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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Semi-automatic Uniaxial and Triaxial test system. 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. It should be observed that this method makes no provision for pore pressure measurements and specimens are undrained platens are not vented.
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. Methods A and B determine the triaxial compressive strength at different pressures and Methods C and D determine the unconfined, uniaxial strength. The original four standards are now referred to as Methods in this standard.
Platens surface hardness certificate The standards prescribe a minimum surface hardness depending on the type of test to be performed. Hoek cells and sample extruder The Hoek triaxial cells are offered in five models of different size; each one consists of the following: 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. Maintenance Spares Technical trainings Warranty Academy.
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.
This test method does not include the procedures necessary to obtain a stress-strain curve beyond the ultimate strength. Rock mechanics – Uniaxial and triaxial test systems: No other units of measurement are included in this standard.
ASTM D7012 – 14e1
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
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. The 2 consoles are operated independently and the It is beyond the scope of this standard to consider significant digits used in analytical methods for engineering design. Rock mechanics – Accessories for uniaxial and triaxial tests: Elastic moduli measured by sonic methods Test Method D may often be employed as preliminary measures of anisotropy.
Active view current version of standard.
Thus the strength values determined are in terms of total 7d012, that is, are not corrected for pore pressures. When required, the hardness verification is performed with certified instruments. Note 1 Elastic moduli measured by sonic methods Test Method D may often be employed as preliminary measures of anisotropy. It is the responsibility of d012 user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Deformation and strength of rock are known to be functions of confining pressure. Therefore, laboratory values for intact specimens must be employed with proper judgment in engineering applications.
Concrete – Upgradings for Compression Testers: Temperature Variation— Applies to any of the methods and allows for testing at temperatures above or below room temperature. Agencies that meet the criteria of Practice D are generally considered capable of competent and objective testing. Rock mechanics – Highly advanced rock testing systems: The Rock v7012 should have a diameter from Users of this standard are cautioned that compliance with Practice D does not in itself ensure reliable results.
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. These test methods do not include the procedures necessary to obtain a stress-strain curve beyond the ultimate strength.
ASTM D, Test equipment Controls
These methods make no provision for pore pressure measurements and specimens are undrained platens are not vented. Follow us YouTube LinkedIn.
Method A, triaxial compression test, is commonly used to simulate ashm stress conditions under which most underground rock masses exist. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
The elastic moduli for such rocks should be determined from unload-reload cycles, that are not covered by this test method. This option is identified by the Certificate code shown on the following table.
The test system comprehends: