SYMPOSIA PAPER Published: 01 January 1970

A Direct Method for Plotting Grain Size Curves from Hydrometer Test Data


This report describes a method by which the time required to draw a grain size curve from hydrometer test data is reduced from approx 20 min to less than 5 min per sample. Briefly, this method consists of the plotting of elapsed time and uncorrected hydrometer readings directly onto a grain size graph by the use of a transparent grid mounted on a tracing table. The construction of the grid is described. Because accepted methods of computation are used throughout, no approximations are introduced.

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Dick, RC
Caseco Consultants Limited, Vancouver, B. C.
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Developed by Committee: D18
Pages: 126–132
DOI: 10.1520/STP38492S
ISBN-EB: 978-0-8031-5570-1
ISBN-13: 978-0-8031-0051-0