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|Title:||Factors affecting drying and wetting soil-water characteristic curves of sandy soils||Authors:||Yang, Hong
Leong, Eng Choon
Fredlund, Delwyn G.
|Keywords:||DRNTU::Engineering::Civil engineering::Geotechnical||Issue Date:||2004||Source:||Yang, H., Rahardjo, H., Leong, E. C., & Fredlund, D. G. (2004). Factors Affecting Drying and Wetting Soil-Water Characteristic Curves of Sandy Soils. Canadian Geotechnical Journal, 41(5), 908–920.||Series/Report no.:||Canadian geotechnical journal||Abstract:||Drying and wetting soil-water characteristic curves (SWCCs) for five sandy soils are investigated using a Tempe pressure cell and capillary rise open tube. The test data are fitted to two SWCC equations using a least-squares algorithm. The obtained fitting parameters and some hysteretic behaviour are discussed and correlated with grain-size distribution parameters. A concept of total hysteresis is proposed to quantify the hysteresis of SWCC. The measured SWCC for one soil is also compared with the SWCC estimated from its grain-size distribution. The SWCC was also obtained at a high dry density for one of the soils. The results show that the shapes of the SWCCs are similar to the grain-size distributions of the soils and are affected by the dry density of the soil. A coarse-grained soil has a lower air-entry value, residual matric suction, and water-entry value and less total hysteresis than a fine-grained soil. The residual matric suction and water-entry value tend to approach the same value when the effective grain size D10 of the soil is small, in the range of 3-6 mm. SWCCs of uniform soils have steeper slopes and less total hysteresis than those of less uniform soils. Soils with a low dry density have a lower air-entry value and residual matric suction than soils with a high dry density. The SWCC predicted from grain-size distribution is found to be sufficiently accurate.||URI:||https://hdl.handle.net/10356/104306
|DOI:||10.1139/t04-042||Rights:||© 2004 Canadian Science Publishing||Fulltext Permission:||none||Fulltext Availability:||No Fulltext|
|Appears in Collections:||CEE Journal Articles|
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