Paper by LEFEBVRE from ISCR 6th 1990
Generally due to an unsufficient vibration, the concrete around the construction joints may contain cavities, especially under the reinforcement. When very hot weather conditions prevail, these deficiencies may cause important deteriorations, possibly with mere fragmentation of the concrete around the joint. As there are over 5.000 construction joints on the Belgian road network, a fast and reliable method for detection of the defective joints had to be conceived. A technically suitable repair method, with a minimum of discomfort for the road-users had to be worked out.