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Showing 1 to 7 of 7 for “"air entry value"”.
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An Experimental Study on Soil Water Characteristics and Hydraulic Conductivity of Compacted Soils
… soil-water characteristic in terms of its air-entry value (AEV), rate of drying, and size of the hysteresis loop. The test results indicate that the SWCC and HCF obtained in terms of volumetric water content is more sensitive to the changes in dry density than molding water content. Based …
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Suction Cup Lysimeter Method for Extracting Pine Bark Substrate Solution
… tested were 4.8-cm diameter with a ½ or 1-bar air-entry value (AEV) and 2.2-cm diameter also with a ½ or 1-bar AEV. Sufficient volume could be obtained when a vacuum pressure of 30, 40 or 50 cb was applied to lysimeters with a minimum extraction time of five minutes. The 2.2-cm lysimeters were …
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Saturated–Unsaturated behaviour of compacted clays
… results. The compacted clay was found to have an air entry value of 700 kPa and a residual suction value of 5 × 104 kPa along with s-shaped swell-shrink curve for dry of optimum and j-shaped for wet of optimum. At optimum, osmotic suction was operative within the 70-100% saturation range and …
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Preferential flow in vertically oriented, unsaturated soil layers
… material. Once suctions exceed the air entry value of the material the largest voids begin to drain, air enters the system and the hydraulic conductivity decreases. The decrease in hydraulic conductivity with increased suctions for each material is dependent on the distribution of …
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Influence of soil bulk density and matric potential on relative gas diffusivity and urea/nitrate-derived N₂O and N₂ losses
… 4.97%, respectively. There was a threshold Dp/Do value of 0.038 below which cumulative N₂‐N fluxes increased significantly. Cumulative N₂‐N: N₂O‐N ratios were higher at soil ρb values of 1.3 and 1.4 Mg m⁻³. Both Dp/Do and WFPS explained urea‐derived cumulative N₂O‐N and N₂‐N fluxes equally well. …
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The Impact of a Planar Drainage Geocomposite in Unsaturated Soil
… Tempe pressure plate cell with a high-flow, low Air-Entry Value (AEV) porous ceramic was used to obtain GWCCs for several variations of geotextiles used in the DrainTube® product line under a variety of vertical loads by use of hanging column and axis translation principles. A custom permeameter …
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Use of thermo-active piling for slope stabilisation
… suction increases with the increase of the soil air entry value (AEV). The analysis further showed how temperature changes predominantly affect the load transferred to stabilising piles due to the change in soil-pile contact pressure resulting from the thermal expansion of the soil-pile system. …