EN 15275:2007 – Structural adhesives – Characterisation of anaerobic adhesives for co-axial metallic assembly in building and civil engineering structures

Indicative performance requirements are given in Annex A depending on the intended use. These values are drawn from laboratory and practical experience and can be considered to indicate satisfactory performance under normal practical use and conditions. The torque strength of anaerobic adhesives on threaded fasteners is expressed as breakloose torque measured on assemblies preloaded with an input torque of 5 Nm.
Also, identical input torque is assumed to be applied to the specimens when measuring the prevailing torque. Attention shall be drawn to the fact, that shear strength properties measured in accordance with EN 15337 and EN ISO 10964 are valid for low-carbon respectively zinc-phosphated steel substrate materials. In general, curing of anaerobic adhesives may be significantly affected by the nature of the used adherends, thus testing using the specific materials of the intended application is recommended.
It is also recommended to evaluate heat resistance or durability of the intended joint under conditions reflecting the environmental loading expected to encounter in practice.
5 Test methods The test methods could be divided according to the type of the application, and the properties relevant to meet the requirements by the joint as follows:
5.1 Retaining co-axial assemblies
5.1.1 Static shear strength The static shear strength expresses the bond strength of an adhesive joint formed between a metal pin and a metal collar measured as compressive force required to push out the pin from the collar at constant crosshead speed according to EN 15337. The test method is primarily to be used for the determination of the shear strength capability of retaining metallic co-axial joints such as tubular lap joints or pin-and-collar type joints.
NOTE The test method can be also used to determine the shear strength of threaded fasteners. However, in this case it is recommended to assess the bond ability of the threaded assembly by means of the torque strength according to EN ISO 10964.
5.1.2 Durability Durability is expressed as retention of the static shear strength measured in accordance with EN 15337 after 1 000 h exposure to 100 °C and if required to 150 °C.
NOTE If required durability can be assessed at other specified environmental conditions in accordance with EN 15337.
5.1.3 Heat resistance To assess the heat resistance of an anaerobic adhesive measurement of the static shear strength in accordance with EN 15337 shall be conducted at 100 °C or at a particular, elevated temperature.
EN 15275:2007 – Structural adhesives – Characterisation of anaerobic adhesives for co-axial metallic assembly in building and civil engineering structures