Lab Services: Aggregate testing

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Test Method Title

Standard Test Methods for Uncompacted Void Content of Fine Aggregate (as Influenced by Particle Shape, Surface Texture, and Grading)

Reference Number

ASTM C1252

Material

Aggregate

Test Property

Void Content

Description of Test

A nominal 100-mL calibrated cylindrical measure is filled with fine aggregate of prescribed grading by allowing the sample to flow through a funnel from a fixed height into the measure. The fine aggregate is struck off and its mass is determined by weighing. Uncompacted void content is calculated as the difference between the volume of the cylindrical measure and the absolute volume of the fine aggregate collected in the measure. Uncompacted void content is calculated using the bulk dry specific gravity of the fine aggregate. Two runs are made on each sample and the results are averaged. For a graded sample (Test Method A or Test Method C) the percent void content is determined directly, and the average value from two runs is reported. For the individual size fractions (Test Method B), the mean percent void content is calculated using the results from tests of each of the three individual size fractions.

Preferred Test Sample Size

Number of Test Specimens

2

Test Specimen Size

190 g

Keywords

void, content, angularity, particle shape, surface texture