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http://dx.doi.org/10.7843/kgs.2017.33.11.5

Water Content and Dry Density Measurement of Soil Using Flat TDR System  

Kim, Wanmin (Dept. of Civil Engrg., Chosun Univ.)
Kim, Daehyeon (Dept. of Civil Engrg., Chosun Univ.)
Seo, Hyeok (Dept. of Civil Engrg., Chosun Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.33, no.11, 2017 , pp. 5-19 More about this Journal
Abstract
This study has been conducted to improve the conventional compaction management method by measuring the water content and dry unit weight of soil using the Time Domain Reflectometry (TDR) method. In order to verify the measured value of the developed flat TDR system, laboratory tests were conducted on six soils. Also, based on laboratory experiments, field tests were conducted to evaluate the applicability of the developed flat TDR system. Also, a comparison experiment was conducted with the Purdue TDR system. In addition, FE analysis was done to confirm the influence range of the Flat probe. As a result, it was confirmed that the influence range was about 10 cm. As a result of laboratory experiment, the water content ratio showed an error of about 0.4% on the average, and in the case of dry unit weight, it showed an error of about 1.6%. For the field test, the water content ratio and unit weight showed an error of 0.8% and 2.5%, respectively. Through the experimental results, it was confirmed that the measured value of the Flat TDR system is more accurate than that of the conventional TDR system.
Keywords
TDR; Flat TDR; Compaction control; Water content; Dry density;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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