Estimation of soil-water characteristic curves in multiple-cycles using membrane and TDR system

Won Taek Hong, Young Seok Jung, Seonghun Kang, Jong Sub Lee

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

The objective of this study is to estimate multiple-cycles of the soil-water characteristic curve (SWCC) using an innovative volumetric pressure plate extractor (VPPE), which is incorporated with a membrane and time domain reflectometry (TDR). The pressure cell includes the membrane to reduce the experimental time and the TDR probe to automatically estimate the volumetric water content. For the estimation of SWCC using the VPPE system, four specimens with different grain size and void ratio are prepared. The volumetric water contents of the specimens according to the matric suction are measured by the burette system and are estimated in the TDR system during five cycles of SWCC tests. The volumetric water contents estimated by the TDR system are almost identical to those determined by the burette system. The experimental time significantly decreases with the new VPPE. The hysteresis in the SWCC is largest in the first cycle and is nearly identical after 1.5 cycles. As the initial void ratio decreases, the air entry value increases. This study suggests that the new VPPE may effectively estimate multiple-cycles of the SWCC of unsaturated soils.

Original languageEnglish
Article number1019
JournalMaterials
Volume9
Issue number12
DOIs
Publication statusPublished - 2016

Keywords

  • Membrane
  • Soil-water characteristic curve
  • Time domain reflectometry
  • Unsaturated soils
  • Volumetric pressure plate extractor

ASJC Scopus subject areas

  • Materials Science(all)

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