Under certain environmental conditions, the materials may demonstrate efflorescence, that is, the presence of whitish and crystalline deposits caused by calcium carbonate.
This is a natural phenomenon, not preventable, which can be eliminated naturally with the rain or with the use of the pavement itself.
Indeed, efflorescence is the result of very thin calcium carbonate deposits that have a limited duration over time and that, when wet, seem to disappear. This phenomenon occurs mainly in certain humidity and temperature conditions, especially during the cold season when concrete curing times are longer.
The use of the pavement and certain weather conditions, such as wind and rain, degrade and remove these whitish deposits, eliminating the efflorescence effect naturally. As a result of the exposure of the pavement to weathering and its use, these deposits simply disappear. Therefore, no action is needed to remove the pieces showing this phenomenon.