A powder sample is obtained from hardened concrete by drilling or grinding (Profile Grinder) or obtained from the fresh concrete. The sample is mixed with a specific amount of extraction liquid that is designed to remove disturbing ions, such as sulfide ions, and to extract the chloride ions in the sample. After 5 minutes, a chloride ion selective electrode is submerged into the solution to determine the amount of chloride ion by means of a calibrated chart, which is expressed as percentage of concrete mass.
Two methods can be used: The RCT (Rapid Chloride Test) is used to determine the amount of acid-soluble chlorides. The RCTW (Rapid Chloride Test Water) is used to determine the amount of water-soluble chlorides.
The test results can be used for:
- Establishing the chloride ion profile for service life estimation
- Establishing the depth of removal of a chloride ion contaminated surface layer
- Diagnosing a structure for corrosion activity, in combination with other test systems such the Mini Great Dane, the GalvaPulse and the Deep Purple or Rainbow Indicators
- Monitoring the chloride ion content during electrochemical removal of chlorides
- Measuring the chloride ion content of fresh concrete or its constituents.
- Input Impedance: 1,012 Ohm
- Battery Type / Life: 1 x 9V / approx. 150 hours
- Auto-off after 20 minutes of non-use
- Environment: 0 to 50°C; RH max 95%
- Temperature and pH measuring capacity (pH electrode and temperature probe are sold separately)
- AASHTO T 260: “Standard Method of Test for Sampling and Testing for Chloride Ion in Concrete and Concrete Raw Materials”
- ASTM C114: “Standard Test Methods for Chemical Analysis of Hydraulic Cement”
- ASTM C1152: Standard Test Method for Acid-Soluble Chloride in Mortar and Concrete
- ASTM C1218: Standard Test Method for Water-Soluble Chloride in Mortar and Concrete
- EN 14629: “Products and systems for protection and repair of concrete structures – Test methods – Determination of chloride content in cured concrete”