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  2. Four-point flexural test - Wikipedia

    en.wikipedia.org/wiki/Four-point_flexural_test

    The test method for conducting the test usually involves a specified test fixture on a universal testing machine. Details of the test preparation, conditioning, and conduct affect the test results. The sample is placed on two supporting pins a set distance apart and two loading pins placed at an equal distance around the center.

  3. Three-point flexural test - Wikipedia

    en.wikipedia.org/wiki/Three-point_flexural_test

    The test method for conducting the test usually involves a specified test fixture on a universal testing machine. Details of the test preparation, conditioning, and conduct affect the test results. The sample is placed on two supporting pins a set distance apart. Calculation of the flexural stress

  4. Static load testing - Wikipedia

    en.wikipedia.org/wiki/Static_load_testing

    Static load testing is an in situ type of load testing used in geotechnical investigation to determine the bearing capacity of deep foundations prior to the construction of a building. It differs from the statnamic load test and dynamic load testing in that the pressure applied to the pile is slower.

  5. Compressive strength - Wikipedia

    en.wikipedia.org/wiki/Compressive_strength

    The parameters (,,,) obtained from a test result can be used with these formulas to calculate the equivalent true stress ´ at failure. Specimen shape effect The graph of specimen shape effect shows how the ratio of true stress to engineering stress (σ´/σ e ) varies with the aspect ratio of the test specimen ( d o / l o {\textstyle d_{o}/l ...

  6. Rockwell scale - Wikipedia

    en.wikipedia.org/wiki/Rockwell_scale

    Load main load: reference below form / table 'Scales and values'. Leave the main load for a "dwell time" sufficient for indentation to come to a halt. Release load; the Rockwell value will typically display on a dial or screen automatically. [15] In order to get a reliable reading the thickness of the test-piece should be at least 10 times the ...

  7. California bearing ratio - Wikipedia

    en.wikipedia.org/wiki/California_bearing_ratio

    Penetration is measured by applying the bearing load on the sample using a standard plunger of diameter 50 mm at the rate of 1.25 mm/min. The CBR is expressed as a percentage of the actual load causing the penetrations of 2.5 mm or 5.0 mm to the standard loads on crushed stone. A load penetration curve is drawn.

  8. Factor of safety - Wikipedia

    en.wikipedia.org/wiki/Factor_of_safety

    In engineering, a factor of safety (FoS) or safety factor (SF) expresses how much stronger a system is than it needs to be for an intended load.Safety factors are often calculated using detailed analysis because comprehensive testing is impractical on many projects, such as bridges and buildings, but the structure's ability to carry a load must be determined to a reasonable accuracy.

  9. R-value (soils) - Wikipedia

    en.wikipedia.org/wiki/R-value_(soils)

    The R-Value test [1] measures the response of a compacted sample of soil or aggregate to a vertically applied pressure under specific conditions. This test is used by Caltrans for pavement design, replacing the California bearing ratio test. Many other agencies have adopted the California pavement design method, and specify R-Value testing for ...

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