... The hydraulic conductivity of silty till increases when the till is subjected to freeze–thaw cycles. A dramatic increase normally occurs after the first freeze–thaw cycle, and the magnitude generally depends on the initial or molding water content. Freezing of silty till causes aggregations...

... hydraulic conductivity miscible displacement psychrometer tensiometer TDR neutron attenuation surface seal ASTM Special Technical Publication, Vol. 6, No. 1 Paper ID JAI101497 Available online at www.astm.org R. E. Sojka,1 G. A. Lehrsch,1 S. J. Kostka,2 J. L. Reed,1 A. C. Koehn,1 and J...

... Sodium bentonite samples were obtained from seven bentonite mining pit stockpiles. Swell index, fluid loss and hydraulic conductivity testing of the sodium bentonite was performed at two different laboratories. The major objectives of the study were: • To determine the correlation, if any...

... conductivity of the GCL over time. This paper will detail an investigation of a 5 year old plus GCL barrier layer within two landfill closures for a coastal Florida county and determine if any changes in properties of the bentonite/GCLs have occurred. The samples were tested for hydraulic conductivity, fluid...

... The hydraulic conductivity of a scrim reinforced nonwoven thermal locked geosynthetic clay liner (GCL) with respect to both de-aired distilled water and arctic diesel (jet fuel) are examined for different numbers of freeze and thaw cycles. The hydraulic conductivity of jet fuel is found...

... For waste facilities, field assessment of the hydraulic conductivity of fine- grained soils has been a real challenge for the past decades that has led to several types of test methods. Although standards (ASTM, NF, etc.) have been adopted in many countries, any test method needs careful...

... Contaminates behave differently in the vadose zone than they do in the saturated zone and the governing equations for them are more involved. The hydraulic conductivity and porosity are the most important parameters affecting water and contaminates movements in the vadose and the saturated zones...

... Field infiltration tests are commonly used to assess the hydraulic conductivity of low permeability materials such as natural clay barriers and compacted clay liners. The soils used for compacted clay liners are always partially saturated and require very long testing times to reach steady-state...

... Paper sludges are being used with increasing frequency for construction of hydraulic barrier layers in landfill final covers because they often have substantial clay content and relatively low hydraulic conductivity. This paper addresses the assessment of the hydraulic conductivity of paper...

.... Column and batch leaching tests are conducted on the cement stabilized sludge containing heavy metals (lead and chromium). The batch test is in accordance with the Japanese regulatory requirement. The column leaching test is performed to account for hydraulic conductivity. The accumulated mass of heavy...

... water contents. The hydraulic conductivity was also measured. To estimate the exuding potential of a given waste, a method to determine the amount of extractable liquid ( q f ) for an infinite time is proposed. This method presents the advantage of considerably reducing the required time...

... more accurately predicted the behavior observed in both the laboratory and the field. sludge consolidation hydraulic conductivity compressibility large strain capping covers Ahmet H. Aydilek, 1Tuncer B. Edil, ~and Patrick J. Fox2 Consolidation Characteristics of Wastewater Sludge...

... of hydraulic conductivity are significantly influenced by the soil constituents. Specifically, kaolinite exhibits a low dry density and a high coefficient of permeability when compared to the other soils (KS, KC and KSC). As permeant flow approaches a stationary regime, greater pore volumes of effluents result...

... A database was compiled containing index properties, compaction data, and hydraulic conductivity data from 51 clay liners. The hydraulic conductivity data included large-scale field measurements (K F ) and small-scale laboratory measurements (K L ) on specimens collected from the field in 74-mm...

... structure. X-ray radiography was utilized to study the changes in the macrostructure of fine-grained soils that resulted from freeze and thaw cycling. Freeze-and-thaw cycling changes the engineering properties of fine-grained soils (e.g., the hydraulic conductivity increases by one to three orders...

... content, the paper sludges from the Hudson River Mill were compacted to a low hydraulic conductivity. The permeability and compressibility of the paper sludges are influenced by the water content and organic content. Although a paper sludge cover system may not initially meet the regulatory requirement...

... The method of preparing a single needle-punched GCL product for evaluation of hydraulic conductivity in a flexible wall permeameter was examined. The test protocol utilized for this evaluation was GRI Test Method GCL-2 Permeability of GCLs. The GCL product consisted of bentonite clay material...

..., potassium, magnesium and calcium species in the bentonite, and changes in hydraulic conductivity and electrical conductance are reported and discussed. geosynthetic clay liner hydraulic conductivity ion exchange bentonite cation exchange capacity John D. Quaranta,* M o h a m m e d A. Gabr, 2...

... An important property of geosynthetic clay liners (GCLs) is hydraulic conductivity. The authors describe and evaluate a new device, a GCL flowbox, that offers several advantages over large tanks or flexible-wall permeameters. The GCL flowbox can be used to test large-scale intact specimens...

... One of the important properties of geosynthetic clay liners (GCLs) is hydraulic conductivity. In the laboratory, hydraulic conductivity of GCLs is typically measured in flexible-wall permeameters. The most important variables in hydraulic conductivity testing of GCLs are addressed, including (i...