- Report #: NT BUILD 357
- Approved: September 1989
The resistance against CO2-penetration through concrete repairing materials and concrete protective coating is determined by an accelerated laboratory test on laboratory prepared samples by exposing the samples to carbon dioxide enriched air in order to evaluate the effect of concrete repairing materials. The depth of CO2-penetration is measured by the phenolphthalein method.
This method specifies an accelerated laboratory test procedure in which the resistance against CO2-penetration through concrete repairing materials or concrete protective coating can be determined in order to evaluate the effect of concrete repairing materials. It consists of monitoring the rate of carbonation of specimens exposed to an atmosphere of 3 % carbon dioxide and 55 – 65 % relative humidity.
FIELD OF APPLICATION
The method can be used to compare both concrete, mortar or concrete protective coatings.
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