Silver nitrate colorimetric method to detect chloride penetration in carbonated concrete: How to prevent false positives

The sprayed silver nitrate (AgNO3) solution colorimetric method allows identifying chloride ion presence in concrete. However, this method gives false positive results in carbonated concrete structures. This work aims to help develop a technique that restrains carbonation interference in silver nitrate solution spraying for detecting chloride ions in reinforced concrete. Calcium hydroxide and sodium hydroxide solutions were applied to raise...