ASTM C123/C123M 14 Standard Test Method for Lightweight Particles in Aggregate

Significance and Use of ASTM C123/C123M 14 Standard Test Method for Lightweight Particles in Aggregate

4.1 This test method is used to determine conformance with provisions of Specification C33 pertaining to the

amount of lightweight material in fine and coarse aggregates.

A heavy liquid with a specific gravity of 2.0 is used to separate particles which may be classified as coal or lignite.

Heavier liquids are to be used to check the percentages of other lightweight particles such as chert and shale having a specific gravity less than 2.40.

4.2 The test method is useful in identifying porous aggregate particles in research activities or in petrographic analyses.

Scope of ASTM C123/C123M 14 Standard Test Method for Lightweight Particles in Aggregate

1.1 This test method covers the determination of the percentage of lightweight particles in aggregate by means of sink-float separation in a heavy liquid of suitable specific gravity.

1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard.

The values stated in each system may not be exact equivalents; therefore, each system shall be used

independently of the other.

Combining values from the two systems may result in non-conformance with the standard.

Some values have only SI units because the inch-pound equivalents are not used in the practice.