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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ASTM D, Test equipment Controls

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 elastic constants Methods B and D are used to calculate the stress and deformation in rock structures. In addition, they are representative of the significant digits that generally should be retained.

Strain is not typically measured; therefore a stress-strain curve is not produced. 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. Methods A and B determine the triaxial compressive strength at different pressures and Methods C and D determine the unconfined, uniaxial strength. Home Products Search results Results for: Note 1 Elastic moduli measured by sonic methods Test Method D may often be employed as preliminary measures of anisotropy.

Deformation and strength of rock are known to be functions of confining pressure.

This standard does not purport to address all of the awtm concerns, if any, associated with its use. Temperature Variation— Applies to any of the methods and allows for testing at temperatures above or below room temperature.

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This option is identified by the Certificate code shown on the following table. 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.

Link to Active This link will always route to the current Active version of the standard. Method A, triaxial compression test, is commonly used to simulate the stress conditions under which most underground rock masses exist. Historical Version s – view previous versions of standard. The elastic moduli for such rocks should be determined from unload-reload cycles that are not covered by these test methods.

Agencies that meet the criteria of Practice D are generally considered capable of competent and objective testing. 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. It performs either uniaxial or triaxial tests under Platens surface hardness certificate The standards prescribe a minimum surface hardness depending on the type of test to be performed. Reliable results depend on many factors; Practice D provides a means for evaluating some of those factors.

Follow us YouTube LinkedIn. Concrete – Upgradings for Compression Testers: The test system comprehends: No other units of measurement are included in this standard. 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.

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Thus the strength values determined are in terms of total stress, that is, are not corrected for pore pressures. Therefore, laboratory values for intact specimens must be employed with proper judgment in engineering applications.

ASTM D7012 – 14e1

Rock mechanics – Accessories for uniaxial and triaxial tests: These methods make no provision for pore pressure measurements and specimens are undrained platens are not vented.

The Rock core should have a diameter from Iva Company info Privacy ast Elastic moduli measured by sonic methods Test Method D may often be employed as a preliminary measure of anisotropy.

The 2 consoles are operated independently and the When required, the hardness verification is performed with certified instruments. Rock mechanics – Uniaxial and triaxial test systems: Rock mechanics – Highly advanced rock testing systems: Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not asfm as part of the standard.

However, there are some cases where either d70012 rock type or the loading condition of the problem under consideration will require the effective stress or drained parameters be determined. This test method does not include the procedures necessary to obtain a stress-strain curve beyond the ultimate strength.

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.