Evaluate the bond strength (adhesion) of a coating (e.g. screed, resin or coating) from a rigid substrate such as a concrete or metal floor.
Testing can be in accordance with the British and European standard BS EN 13892-8:2002, BS8204-6:2008+A1:2010 or BS EN1542:1999 and also the American standard ASTM D7234.
The bond strength is determined as the failure tensile stress applied by a direct load perpendicular to the bond area. The bond strength is calculated as the quotient between the failure load and the test area. The test area is defined by coring through the screed or topping into the substrate.
See our relative Screed testing services in action, including Humidity Tests, Drop testing and our Pull Off Tests:.
Testing is carried out as follows
e.g. Cohesive failure in the concrete substrate, failure between the substrate and the screed, cohesive failure in the screed, failure between the adhesive layer and the pull-head plate.
An adhesion tester evaluates the pull off strength (adhesion) of a coating (e.g. screed or topping) from a rigid substrate such as a concrete or metal floor.
Bond strength being tested on site by Face engineer with an Adhesion / pull off tester.
Example of completed test. Test result – 100% Cohesive failure in concrete substrate
Please contact us if you have any questions about our floor testing or design & consultancy services.
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