RCT/RCTW

Portable kit to accurate and immediate determination of chloride ion content in concrete powder samples.

Description

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.

Application

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.

Specification

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).
Range: ±1,999 mV
Resolution: 0.1 mV for ±700 mV and 1 mV for ±2,000 mV
Accuracy: 0.2 mV for ±700 mV and 1 mV for ±2,000 mV

Standards

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”.

Part List

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