soil laboratory Articles

  • Infiltration Testing for Hydraulic Conductivity of Soil Liners

    This paper describes the use of single ring infiltrometers for evaluating the hydraulic conductivity of compacted soil liners. Procedures are presented for installation and monitoring of infiltrometers in the field. Results of hydraulic conductivity estimated from infiltrometer tests on six laboratory model liners are presented and compared with the results of conventional laboratory tests. In ...


    By ASTM International

  • Analysis of Hydraulic Gradient Effects for Laboratory Hydraulic Conductivity Testing

    A theoretical model is presented that characterizes the effect of hydraulic gradient on measured hydraulic conductivity in the laboratory. A closed-form equation is derived for the distribution of total head within a hydraulic conductivity test specimen as a function of specimen height, boundary stress conditions, compression index, and change of hydraulic conductivity index. From this ...


    By ASTM International

  • Estimating Water Content of Soils from Electrical Resistivity

    Electrical resistivity has been demonstrated to be an effective predictor of various soil hydraulic properties including water content, degree of saturation, and hydraulic conductivity. Standardized laboratory procedures for measuring soil electrical resistivity are based on the use of the Miller soil box for determining soil corrosive potential from soil resistivity. However, these procedures ...


    By ASTM International

  • Correlation between air permeability and saturated hydraulic conductivity: unburned and burned soils

    Prior research has shown a log–log correlation between ex situ air permeability (ka) measured at a matric potential of –50 and –100 cm H2O and saturated hydraulic conductivity (Ksat) in agricultural soils. We examined the applicability of a previously established log ka vs. log Ksat predictive relation in unburned and burned woodland–chaparral and coniferous soils. Specifically, we measured in ...

  • Sensitivity of unlined canal seepage to hydraulic properties of polyacrylamide-treated soil

    High-molecular-weight, anionic, linear polyacrylamide (PAM) is being evaluated as a means of sealing unlined water delivery canals to reduce seepage losses. In this study, we investigated water seepage loss reduction by using a two-layer one-dimensional steady-state conceptual model. The objectives of this study were twofold: (i) to examine the effectiveness and implications of a PAM-treated thin ...

  • Transition from Maximum Tension Line to Actual Failure Surface in Reinforced Soil Model Walls

    This paper presents the results of laboratory tests conducted on reinforced soil model walls. The effect of model height on distribution of tensile stress in an instrumented reinforcement strip was investigated. It was found that, with increasing height of wall, a continuous redistribution of tensile stress had occurred with the point of maximum tension moving towards the actual failure surface ...


    By ASTM International

  • Compacted lateritic soil treated with blast furnace slag as hydraulic barriers in waste containment systems

    Laboratory testing was conducted to assess the feasibility of using lateritic soil mixed with up to 15% blast furnace slag (BFS) by dry weight of soil as a suitable hydraulic barrier. Tests were carried out on the lateritic soil-slag mixture to ascertain the particle size distribution, index properties and compaction characteristics. The relationship between hydraulic conductivity, unconfined ...


    By Inderscience Publishers

  • Cavity Expansion Tests in a Hollow Cylinder Cell

    This paper presents the use of the hollow cylinder cell in investigating, under laboratory controlled conditions, the response of saturated, consolidated fine grained soils to a cavity expansion. The hollow cylinder cell concept developed originally by Kirkpatrick was adapted to perform cylindrical cavity tests in annular soil specimens with measurement of the excess pore-water pressure generated ...


    By ASTM International

  • Performance of infiltration swales with regard to operation in winter times in an Alpine region

    In cold climate regions winter conditions significantly influence the performance of stormwater infiltration devices. Frozen soil and water storage by snow changes their operation. In this paper winter operation of a grassed infiltration swale was investigated using on-site and laboratory measurements. The field investigation of a grassed swale at a parking place in an Alpine region showed that ...


    By IWA Publishing

  • Assessing Frost Damage in Compacted Clay Liners

    Methods used to assess frost damage (here defined as a large increase in hydraulic conductivity) in compacted clay liners are reviewed and evaluated using data collected from two test pads that were instrumented and then exposed to winter weather. The methods include comparisons of measurements of either water content and dry unit weight or hydraulic conductivity made before and after winter ...


    By ASTM International

  • Detailed hydraulic assessment using a high-resolution piezocone coupled to the GeoVIS

    Department of Defense (DoD) ground water assessment and remediation projects require cost effective methods for determining the direction and rate of ground water and contaminant flow. Monitoring wells have typically been used to estimate these parameters. However, detailed three-dimensional ground water and contaminant flow pathways cannot typically be delineated using monitoring well data. ...

  • Detailed hydraulic assessment using a high-resolution piezocone

    Department of Defense (DoD) ground water assessment and remediation projects require cost effective methods for determination of the direction and rate of ground water and contaminant flow. Monitoring wells have typically been used to estimate these parameters. However, detailed three-dimensional ground water and contaminant flow pathways cannot typically be delineated using monitoring well data. ...

  • Comparison of in-situ measured ground heat fluxes within a heteorogeneous urban ballast layer

    This study concentrates on measurements of ground heat fluxes within a porous urban ballast layer that were conducted from June to September 2002 at the goods station in Osnabr€uck, Germany. To account for the limitation of accurately installing sensors within the heterogeneous and porous ballast bulk, the heat fluxes were calculated from four different methods to compare their variability, ...


    By Springer

  • Conducting The Phase I Assessment - Records Review

     This is the second in a series of five articles relating to conducting Phase I Environmental Site assessments. Each article attempts to give the reader a thorough understanding of a specific aspect of the Phase I process and Clayton’s commitment to meeting or exceeding the requirements of ASTM Standard E 1527 Standard Practice for Environmental Site Assessments: Phase I Environmental Site ...


  • Buy Smarter – what questions should you ask when buying a pH meter?

    When you’re looking to buy a pH meter, whether it’s to start measuring or to replace an existing meter, the range of brands and specifications available is huge. With so many options it can be difficult to know where to start, but taking a little time to choose carefully could save you a lot of time and money overall by making sure the meter you choose is right for ...


    By Camlab Limited

Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you