Technical
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. The 007 James Bond Tester™ involves bonding a circular steel disc to the surface by means of an epoxy resin adhesive. A controlled tensile force is then applied to the disc and failure will occur at the weakest point: either in the host material, or in the bond between overlay and host material. Knowing the surface area of the disc and the force applied at failure, the tensile strength of the host material or bond can be calculated.