating a movable compaction device during material compaction work, moisture content of the material to be compacted is monitored. The method comprises steps of defining a compaction performance index for the material to be compacted, said compaction performance index being an electromagnetic character correlating with volumetric moisture content of the material, determining the compaction performance index value in a number of survey points of the material to be compacted during compaction work using electromagnetic measurement device, and controlling operation on the compaction device based on determined compaction performance index values.

Abstract: Method for detecting cracks in a road pavement by using a ground penetrating radar installed to a vehicle, the method comprises driving the vehicle along the road, scanning sections of the road, which scanned sections comprise at least one wheelpath area and at least one non-wheelpath area. The scanning includes transmitting electromagnetic pulses to the road, receiving reflected electromagnetic signals from the road, recording the received electromagnetic signals to a digital storage file and analysing the received electromagnetic signals. Analysing includes monitoring a selected high frequency range of the received signals over a selected monitoring interval, determining the spectral density of the received signals, calculating the differences of spectral densities of the wheelpath area and the non-wheelpath area and evaluating the presence of microcracks in wheelpath area based on the calculated differences in spectral densities. The monitored high frequency range is preferably of 3-4 GHz.

Abstract: Method for detecting cracks in a road pavement by using a ground penetrating radar installed to a vehicle, the method comprises driving the vehicle along the road, scanning sections of the road, which scanned sections comprise at least one wheelpath area and at least one non-wheelpath area. The scanning includes transmitting electromagnetic pulses to the road, receiving reflected electromagnetic signals from the road, recording the received electromagnetic signals to a digital storage file and analysing the received electromagnetic signals. Analysing includes monitoring a selected high frequency range of the received signals over a selected monitoring interval, determining the spectral density of the received signals, calculating the differences of spectral densities of the wheelpath area and the non-wheelpath area and evaluating the presence of microcracks in wheelpath area based on the calculated differences in spectral densities. The monitored high frequency range is preferably of 3-4 GHz.

Abstract: In the method for operating a movable compaction device (10) during material compaction work the moisture content of the material to be compacted is monitored. The method comprises the steps of defining a compaction performance index for the material (100) to be compacted, said compaction performance index being an electromagnetic character correlating with the volumetric moisture content of the material, determining the compaction performance index value in a number of survey points of the material to be compacted during compaction work using electromagnetic measurement device and controlling the operation on the compaction device based on determined compaction performance index values.