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2 TEST PROCEDURE
2.1 SCORE THE COATING
Scoring of the coating down to, or just into, the surface of the concrete may be required by standard test
methods.
To score coatings thicker than 0.5 mm (20 mils) use a diamond tipped core bit with an internal diameter of
50.8 mm (2") mounted in a drill press or hand drill. Ensure that the scoring is normal (perpendicular) to the
coating and that the test area is not subjected to twisting or torque. To minimise heat and suppress dust,
water lubrication may be required.
To score coatings thinner than 0.5 mm (20 mils), a sharp knife may be sufficient to score around the dolly
once it has been secured in place by adhesive.
2.2 SECURE THE DOLLY
The surface of the dolly and the test area should be abraded and be free from oil, moisture and dust to
ensure a good bond between the dolly face and the coating.
1.
Prepare the surface of the dolly and the coating where the dolly is to be applied by roughening with an
abrasive paper. Then de-grease these areas by using a suitable solvent to clean both surfaces.
2.
Mix a small quantity of adhesive and apply an even film to the prepared surface of the dolly.
3.
Place the dolly onto the prepared test surface and apply pressure to squeeze out excess adhesive
which should then be removed. Allow the adhesive to cure for the recommended time - see
“Adhesives” on page 6.
Dollies can be re-used after cleaning. Additional dollies are available from your local Elcometer supplier or
direct from Elcometer - see “Spares” on page 10.
