ASTM International

30 Articles found

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  • Green Roofs are Growing

    Green Roofs are Growing

    Standards from ASTM International Committee E60 on Sustainability guide work on vegetative green roofs. Walking south along Michigan Ave. from the Chicago River, a first-time visitor might take in the green vistas of Millenium Park sprawling ...

    Cicely Enright

  • Using an Automated Rowe Cell for Constant Rate of Strain Consolidation Testing

    Using an Automated Rowe Cell for Constant Rate of Strain Consolidation Testing

    The paper describes the automation and calibration of a hydraulic Rowe consolidation cell that tests 151-mm-diameter by 60-mm-high specimens. The associated measurement instrumentation for the cell and specimen preparation procedures are also ...

    Sheahan TC; Watters PJ

  • Measurements of Soluble Salt Content of Soils from Arid and Semi-Arid Regions

    Measurements of Soluble Salt Content of Soils from Arid and Semi-Arid Regions

    Soils with soluble salts occur in arid regions worldwide. Depending on the amount of soluble salts present, treatment of these soils may be needed before construction. In engineering, the amount present is usually determined gravimetrically by ...

    Karakouzian M; Pitchford A; Leonard M; Johnson B

  • Consolidation Behavior of Clayey Soils Under Radial Drainage

    Consolidation Behavior of Clayey Soils Under Radial Drainage

    For Barron´s degree of consolidation, Ur, versus the time factor, Tr, relationship for soils undergoing consolidation with radial drainage for the equal vertical strain condition, a simple method has been developed to determine the value of the ...

    Sridharan A; Prakash K; Asha SR

  • The Relationship Between the Soil-Water Characteristic Curve and the Unsaturated Shear Strength of a Compacted Glacial Till

    The Relationship Between the Soil-Water Characteristic Curve and the Unsaturated Shear Strength of a Compacted Glacial Till

    Soils compacted at various “initial” water contents and to various densities should be considered as “different” soils from a soil mechanics behavioral standpoint even though their mineralogy, plasticity, and texture are the same. The engineering ...

    Vanapalli SK; Fredlund DG; Pufahl DE

  • Wave Propagation in Soils: Multi-Mode, Wide-Band Testing in a Waveguide Device

    Wave Propagation in Soils: Multi-Mode, Wide-Band Testing in a Waveguide Device

    This paper presents the development of a waveguide device and the corresponding processing methodology to study wave propagation in particulate materials. Its main advantages are: the cancellation of biasing transfer functions (e.g., transducer, ...

    Fratta D; Santamarina JC

  • Alternative Test Method for Resilient Modulus of Fine-Grained Subgrades

    Alternative Test Method for Resilient Modulus of Fine-Grained Subgrades

    The mechanistic design of flexible pavement systems requires the specification of mechanical properties for asphaltic concrete, base course, and soil subgrade. The stiffness of the soil subgrade is represented by the resilient modulus, Mr, which is ...

    Drumm EC; Li Z; Reeves JS; Madgett MR

  • Advances in Conductometric Phase Transition Porosimetry

    Advances in Conductometric Phase Transition Porosimetry

    The paper describes advances in conductometric phase transition porosimetry (CPTP) test methods and procedures for measuring the pore size distribution of soil. Included are test methods and procedures for (1) measuring the “throat or neck” size ...

    Gunnink BW

  • The Rapid Determination of the Moisture-Retention Characteristics of Soil

    The Rapid Determination of the Moisture-Retention Characteristics of Soil

    A modified technique is described for determining the water-retention curve of a soil. The new technique allows the definition of a moisture-retention curve (typically six to seven data points) much more rapidly than is possible with conventional ...

    Fourie AB; Papageorgiou G; Blight GE

  • Effect of Simulated Roots on the Permeability of Silty Soil

    Effect of Simulated Roots on the Permeability of Silty Soil

    A preliminary laboratory testing program was conducted to investigate the potential effect of vegetation on the hydraulic conductivity of soils used to construct levee structures. The testing program was conducted using a silty sand soil with a ...

    Gabr MA; Akram M; Taylor HM

  • Compressibility Characteristics of Gypseous Sandy Soils

    Compressibility Characteristics of Gypseous Sandy Soils

    Soils containing gypsum as a cementing agent are affected considerably when subjected to changes in water content. Seepage through sandy gypseous soil causes serious damage to foundations built on such soils. A testing program was conducted on ...

    AlNouri I; Saleam S

  • Effect of Short Duration of Load increment on the Compressibility of Soils

    Effect of Short Duration of Load increment on the Compressibility of Soils

    This study concerns the effect of duration of load increment (up to 24 h) on the consolidation properties of expansive black cotton soil (liquid limit = 81%) and nonexpansive kaolinite (liquid limit = 49%). It indicates that the amount and rate of ...

    Sridharan A; Sivapullaiah PV ; Stalin VK

  • Expansion Potential of Compacted Fine-Grained Soils Using Suction Measurements

    Expansion Potential of Compacted Fine-Grained Soils Using Suction Measurements

    Fine-grained soils in arid climates are most often unsaturated. If such soils have a swelling potential, their expansive pressure must be determined for structural design. Hitherto employed swelling test methods are time consuming and not reliable. ...

    Garbulewski K; Zakowicz S; Karim Al-Helo I

  • Moisture Increase in Expansive Soils at Developed Sites

    Moisture Increase in Expansive Soils at Developed Sites

    The purpose of this paper is to provide information pertinent to post-development depth-of-moisture increase in expansive soils underlying developed sites. In southern California, the developments are generally accompanied by irrigation around ...

    Sikh TS

  • A New Combined Servo-Controlled Loading Frame/Direct-Shear Apparatus for the Study of Concrete or Rock Joint Behavior Under Different Boundary and Loading Conditions

    A New Combined Servo-Controlled Loading Frame/Direct-Shear Apparatus for the Study of Concrete or Rock Joint Behavior Under Different Boundary and Loading Conditions

    A new combined servo-controlled loading frame/direct-shear apparatus has recently been developed at the Civil Engineering Department of Université de Sherbrooke. This direct-shear device is capable of shear testing of rock joints under constant ...

    Mouchaorab KS; Benmokrane B

  • Behavior of Fiber-Reinforced Cemented Sand Under Static and Cyclic Loads

    Behavior of Fiber-Reinforced Cemented Sand Under Static and Cyclic Loads

    Triaxial static compression, cyclic compression, and splitting tension tests were performed to evaluate the effect of randomly distributed fiber reinforcement on the response of cemented sand to load. Test results indicated that fiber reinforcement ...

    Maher MH; Ho YC

  • Swelling Pressure Behavior Under Controlled Suction

    Swelling Pressure Behavior Under Controlled Suction

    An experimental study has been conducted to study the swelling pressure behavior of expansive soil in both vertical and lateral directions simultaneously under controlled suction. A series of one-dimensional consolidation tests was carried out on ...

    Habib SA; Karube D

  • A New Traveling Sand Pluviator to Reconstitute Specimens of Well-Graded Silty Sands

    A New Traveling Sand Pluviator to Reconstitute Specimens of Well-Graded Silty Sands

    A new traveling sand pluviator to reconstitute small specimens for laboratory tests was developed in joint research between the Research Center of the Italian National Electricity Board (ENEL CRIS) of Milano and the Department of Structural ...

    Lo Presti DCF; Berardi R; Pedroni S; Crippa V

  • Temperature Dependence of Soil Water Potential

    Temperature Dependence of Soil Water Potential

    To understand the process of coupled heat and water transport, the relationship between temperature and soil water potential must be known. Two clays, Avonlea bentonite and Lake Agassiz clay, are being considered as the clay-based sealing materials ...

    Mohamed A-MO; Yong RN; Cheung SCH

  • An Injection-Correction System to Mitigate Membrane Compliance

    An Injection-Correction System to Mitigate Membrane Compliance

    A computer-controlled injection correction system has been developed to continuously mitigate the adverse effects of membrane compliance for undrained testing of granular soils. The system was developed with the explicit idea that it could be ...

    Nicholson PG; Anwar HA; Seed RB