The maximum limit of chloride content in reinforced concrete is 0.6 kg/m3.

Chloride ions are highly corrosive to the steel reinforcement in concrete. When chloride ions come into contact with the steel, they can initiate a chemical reaction called corrosion. This corrosion process can lead to the deterioration of the steel, which weakens the structure and reduces its service life.

To prevent corrosion of the reinforcement, it is important to limit the amount of chloride ions that can penetrate the concrete. Various standards and codes specify the maximum allowable chloride content in concrete, depending on the exposure conditions.

The maximum limit of chloride content in reinforced concrete is typically expressed in terms of the mass of chloride ions per unit volume of concrete (kg/m3). This limit is based on the chloride threshold concentration, which is the concentration below which corrosion is unlikely to occur.

The maximum limit of 0.6 kg/m3 is commonly used for reinforced concrete exposed to moderate levels of chloride ions. This includes structures in coastal areas or those in contact with deicing salts. It is important to note that this limit may vary depending on the specific design requirements and the exposure conditions of the structure.

By setting a maximum limit for chloride content, engineers can ensure that the concrete will have adequate protection against corrosion and maintain its durability over time. This helps to extend the service life of the structure and reduce the need for costly repairs or replacements.

In conclusion, the maximum limit of chloride content in reinforced concrete is 0.6 kg/m3. This limit is set to protect the steel reinforcement from corrosion and ensure the long-term durability of the concrete structure.