ASTM C1760 − 12 Standard Test Method for Bulk Electrical Conductivity of Hardened Concrete

ASTM C1760 − 12 Standard Test Method for Bulk Electrical Conductivity of Hardened Concrete

Scope
1.1 This test method covers the determination of the bulk electrical conductivity of saturated specimens of hardened concrete to provide a rapid indication of the concrete’s resistance to the penetration of chloride ions by diffusion (See Note 1).

The results of this test method can be related to the apparent chloride diffusion coefficient that is determined using Test Method C1556.

NOTE 1—The term “bulk” is used because the electrical conductivity is determined by measuring the current passing through all the phases of a test specimen (e.g., cement paste, sand, aggregate).

This is accomplished using electrodes that cover the ends of the specimen. Other test methods that measure conductivity may use probes placed on the side surface of the specimen.

1.2 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

ASTM C1760 − 12 Standard Test Method for Bulk Electrical Conductivity of Hardened Concrete

Significance and Use

5.1 This test method measures the bulk electrical conductivity of concrete, which has a theoretical relationship to the diffusion coefficient of chloride ion, or other ions, in the concrete (1, 2).

Experimental data confirm that there is a correlation between the apparent chloride diffusion coefficient measured by Test Method C1556, or similar method, and the bulk electrical conductivity (3, 4).