How to deal with the corrosion of steel bars in seaside buildings and what concrete should be used?

According to the different indoor and outdoor environments, concrete structures are divided into four categories, namely 1, 2, 3 and 4. Under normal use conditions, the category is 1, and the worse the environment such as chloride ion, salt and humidity in the air, the higher the category.

The general measures are as follows: adding rust inhibitor to concrete can effectively prevent steel bars from rusting. In addition, concrete additives such as fly ash are added to improve the compactness of concrete to resist the corrosion of steel bars.