To test the mechanical quality of plasters and tiling (plasters, mortars, paints, roughcast, waterproofing plasters, ...) on various supports (concrete, stone, brick, wood, metal, ...) used in the Building Trade, Civil Engineering and Industry, adherence test devices designed and perfected by the CEBTP are usually employed.

The test consist of exerting a tractive force on the male ball-joint, normal to the surface of the disc.This give the adherence value (in daN) of the plaster on its support, if the break occurs along the contact plane.

It may happen that the break occurs either in the plaster, in the support, or partly in the contact plane and partly in the plaster or the support.

In the first two cases, the value obtained characterises the strength of the plaster or the support; in the last case, the value obtained has no precise meaning, but it indicates that the tensile strength of the plaster or the support is of the same order as the adherence and gives an average value.

In all cases, the value obtained represents, however, a minimum adherence value.

The main part of this device is a metal dynamometer fixed on a circular plate made of light alloy.
By turning the central axis with the handles, an axial traction is exerted on the male ball-joint screwed onto the disc.
The dynamometer is therefore compressed, the reaction to this force taken by the three feet fixed underneath the circular plate.

- Aluminium circular discs Ø 20 - Ø 30 - Ø 50 - Ø 60 - Ø 112.84 mm
- Square aluminium discs of 50 or 100 mm
- Carbide trepan Ø 20 mm or Ø 50 mm
- Distribution plate
- Electronic ratemeter
- Special accessories according to needs (tests on attachments, plugs, screws, ...)
- Light alloy telescopic support to hold the device when it used on vertical walls or uncomfortable positions

In compliance with following standards:

- EN 24-624
- EN 1542
- NF T30-606
- NF T30-062
- NF P18-852
- NF P18-853
- NF P84-404-1
- NF P98-282
- NF P EN 1348
- NF EN 13892-8
- DTU 54.1