Scope
This European Standard specifies a method for testing adhesion and perceptible changes in the coating during
reverse side water action. The test covers situations such as:
coating of young,water saturated,surface dry concrete (e.g.coating after 7 days);
coating of old but water saturated, surface dry concrete;
coated concrete with moisture from behind (without additional hydrostatic pressure), causing an aikaline attack
to the coating.
2
Normative references
This European Standard incorporates by dated or undated reference,provisions from other publications.These
normative references are cited at the appropriate places in the text and the publications are listed hereafter.F
dated references,subsequent amendments to or revisions of any of these publications apply to this European
Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the
publication referred to applies (including amendments).
EN 1766.Products and systems for the protection and repair of concrete structures- Test methods - Reference
concretes for testing.
EN 1542, Products and systems for the protection and repair of concrete structures --Test methods - Measurement
of bond strength by pull-off.
EN ISO 1513,Paints and varnishes - Examination and preparation of samples for testing (ISO 1513:1992).
EN ISO 15528, Paints, varnishes and raw materials for paints and varnishes - Sampling (ISO 15528:2000).
ISO 4628-1,Paints and varnishes - Evaluation of degradation of coatings -Designation of quantity and size of
defects, and of intensity of uniform changes in appearance - -Part 1.General introduction and designation system.
ISO 4628-2,Paints and varnishes - Evaluation of degradation of coatings - Designation of quantity and size of
defects, and of intensity of uniform changes in appearance - Part 2: Assessment of degree of blistering.
ISO 4628-5,Paints and varnishes-Evaluation of degradation of coatings-Designation of quantity and size of
defects, and of intensity of uniform changes in appearance - Part 5: Assessment of degree of flaking.
3
Principle
Water saturated, surface dry concrete slabs which have been treated with a coating on one face have the uncoated
faces exposed to water.A pull-off test and examination for peeling.blistering and discolouration are used to
determine changes in the performance of the coating in comparison to a coating on dry concrete.
4
Apparatus
4.1 Laboratory
Maintained at the required temperature within ± 2 °C and the required relative humidity within± 10 %.
4.2 Usual accessories
To apply the coating material to the concrete substrate.

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