![]() ![]() ![]() Reference standard: UNI EN 12504-1 and UNI EN 11747. Therefore the depth of chloride ion penetration is quantified to define the line of separation between the penetrated area and the area that is not yet contaminated by ions. This method of investigation is used to quantify the spread of chloride ions within the structural element of concrete. The test consists of spraying a 1% phenolphthalein solution in ethyl alcohol on a portion of the structure under investigation, to detect any lowering of the pH level, which if greater than minimum bar cover thickness, would result in oxidation phenomena in the reinforcement structure.ĭetermining the penetration profile of chloride ions in concrete Normally the pH value of concrete is close to 13, so as to avoid oxidation phenomena in the reinforcement structure contained within. The test can be carried out on core samples or on site, by chiselling the structure under investigation. The test is used to determine the depth of carbonation, starting from the surface layers of concrete.
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