CGRG Bibliography of Canadian Geomorphology
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Author : Fransham, P.B., Unrau, J.D., and Reesor, S.N.
Date : 1982.
Title : Field and laboratory acoustic testing of frozen soils
Publication : Proceedings, Fourth Canadian Permafrost Conference, 2-6 March 1981, Calgary, Alberta. Edited by H.M. French. National Research Council of Canada, Ottawa.
Issue :
Page(s) : 274-282.
Abstract
Research was undertaken to investigate the compressional wave velocities in frozen soils. Samples were obtained during two consecutive field seasons from Illisarvik lake, N.W.T. Compressional wave velocities were measured on cores in the field using portable ultrasonic testing equipment. Velocity measurements were made at a single temperature and, hence, yielded a single point on a velocity versus temperature curve. Grain-size and moisture content tests serve as a base for interpreting wave velocities. Velocities obtained from field surveys show a strong correlation with those obtained from laboratory measurements. This suggests that one should be able to differentiate ice-rich from ice-poor zones, and, hence, obtain an impression of the spatial distribution of the ground ice. Compressional wave velocities have also been measured on a series of kaolinite and sand mixtures. Kaolinite to silica sand mixtures were made in the following ratios; 1.0, .75, .50, .25, and 0. Water contents ranged from 3 to 45 percent. The samples were compacted using the modified Proctor method. The results show a strong dependence of velocity on moisture content, the proportion of sand to clay, and the bulk density.
Bibliography of Canadian Geomorphology