Device for checking the compaction for vibration compaction devices

Abstract

A device for checking the compaction, in particular, of black top pavement in street and roadway construction, using a vibration roller drum that is provided with a compaction checking device is provided. In the compaction of black top pavement, the measurement methods of the dynamic ground rigidity, known from ground compaction, for determining the condition of compaction that has been achieved, can not be used since the asphalt rigidity varies between two measurements with the temperature and in addition, the underground rigidity is measured with it proportionately. In order to solve these problems, a second vibration roller drum is provided which has a second compaction checking device, whereby the second vibration roller drum is coupled to the first vibration roller drum essentially following it in the same track. In this way, for the comparison of the values determined, the temperature dependence of the measurement values determined is eliminated. Furthermore, an evaluation unit is present, which compares the measurement results of the two compaction checking devices. In this way, the underground rigidity is eliminated in the measurement values.

Dependencies are inferred from the claim text.