Document Type

Geomechanics and geotechnical engineering paper

Publication details

Bahadori, A 2014, 'Estimation of soil particles size in hydrometer analysis test using a simple correlation', in ST Smith (ed.), 23rd Australasian Conference on the Mechanics of Structures and Materials (ACMSM23), vol. II, Byron Bay, NSW, 9-12 December, Southern Cross University, Lismore, NSW, pp. 757-761. ISBN: 9780994152008.

Peer Reviewed



Soil consists of an assembly of ultimate particles of various shapes and sizes. Hydrometer Analysis is based on the principle of sedimentation of soil grain in water. It is usually performed if the grain sizes are too small for sieve analysis. The method is based on Stoke’s law governing the rate of sedimentation of particles suspended in water. In this article a simple predictive tool is developed to estimate diameter of soil particles as a function of specific gravity of soil solids and temperature. Estimations are found to be in excellent agreement with reported data. The tool developed in this study can be of immense practical value for geotechnical engineers to have a quick check of diameter of soil grain for various soils at wide range of conditions without opting for any experimental trials. In particular, soil mechanics practitioners and civil engineers would find the proposed approach to be user-friendly with transparent calculations involving no complex expressions.