Figure 15-32.-Data sheet for sieve analysis with prewashing.
calculated from Stoke’s equation using corrected
SPECIFIC GRAVITY TESTING
hydrometer reading and a nomographic chart.
The procedures used to perform- the hydro-
The specific gravity of a solid substance is the
meter analysis are not discussed in this TRAMAN
ratio of the weight of the solid to the weight of
but are contained in ASTM D 422.
an equal volume of water. In dealing with soils,
15-25
