BOND TEST OF CONCRETE AND OVERLAYS

The Bond-Test system developed in Denmark is presented. A testing case illustrates its use compared to incorrect testing of the adhesion strength. A finite element analysis is applied for a normal and a high strength concrete to compare the theoretical uniaxial tensile strength with the strength measured by the Bond-Test performed at the surface and with a drill depth of the partial coring at 75 mm. The effect of the drill depth is further investigated in an experimental program for two types of concrete mixes. The Bond-Tests are compared to tensile strength of drilled-out cores and to compressive strength measured by the Lok-Test and the Capo-Test. The results are compared to other experimental findings. (A) For the covering abstract see IRRD 861706.