Lab Services: Aggregate testing

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Test Method Title

Test Method for Clay Lumps and Friable Particles in Aggregates

Reference Number

ASTM C142

Material

Aggregate

Test Property

Deleterious materials, clay lumps, friable particles

Description of Test

The dry aggregate sample is separated into a series of particle size fractions (e.g., 3/8" to 3/4"). Each fraction is covered with water for about 24-hours. The particles are then individually rolled and squeezed between the thumb and forefinger in an attempt to break the particles. The particles are then washed, dried and weighed. The percent loss is recorded as the amount of clay lumps and friable particles.

Preferred Test Sample Size

25 kg (one full 5-gallon pail)

Number of Test Specimens

1

Test Specimen Size

11kg

Keywords

Deleterious, Clay Lumps, Friable Particles