Chloride Field Test System
A Chloride Laboratory in a Briefcase for Wet or Dry Concrete
Features for the Chloride Field Test System
- Fast---Results within minutes at the site.
- Economical---Low coat per sample compared to laboratory testing.
- Accurate---- Results are comparable to laboratory testing.
- Covers wide range from 0.002% to 2% chloride by weight.
- Automatic compensation for changes in ambient temperature.
- Digital display for direct reading of lbs/cu. yd. and percentage of chloride by weight.
- Correlates to ASTM C114 and meter conforms to AASHTO-T260.
Technical Specifications of the Chloride Field Test System
The determination of the chloride ion concentration in concrete is essential in assessing the need for maintenance on, for example, bridge decks and parking structures. The test can also be used to ensure that materials used in new construction are free from potentially harmful chloride ion levels.
With this method, the concentration of acid soluble chlorides is measured. In most cases, this is equivalent to total chloride concentration.
A sample of powder is obtained by drilling and careful quartering. Then an accurately weighed 3 gr(0.1 oz) sample is dissolved in 20ml(0.67 fl oz) of extraction liquid which consists of a precise, measured concentration of acid. For sampling wet concrete a 3 gr (0.1 oz)sample of mortar(i.e. without coarse aggregate) is used.
The chloride ion reacts with the acid of the extraction liquid in an electrochemical reaction. An electrode, with integral temperature sensor, is insured into the liquid and the electrochemical reaction measured. A uniquely designed instrument converts the voltage generated by the chloride concentration. The instrument automatically applies the temperature correction and correlates to ASTM C114. It shows the chloride concentration on an LCD display in either lbs per cu. Yd. or percentage by weight.
To avoid contamination, the electrode should be thoroughly washed with deionizer Water after each test. Replacement packs, containing twelve bottles of extraction liquid each for one time use, are available. Five calibration liquids each with known concentrations are supplied with each pack. These liquids are used to establish the Calibration curve, and to check that the system is functioning correctly. Calibration is not required for each use and the instrument will indicate when calibration is required. The calibration Liquids are colored to avoid confusion between then and with the extraction liquid.
All equipment necessary to complete the chloride test is supplies in standard size carrying case.