ASTM D7012 PDF

26 Nov ASTM D Method C. Reference. Uniaxial Compressive Strength of Intact Rock Core Specimens. (deg). Type. Failure Mode. Rock Type. All the Controls products ASTM D standard. Enter now!. ASTM D Standard Test Methods for Compressive Strength and Elastic Moduli of Intact Rock Core Specimens under Varying States of Stress and.

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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. Historical Version s – view previous versions of standard. It performs either uniaxial or triaxial tests under 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.

The Rock core should have a diameter from Hoek cells and sample extruder The Hoek triaxial cells are offered in five models of different aatm each one consists of the following: The tests provide data in determining the strength of rock, namely: Thus, the strength values determined are in terms of total stress and are not corrected for pore pressures.

The original four standards are now referred to as Methods in this standard. Gshear modulus,Kbulk modulus, EYoung’s modulus, and Poisson’s ratio. The elastic constants Methods B and D are used to calculate the stress and deformation in rock structures. S7012 mechanics – Highly advanced rock testing systems: Elastic moduli measured by sonic methods Test Method D may often be employed as preliminary measures of anisotropy.

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ASTM D, Test equipment Controls

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. These test methods do not include the procedures necessary to obtain a stress-strain curve beyond the ultimate strength. These test methods do not ashm the procedures necessary to obtain a stress-strain curve beyond the ultimate strength.

The 2 consoles are operated independently and the Platens surface hardness certificate The standards prescribe a minimum surface hardness depending on the type of test to be performed. Link to Active This link will always route to the current Active version of the standard.

It should be observed that these methods make no provision for pore pressure measurements and specimens are undrained platens are not vented. Link to Active This link will always route to the current Active version of the standard. Thus the strength values determined are in terms of total stress, that is, are not corrected for pore pressures.

In addition, they are representative of the significant digits that generally should be retained. 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. No other units of measurement are included in this standard. It is beyond the scope of this standard to consider significant digits used in analytical methods for engineering design.

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Method A, triaxial compression test, is commonly used to simulate the stress conditions under which most underground rock masses exist.

The tests provide data in determining the strength of rock, namely: The elastic moduli for such rocks should be determined from unload-reload cycles, that are not covered by this test method.

The test system comprehends: Thus the strength values determined are in terms of total stress, that is, are not corrected for pore pressures. Deformation and strength of rock are known to be functions of confining pressure.

Users of this adtm are cautioned that compliance with Practice D does not in itself ensure reliable results. Concrete – Upgradings for Compression Testers: Iva Company info Privacy policy Maintenance Spares Technical trainings Warranty Academy.

When required, the hardness verification is performed with certified instruments.