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Carbonation Test

Concrete carbonation is one of the major reasons for corrosion of concrete structures. It is a process by which carbon dioxide from the surrounding air reacts with calcium hydroxide in the concrete to produce calcium carbonates.  Carbonation test is used to provide means to determine the extent of carbon dioxide infiltration into the concrete.

Carbonation tests are carried out in-situ on freshly drilled core samples and on freshly broken surface in hacking area in accordance with BS EN 14630 : 2006 using an alcohol solution of phenolphthalein. The phenolphthalein solution was sprayed on the concrete surface and measured the distance from the exposed surface to the pink coloured zone to an accuracy of ±1mm.