Lab Services: Soil testing

Lab Services: Soil testing

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Test Method Title

Standard Test Methods for Modulus and Damping of soils by the Resonant-Column Method

Reference Number

ASTM D4015

Material

Soil

Test Property

Young's Modulus and damping ratio, axial strain

Description of Test

The modulus and damping of a given soil, as measured by the resonant-column technique herein described, depend upon the strain amplitude of vibration, the ambient state of effective stress, and the void ratio of the soil, temperature, time, etc. Since the application and control of the ambient stresses and the void ratio are not prescribed in these methods, the applicability of the results to field conditions will depend on the degree to which the application and control of the ambient stresses and the void ratio, as well as other parameters such as soil structure, duplicate field conditions. The techniques used to simulate field conditions depend on many factors and it is up to the engineer to decide on which techniques apply to a given situation and soil type.

Preferred Test Sample Size

2.87 in diameter x 3 ft Shelby tube or equivalent

Number of Test Specimens

1

Test Specimen Size

1.3 in diameter minimum with a height-to-diameter ratio of between 2 and 7. The largest particle shall be smaller than 1/10 the specimen diameter, with some exceptions (refer to specification).

Keywords

amplitude, confining pressure, damping. dynamic loading, elastic waves, elasticity modulus, frequency, resonance, shear tests, torsional oscillations, triaxial stress, vertical oscillations, vibrations, Young's modulus, dynamic, torsional shear

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