ASTM D7012 PDF

ASTM D Standard Test Methods for Compressive Strength and Elastic Moduli of Intact Rock Core Specimens under Varying States of Stress and. ASTM D Method C. Reference. Uniaxial Compressive Strength of Intact Rock Core Specimens. (deg). Type. Failure Mode. Rock Type. Buy ASTM D TEST METHOD FOR COMPRESSIVE STRENGTH AND ELASTIC MODULI OF INTACT ROCK CORE SPECIMENS UNDER VARYING.

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It is beyond the scope of this standard to consider significant digits used in analytical methods for engineering design. Active view current version of standard.

Thus, the strength 7d012 determined are in terms of total stress and are not corrected for pore pressures.

ASTM D, Test equipment Controls

Rock mechanics – Accessories for uniaxial and triaxial tests: In addition, they are representative of the significant digits that generally should be retained. Iva Company info Privacy policy It should be observed that this method makes aatm provision for pore pressure measurements and specimens are undrained platens are not vented.

No other units of measurement are included in this standard.

It performs either uniaxial or triaxial tests under However, there are some cases where either the rock type or the loading condition of the problem under consideration will require the effective stress or drained parameters be determined. The elastic constants Methods B and D are used to calculate the stress and deformation in rock structures.

Agencies that meet the criteria of Practice D are generally considered capable of competent and objective testing. Link to Active This link will always route to the current Active version of the standard.

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ASTM D7012 – 14e1

The tests provide data in determining the strength of rock, namely: Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Thus the strength values determined are in terms of total stress, that is, are not corrected for pore pressures.

The test system comprehends: It is desirable to conduct tests in the plane of foliation, cleavage or bedding and at right angles to it to determine the degree of anisotropy. Link to Active This link will always route to the current Active version of the standard.

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. The Rock core should have a diameter from Historical Version s – view previous versions of standard. Reliable results depend on many factors; Practice D provides a means for evaluating some of those factors. The quality of the result produced by this standard is dependent on the competence of the personnel performing it, and the suitability of the equipment and facilities used.

The elastic moduli for such rocks should be determined from unload-reload cycles, that are not covered by this test method. Gshear modulus,Kbulk modulus, EYoung’s modulus, and Poisson’s ratio.

The test method specifies the apparatus, instrumentation, and procedures for determining the stress-axial strain and the stress-lateral strain curves, as well as Young’s modulus, Eand Poisson’s ratio. Elastic moduli measured by sonic methods Axtm Method D may often be employed as a preliminary measure of anisotropy. Strain is not typically measured; therefore a stress-strain curve d712 not produced. Platens surface hardness certificate The standards prescribe a minimum surface hardness depending on the type of test to be performed.

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Rock mechanics – Uniaxial and triaxial test systems: Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. The 2 xstm are operated independently and the Deformation and strength of rock are known to be functions of confining pressure. Method A, triaxial compression test, is commonly used to simulate the stress conditions under which most underground rock masses exist.

Rock mechanics – Highly advanced rock testing systems: These methods make no provision for pore pressure measurements and specimens are undrained platens are qstm vented.

Therefore, laboratory values for intact specimens must be employed with proper judgment in engineering applications. This option is identified by the Certificate code shown on the following table. Home Products Search results Results for: Users of this standard are cautioned that compliance adtm Practice D does not in itself ensure reliable results. It is desirable to conduct tests aetm the plane of foliation, cleavage or bedding and at right angles to it to determine the degree of anisotropy.

Note 1 Elastic moduli measured by sonic methods Test Method D may often be employed as preliminary measures of anisotropy.