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ASTM D3148-02

Заменен
Standard Test Method for Elastic Moduli of Intact Rock Core Specimens in Uniaxial Compression (Withdrawn 2005) — 6 стр.
Причина отмены

This test method covers the determination of elastic moduli of intact rock core specimens in uniaxial compression. It specifies the apparatus, instrumentation, and procedures for determining the stress-axial strain and the stress-lateral strain curves, as well as Young's modulus, E, and Poisson's ratio, .

Formerly under the jurisdiction of Committee D18 on Soil and Rock, this test method was discontinued in May 2005 and replaced by D 7102, Test Method for Compressive Strength and Elastic Moduli of Intact Rock Core Specimens Under Varying States of Stress and Temperature.

For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards volume information, refer to the standard's Document Summary page on the ASTM website.

Область применения

1.1 This test method covers the determination of elastic moduli of intact rock core specimens in uniaxial compression. It specifies the apparatus, instrumentation, and procedures for determining the stress-axial strain and the stress-lateral strain curves, as well as Young's modulus, E, and Poisson's ratio, v

Note 1—This test method does not include the procedures necessary to obtain a stress-strain curve beyond the ultimate strength.

1.2 For an isotropic material, the relation between the shear and bulk moduli and Young's modulus and Poisson's ratio are:

Equation 1

G =

E

2(1 + v)

Equation 2

K =

E

3(1 - 2v)

where:
G = shear modulus,
K = bulk modulus,
E = Young's modulus, and
v = Poisson's ratio.

The engineering applicability of these equations is decreased if the rock is anisotropic. When possible, it is desirable to conduct tests in the plane of foliation, bedding, etc., and at right angles to it to determine the degree of anisotropy. It is noted that equations developed for isotropic materials may give only approximate calculated results if the difference in elastic moduli in any two directions is greater than 10 % for a given stress level.

Note 2—Elastic moduli measured by sonic methods may often be employed as preliminary measures of anisotropy.

1.3 The test method given for determining the elastic constants does not apply to rocks that undergo significant inelastic strains during the test, such as potash and salt. The elastic moduli for such rocks should be determined from unload-reload cycles, which is not covered by this test method.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

ICS
93.020 Earthworks. Including geotechnics / Земляные работы. Выемка грунта. Сооружение фундаментов. Подземные работы. Включая геотехнику
Сборник ASTM
04.08 Soil and Rock (I): D420 – D5876 / Грунт и Горные породы (I): D420 – D5876
Тематика
Geotechnical Engineering