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Calibration of thermal conductivity sensors for measuring soil suction

, : Calibration of thermal conductivity sensors for measuring soil suction. ASTM Geotechnical Testing Journal 12(3): 188-194

The accuracy of suction measurements using thermal conductivity sensors is dependent upon their calibration. The experimental setup along with the calibration procedure are described. In general, results showed reasonable agreement between the calibration curve determined in this study compared to those provided by the manufacturer for matric suction ranging from 0 to 175 kPa.--modified journal abstract.

Accession: 002042094

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Related references

Tan Elsa; Fredlund D.G.; Marjerison Brent, 2004: Long term measurements of matric suction and soil temperature using thermal conductivity sensors. Annual Meeting - Transportation Research Board 83(2004

Sattler Pamela; Fredlund D.G., 1989: Use of thermal conductivity sensors to measure matric suction in the laboratory. The measurement of soil suction is pivotal to the application of soil mechanics principles in geotechnical engineering practice related to unsaturated soils. Volume change, shear strength, and seepage analyses all require an understanding of the m...

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Feng Man; Fredlund Delwyn G., 2003: Calibration of thermal conductivity sensors with consideration of hysteresis. A thermal conductivity sensor monitors soil suction by measuring the changes in thermal conductivity of the porous tip. The thermal conductivity of the porous tip is a direct function of its water content. It has long been recognized that the suct...

Rahardjo H.; Loi J.; Fredlund D.G., 1989: Typical matric suction measurements in the laboratory and in the field using thermal conductivity sensors. Pages 127-131 1989

Fredlund, D.G., 1992: Background, theory, and research related to the use of thermal conductivity sensors for matric suction measurement. This paper describes the history and use of thermal conductivity sensors to measure matric suction. The sensors were initially developed and used primarily with irrigation control systems. More recently, attempts to apply the sensors to geotechnic...

Tan Elsa; Fredlund Delwyn G.; Marjerison Brent, 2007: Installation procedure for thermal conductivity matric suction sensors and analysis of their long-term readings. Thermal conductivity matric suction sensors have enabled continuous and long-term measurement of matric suction and temperature, even in remote locations. Long-term temperature and matric suction readings were obtained from below two thin-membrane...

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Booltink H.W.G.; Bouma J.; Gimenez D., 1991: Suction crust infiltrometer for measuring hydraulic conductivity of unsaturated soil near saturation. The laborious crust test, used to measure unsaturated hydraulic conductivity, was modified into a more operational suction crust infiltrometer. By varying the level of the mariotte tube inside the feeder burette, different negative pressure heads...

Wong, D., K.H.H., A., 1987: An evaluation of a thermal conductivity sensor for the measurement of soil matric suction