Research Report RR:D18-1011
An interlaboratory study was conducted by laboratories which tested soil samples to establish a precision statement for specifications D4253 and D4254.
D4254-00(2006)e1 Standard Test Methods for Minimum Index Density and Unit Weight of Soils and Calculation of Relative Density
D4253-00(2006) Standard Test Methods for Maximum Index Density and Unit Weight of Soils Using a Vibratory Table
Committee D18 on Soil and Rock
Subcommittee D18.03 on Texture, Plasticity and Density Characteristics of Soils