Evident Ultrasonic Inspection Equipment
New Product Release - The James Bond Test ™ MK IV
By: Michael Hoag
The James Bond Tester™ MK IV or pull off adhesion test measures the bond strength or tensile strength of concrete, asphalt, tile, concrete repair, or other overlay material by the direct tension or pull off method. By pulling a 50 mm (2 inch) steel disk attached to the material under the unit can,

* Measure the near surface strength of a substrate in order to determine the substrates quality before applying an overlay

* Determine the bond strength of a repair or overlay material after it is applied to the substrate

* Determine the tensile strength of a repair, overlay or adhesive after the material is applied to the surface.

The James Bond Tester™ MK IV involves bonding a circular steel disk to the surface by means of an epoxy resin adhesive. A controlled tensile force is then applied to the disk and failure will occur at the weakest point: either in the host material, or in the bond between overlay and host material. Adequate direct tensile strength between two layers is important if repairs to concrete structures or additional overlays on existing concrete are to be structurally sound.
Mistras Group