laboratory testing Articles

  • Assembly Line Automation Equipment for Different Industries

    Assembly Line Automation Equipment for Low Voltage Electrical Industry YiHeDa has a wealth of experience in providing handling and automation solutions to the low voltage electrical industry to complete the automatic assembly and testing of electrical welding, low-voltage switches, cam ...

  • Mining Emissions Effectively Monitored with Micro Pulse LiDAR Technology

    Mining operations include blasting, excavating, scraping, and sifting large amounts of dirt. These activities create dust and other emissions that are transported by air currents to surrounding areas. It is easy to say that dangerous particulate matter (PM) generated by mining should be monitored and kept to a minimum; however, it is very challenging to measure the levels of contaminants in the ...

  • Micro Pulse LiDAR: A Critical Tool for Emissions Source Detection

    Micro Pulse LiDAR remote sensing data are used to calculate a highly accurate Planetary Boundary Layer (PBL) height to improve plume models that help assess emissions sources. ...

  • Alternative Fuels - A Look At the Current Environment

    Overview Vehicles powered by gasoline and diesel account for emissions of dangerous air pollutants and contribute to the presence of greenhouse gases. Consumers, businesses, and public entities looking for environmentally friendly alternatives to gasoline and diesel-powered cars and trucks have viable choices beyond the well-known battery electric and plug-in hybrid electric ...

  • Base Tests Common Cleanup Solution at Uncommon Site

    The Air Force has installed a granular activated carbon (GAC) adsorption system to remove contamination from groundwater at a remote Air Force Research Laboratory (AFRL) Propulsion Directorate ...


    By J.C. Palomar, Inc.

  • Abandon Well Contaminate Aquifer

    This article points out the magnitude of this urgent issue.  An abandoned well becomes an opening into an aquifer which is likely to introduce contamination.  Filling it in is a critical component of protecting the well water supply.  Click here to read the ...

  • Hydrodynamic Aspects in the Rotating Clyinder Erosivity Test

    A comparison of different experimental installations used to study clay erosivity is presented. Flow in a rotating cylinder used in geotechnical laboratories is studied in detail. Analysis of the shear stress is presented, and conclusions are drawn as to the limitations of the quantitative evaluations of the critical shear stress in the rotating cylinder ...


    By ASTM International

  • Developing a Culture of Quality Through EQA

    From specimen collection to delivery of test results, laboratory testing must conform to the highest standards of quality: lives depend on it. Click the image below to read more from APHL. ...


    By Qualtrax Inc

  • Determination of Design Parameters of a Mesh-Type Soil Reinforcement

    Problems in determining design parameters of a new mesh-type soil reinforcement are investigated. A special apparatus referred to as the split-box was developed to enable measurement of design parameters with large-scale laboratory tests. In addition to the scale of the tests, the design innovations of the split-box ensure reliability of test results, as verified by a number of calibration tests. ...


    By ASTM International

  • Apparatus and Procedures for a Railroad Ballast Plate Index Test

    A small field plate bearing test was developed in response to a need for a method for measuring the physical state of railroad ballast. The recommended apparatus and procedures for this test are described in this paper. They evolved from a laboratory investigation of the variables influencing the test and field experience at a variety of track ...


    By ASTM International

  • Determination of Collapse Potential of Soils

    A review of various criteria that have been proposed to identify collapsible soils and test techniques, which are used to quantify the amount of collapse, is presented. The results of a series of laboratory single and double oedometer collapse tests conducted on three metastable loess soils are presented to illustrate problems associated with investigating collapse behavior of soils. Guidelines ...


    By ASTM International

  • Measurement of In Situ Density of Sand in a Chamber by Using a Thermal Conductivity Penetrometer

    Reliable in situ testing during soil exploration is of great help to geotechnical engineers in design considerations. This paper describes the theory and the laboratory test results for determination of the density of a sand with a quasi-static penetrometer by measuring its thermal conductivity. Effects of disturbance caused by the penetrometer have been studied. It is shown that it is possible ...


    By ASTM International

  • Summary of Lab Test Results on Gravelpave2

    The attached summary of laboratory tests on bare and sand filled rings presents compression resistance data relate to the load bearing capacity of our rings for various applications. Test Data from A.G.Wassenaar, Inc., Geotechnical Consultants, Denver, Colorado, 30 April 1991. This test used Forney Compression Testing Machine, 400,000 lb capacity, at rates of 200 lb/sec (unfilled rings) and 2000 ...


    By Invisible Structures, Inc.

  • Summary of Lab Test Results on Grasspave2

    The attached summary of laboratory tests on bare and sand filled rings presents compression resistance data relate to the load bearing capacity of our rings for various applications. Test Data from A.G.Wassenaar, Inc., Geotechnical Consultants, Denver, Colorado, 30 April 1991. This test used Forney Compression Testing Machine, 400,000 lb capacity, at rates of 200 lb/sec (unfilled rings) and 2000 ...


    By Invisible Structures, Inc.

  • Laboratory Measurement of Small Strain Shear Modulus Under K0 Conditions

    A new device to measure the small strain shear modulus (Gmax) under a no lateral strain condition has been developed. The techniques for measuring Gmax are discussed, with emphasis on bender element techniques. The performance of the bender elements are compared with results from simultaneous resonant column tests. An in-depth description of the lateral stress measurement system, the Gmax ...


    By ASTM International

  • On Large-Scale Model Testing of Laterally Loaded Drilled Shafts in Sand

    An extensive large-scale laboratory model testing program was developed to assess the behavior of drilled shafts under lateral and moment loading. Because of the large scale of the testing, little information was available in the literature on sand deposit and test preparation or on test conduct and monitoring. In this paper, guidance is presented on these preparation and testing issues, and ...


    By ASTM International

  • A Thermally Controlled Test Chamber for Centrifuge and Laboratory Experiments

    This note describes a novel approach for the provision of a thermally controlled testing chamber. The main principal of the system is to use a layer of cooled air as an active insulation medium to convect away heat transferred through conventional passive insulation. Results from laboratory floor and centrifuge tests are reported. Observed and predicted performance capabilities of the chamber are ...


    By ASTM International

  • Summary of Lab Test Results on Slopetame2

    The attached summary of laboratory tests on bare and sand filled rings presents compression resistance data relate to the load bearing capacity of our rings for various applications. Test Data from A.G.Wassenaar, Inc., Geotechnical Consultants, Denver, Colorado, 30 April 1991. This test used Forney Compression Testing Machine, 400,000 lb capacity, at rates of 200 lb/sec (unfilled rings) and 2000 ...


    By Invisible Structures, Inc.

  • Expansive Soils under Cyclic Drying and Wetting

    An approach was developed to study the swell-shrinkage behavior of expansive soil samples in the laboratory under the action of the actual load to which the soil will be subjected in the field. The fatigue phenomenon due to cyclic drying and wetting has been under investigation, and this paper describes in detail the modified oedometer used in this investigation and the testing procedure adopted. ...


    By ASTM International

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