Describes practices for reducing field or laboratory samples of aggregate to a convenient size for testing, while limiting bias and loss of fines so that test portions remain representative of the bulk sample.
ASTM C702/C702M
Revision: 2024
Sample preparation
Standard practice for reducing samples of aggregate to testing size
Describes practices for reducing field or laboratory samples of aggregate to a convenient size for testing, while limiting bias and loss of fines so that test portions remain representative of the bulk sample.
Test method
Covers mechanical splitter, quartering, and miniature stockpile procedures (and conditions under which each applies) so that reduced portions are suitable for subsequent physical and chemical aggregate tests.
Specimen requirements
Initial sample mass and moisture condition shall meet the requirements of the sampling practice and the test methods to be run; reduction equipment and surfaces must be clean to avoid contamination between samples.
Compatible equipment
ASTM C702/C702M is commonly referenced where laboratory jaw crushing, splitting, and sieving form part of the same aggregate or construction-materials sample-prep chain before standardized tests.