Determination of Moisture Content and Liquid Limit of Foundations Soils, using Microwave Radiation, in the Different Locations of Sulaimani Governorate, Kurdistan Region-Iraq

Authors: Heyam Daod

Abstract:

Soils are normally dried in either a convection oven or stove. Laboratory moisture content testing indicated that the typical drying durations for a convection oven were, 24 hours. The purpose of this study was to determine the accuracy and soil drying duration of both, moisture content and liquid limit using microwave radiation. The soils were tested with both, convection and microwave ovens. The convection oven was considered to produce the true values for both, natural moisture content and liquid limit of soils; it was, therefore, used as a basis for comparison for the results of the microwave ovens. The samples used in this study were obtained from different projects of Consulting Engineering Bureau of College of Engineering of Sulaimani University. These samples were collected from different locations and at the different depths and consist mostly of brown and light brown clay and silty clay. A total of 102 samples were prepared. 26 of them were tested for natural moisture determination, while the other 76 were used for liquid limits determination

Keywords: Fine-grained soils, liquid limit, microwave drying,

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1334087

References:

[1] ASTM D 4642-87, "Standard Test Method for Determination of Water Moisture Content of Soil by the Microwave Oven Method", 1987
[2] Gilbert, P. A., "Evaluation of soil mechanics laboratory equipment, Report 13, feasibility study, microwave oven used for rapid determination of soil water contents". Misc Paper No. 3-478. U.S. Army Engineer Waterways Experiment Station, Vicksbury, MS, 1974
[3] Hagerty, D. J. et al., "Microwave drying of soils. Geotechnical Testing". Journal, Vol. 13, No. 2, p. 138-141, 1990
[4] He, X. Y., "Theory and application of microwaves". Science Monthly, Vol. 292, Science Monthly and King-Taiwan Information Technology Inc., 1994
[5] Lade, P. V. and Nejadi-Babadai H., "Soil drying by microwave oven. Soil specimen preparation for laboratory testing". ASTM STP 599. ASTM, Philadelphia, p. 320-335, 1975
[6] Miller, R. J. et al., "Soil water content microwave oven method". Soil Science Society of America Proceedings, Vol. 38, No. 3, p. 535-537, 1974
[7] Philip W. K. Chung and Tony Y. K. Ho, "Study on the determination of moisture content of soils by microwave oven method". Geo Report no. 221, Geotechnical Engineering Office, Hong Kong, 2008
[8] Ryley, M. D., "The use of a microwave oven for the rapid determination of moisture content of soils". RLR Report LR280. Road Research Laboratory, Crowthorne, England, 1969