Once the impermeability performance is compromised, water and harmful chemicals from the external environment will enter the interior of the concrete, causing further corrosion of the concrete matrix and leading to steel corrosion, significantly reducing durability.
With the continuous accumulation and expansion of rust products, micro cracks and surface peeling will appear in the internal structure of concrete, causing structural damage and severe damage to the overall stability of the building system.
In chloride environments, the service life of concrete structures is generally 30-40 years, with the shortest being less than 10 years.
Even worse, in environments with high salt concentrations, some concrete structures that have been in use for less than a year have to be repaired.
Therefore, in order to extend the service life of buildings, research on the impermeability performance of concrete cannot be ignored.
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