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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Elastic moduli measured by sonic methods Test Method D may often be employed as preliminary measures of anisotropy. Hoek cells and sample extruder The Hoek triaxial cells are offered in five models of different size; each one consists of the following: Method A, triaxial compression test, is commonly used to simulate the stress conditions under which most underground rock masses s7012. 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. Link to Active This link will always route to the current Active version of the standard.

Active view current version of standard. The test system comprehends: The original four standards are now referred to as Methods in this standard. The elastic moduli for such rocks should be determined from unload-reload cycles that are not covered by these test methods.

Platens surface hardness certificate The standards prescribe a minimum surface hardness depending on the type of test to be performed. Temperature Variation— Applies to any of the methods and allows for testing at temperatures above or below room temperature. Rock mechanics – Uniaxial and triaxial test systems: Home Products Search results Results for: These methods make no provision for pore pressure adtm and specimens are undrained platens are not vented.

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ASTM D7012 – 14e1

Link to Active This link will always route to the current Active version of the standard. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. This standard does not purport to address all of the safety concerns, if any, associated with its use. Methods A and B determine the triaxial compressive strength at different pressures and Methods C and D determine the unconfined, uniaxial strength.

Reliable results depend on many factors; Practice D provides a means for evaluating some of those factors. In the triaxial mode, a water pressure gradient may be applied to the specimen 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 is beyond the scope of this standard to consider significant digits used in analytical methods for engineering design.

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 v7012 regulatory limitations prior to use. Thus the strength values determined are in terms of total stress, that is, are not corrected for pore pressures. Strain is not typically measured; therefore a stress-strain curve is not produced.

Historical Version s – view previous versions of standard. In addition, they are representative of the significant digits that generally should be retained.

The Rock core should have a diameter from The elastic moduli for such rocks should be determined from unload-reload cycles, that are not covered by this test method. This test method does not include the procedures necessary to obtain a stress-strain curve beyond the ultimate strength.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

Users of this standard are cautioned that compliance with Practice D does not in itself ensure reliable results. These test methods do not include the procedures necessary to obtain a stress-strain curve beyond the ultimate strength.

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No other units of measurement are included in this standard. 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. Iva Company info Privacy policy Follow us YouTube LinkedIn. The 2 consoles are operated independently and the It should be observed that this method makes no provision for pore pressure measurements and specimens are undrained platens are not vented.

Thus, the strength values determined are in terms of total stress and are not corrected for pore pressures. Agencies that meet the criteria of Practice D are generally considered capable of competent and objective testing. Gshear modulus,Kbulk modulus, EYoung’s modulus, and Poisson’s ratio.

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. When required, the hardness verification is performed with certified instruments. It performs either uniaxial or triaxial tests under Rock mechanics – Accessories for uniaxial and triaxial tests: Rock mechanics – Highly advanced rock testing systems: Therefore, laboratory values for intact specimens must be employed with proper judgment in engineering applications.

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.

Concrete – Upgradings for Compression Testers: