Standard Method of Test for
Correction for Coarse Particles in the Soil
AASHTO Designation: T 224-01 (2004)
1.1.This method describes a procedure for adjusting the densities of soil and soil aggregate mixtures to compensate for differing percentages of coarse particles retained on either the 4.75-mrn (No. 4) or 19.0-mrn (314-in.) sieve.
This is necessary to adjust either the field wet density to a dry density of the material passing these sieves or the reverse, by adjusting the lab density to the field density when doing compaction control testing.
Comparisons are made by comparing the field densities with the maximum dry density as determined by T 99 or T 180.
1.2.Two methods are available for correction, either, lab to field or field to lab density.
The method specified in Section 4.1 adjusts the compacted lab density to the field density.
The method specified in Section 4.2 adjusts the field wet density to dry density of the fine fraction and compares its results with the compacted lab density.
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