ASTM C1524 − 02a Reapproved 2010 Standard Test Method for Water-Extractable Chloride in Aggregate Soxhlet Method

ASTM C1524 − 02a Reapproved 2010 Standard Test Method for Water-Extractable Chloride in Aggregate Soxhlet Method

Scope

1.1 This test method provides procedures for sampling and analysis of aggregate for water-extractable chloride using a Soxhlet extractor.

NOTE 1—This test method is to be used when significantly high chloride content has been found in aggregates, concretes, or mortars.

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

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use.

It is the responsibility of the user of this standard to establish appropriate safety and health practices and

determine the applicability of regulatory limitations prior to use.

ASTM C1524 − 02a Reapproved 2010 Standard Test Method for Water-Extractable Chloride in Aggregate Soxhlet Method

Significance and Use
3.1 Water-extractable chloride, when present in sufficient amount, has a potential to initiate or accelerate

corrosion of metals, such as steel, embedded in or contacting a cementitious system, such as mortar, grout, or

concrete.

This test method is applicable when aggregates contain a high background of naturally occurring chloride (see ACI 222.1–96).

Test Method C1152/C1152M determines acid-soluble chloride and Test Method C1218/C1218M determines water-soluble chloride.

Both Test Methods C1152/C1152M and C1218/C1218M pulverize the sample to a fine powder or fine granular material.

The Soxhlet method is intended to use Non pulverized material. Results with some aggregates have shown that.

the Soxhlet procedure extracts an extremely low amount of chloride, with most of it remaining in the rock, and

therefore, it is not available for corrosion.