ASTM D7012-23 PDF
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St ASTM D7012-23
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Ст ASTM D7012-23
Original standard ASTM D7012-23 in PDF full version. Additional info + preview on request
Full title and description
Standard Test Methods for Compressive Strength and Elastic Moduli of Intact Rock Core Specimens under Varying States of Stress and Temperatures — Designation: ASTM D7012-23. This standard consolidates multiple earlier rock-core strength and elastic-modulus test methods into a single document and defines four methods (A–D) plus an optional temperature variation (Option A) for determining compressive strength, Young’s modulus, Poisson’s ratio, and related parameters for intact rock core specimens.
Abstract
ASTM D7012-23 specifies four test methods to determine the compressive strength and elastic moduli of intact rock core specimens under uniaxial and triaxial conditions. Methods A and B address triaxial compressive strength (including shear parameters), and Methods C and D address unconfined/uniaxial strength and elastic moduli. Methods B and D include procedures for obtaining stress–strain behavior, Young’s modulus, and Poisson’s ratio; tests are specified as undrained (no pore-pressure correction). Option A allows testing at temperatures different from ambient when required.
General information
- Status: Published / Active
- Publication date: June 15, 2023
- Publisher: ASTM International
- ICS / categories: 13.080.20 (Physical properties of soil / rock mechanics)
- Edition / version: D7012-23 (current edition)
- Number of pages: 10 (approx.)
Note: Current edition approved in mid-June 2023; this revision incorporates and replaces several prior ASTM rock mechanics test standards.
Scope
The standard covers four test methods for determining the strength and elastic properties of intact rock core specimens under varying states of stress and (optionally) temperature. Method A: triaxial compressive strength (undrained, no pore-pressure measurement) — strength only. Method B: triaxial elastic moduli (stress–strain behavior, Young’s modulus, Poisson’s ratio). Method C: uniaxial (unconfined) compressive strength — strength only. Method D: uniaxial elastic moduli. Option A provides procedures for temperature-controlled testing. The standard replaces and consolidates older ASTM methods for triaxial/uniaxial strength and elastic-modulus measurements to provide a unified set of procedures for rock mechanics testing.
Key topics and requirements
- Four defined methods (A–D) covering triaxial and uniaxial strength and elastic-modulus measurements.
- Determination of compressive strength (triaxial and uniaxial), angle of internal friction, cohesion intercept where applicable.
- Measurement procedures for stress–axial strain and stress–lateral strain curves, Young’s modulus (E) and Poisson’s ratio (ν) in Methods B and D.
- Tests specified as undrained (platens not vented) — results reported in terms of total stress (no pore-pressure correction).
- Optional temperature variation (Option A) to allow testing above or below room temperature.
- Consolidation of earlier ASTM standards into a single designation to improve consistency and reduce duplication of procedures.
Typical use and users
ASTM D7012-23 is used by geotechnical and rock mechanics laboratories, academic researchers, civil and mining engineers, petroleum/geothermal engineers, and consultants performing laboratory characterization of intact rock core for design and analysis (e.g., slope stability, tunnelling, foundation, underground excavations, reservoir and wellbore stability). Laboratories use the standard to obtain comparable strength and elastic-modulus data for engineering design, numerical modelling, and material characterization.
Related standards
This standard consolidates and replaces the prior ASTM standards D2664, D5407, D2938, and D3148 (these earlier designations now correspond to Methods within D7012). It is published under the jurisdiction of ASTM Committee D18 on Soil and Rock, Subcommittee D18.12 on Rock Mechanics, and is intended to be used alongside other ASTM rock mechanics and geotechnical testing standards where applicable.
Keywords
compressive strength, elastic moduli, intact rock, rock core specimens, uniaxial compression, triaxial compression, Young’s modulus, Poisson’s ratio, undrained testing, temperature variation, rock mechanics, D7012-23
FAQ
Q: What is this standard?
A: ASTM D7012-23 is the ASTM designation for the consolidated Standard Test Methods for Compressive Strength and Elastic Moduli of Intact Rock Core Specimens under Varying States of Stress and Temperatures. It defines four test methods (A–D) and an optional temperature variation for measuring strength and elastic properties of rock core.
Q: What does it cover?
A: It covers procedures to determine triaxial and uniaxial compressive strength, stress–strain behavior, Young’s modulus, and Poisson’s ratio for intact rock core specimens, including methods for undrained triaxial testing and optional controlled-temperature testing.
Q: Who typically uses it?
A: Rock mechanics and geotechnical laboratories, engineering consultants, researchers, civil/mining/oil & gas engineers, and others involved in laboratory characterization of rock for design, analysis, and modelling.
Q: Is it current or superseded?
A: The D7012-23 edition (approved June 2023) is the current edition; it supersedes and combines several earlier ASTM rock-core test standards into the single D7012 document.
Q: Is it part of a series?
A: D7012 is published under ASTM Committee D18 (Soil and Rock) and Subcommittee D18.12 (Rock Mechanics). It consolidates several older ASTM test-method designations as Methods internal to this standard.
Q: What are the key keywords?
A: Compressive strength, elastic moduli, intact rock core, uniaxial, triaxial, Young’s modulus, Poisson’s ratio, undrained testing, temperature variation.