[5] ASTM-D7012-14 2014 Compressive Strength and Elastic Moduli of Inta ct Rock Core Specimens under Varying States of Stress ASTM pp 1 – 9 [6] C Chang, M D Zoback, and A Khaksar 2006 J. Pet. Sci ...
Standard Test Methods for Compressive Strength and Elastic Moduli of Intact Rock Core Specimens under Varying States of Stress and Temperatures
The rock uniaxial compressive strength (UCS) is the basic parameter for support designs in underground engineering. In particular, the rock UCS should be obtained rapidly for underground ...
3.1.1 Uniaxial Compressive Strength ofIntact Rock Material (qc) The strength of the intact rock material should be obtained from rock cores in accordance with IS 9143or IS 8764orIS 10785 as applicablebasedon ... ofrock core to = ~ = = = ~ =+ = < > = + = 'to = = rock mass =S = 1; + =a. of rock mass 1-- ...
The uniaxial compressive strength (UCS) is classified as one of the basic mechanical properties of rocks, which is widely used in mining and construction practice.
1. Introduction. Uniaxial compressive strength (UCS) has been considered a key mechanical parameter for the use of rock in engineering projects such as civil, mining, petroleum engineering, etc.
Classifications of intact rock, based on compressive strength and modulus ratio (Young's modulus/compressive strength), developed by and Miller, are given in Tables 2 and 3, respectively. The very high strength category in Table 2 includes rocks like basalt, diabase, and quartzite. Other igneous rocks, limestone, dolomite, and well ...
1.1 To establish a procedure for testing the unconfined compressive strength of rock core specimens. 2.0 SCOPE 2.1 This procedure shall apply to nominal 2-inch (51 mm) diameter rock core specimens obtained for the purpose of determining the uniaxial compressive strength of rock.
The compressive strength of the interlayer in the type I composite rock specimen was lower than that in type II composite rock specimen. A schematic diagram of type I and type II is shown in Fig. 2 .
1.5 This standard replaces and combines the following Standard Test Methods: D2664 Triaxial Compressive Strength of Undrained Rock Core Specimens Without Pore Pressure Measurements; D5407 Elastic Moduli of Undrained Rock Core Specimens in Triaxial Compression Without Pore Pressure Measurements; D2938 …
The rock uniaxial compressive strength (UCS) is an indispensable parameter in rock mass stability analysis, underground chamber excavation, and support design for transportation, mines, and …
ASTM D2938 – Standard Test Method for Unconfined Compressive Strength of Intact Rock Core Specimens Scope This test method specifies the apparatus, instrumentation, and procedures for determining unconfined compressive strength of …
Point Load test is an alternate method that can be used to adequately predict the uniaxial compressive strength of a rock material using a portable and simpler equipment. Schmidt Hammer Rebound test is also …
This guide summarizes practices for obtaining cores and interpreting core compressive strength test results. Factors that affect in-place concrete strength are reviewed so …
Based on the assessment of the condition of the rock, skin friction, and end bearing of the rock are calculated. These are made based on the test such as uniaxial compressive strength tests and based on the rock quality parameters such as RQD and Core Recovery.
Compressive strength (qu = F u) of core in unconfined compression (uniaxial compression test) - D 2938* Triaxial compressive strength without pore pressure T 226 D 2664 Creep ... Purpose To determine the uniaxial compressive strength of rock (qu = F u = F C). Procedure In this test, cylindrical rock specimens are tested in compression …
In order to utilize the Equotip hardness tester, originally developed in the field of metallic engineering, as an indirect method to predict the unconfined compressive strength (UCS) of rock, laboratory tests were undertaken to establish the UCS, Equotip hardness (L-value) and porosity of nine rock types. Using existing data from Verwaal …
Empirical relationships for estimating Uniaxial Compressive Strength (UCS) of rock from other rock properties are numerous in literature. This is because the laboratory procedure for determination of UCS from compression tests is cumbersome, time consuming, and often considered expensive, especially for small to medium-sized …
REFERENCES 1. International Society for Rock Mechanics. Committee on Labor- atory Tests. Suggested method for determining the uniaxial com- pressive strength of rock material. Document No. 1, first revision (March 1977). 2. ASTM. Standard method of test for triaxial compressive strength of undrained rock core specimens without pore …
Rock engineering tasks like tunnelling, dam and building construction, and rock slope stability rely heavily on properly estimating the rock's uniaxial compressive strength (UCS), a crucial rock geomechanical characteristic. As high-quality specimen are not always possible, scientists often estimate UCS indirectly. The primary objective of …
RMS T229 Unconfined Compressive Strength of Rock Core . Material Evaluation – Rock (Australian Standards) AS 4133 1.1.1 Determination of Rock Moisture Content of Rock – Oven Drying Method. AS 4133 2.1.1 Determination of rock porosity and dry density – Saturation and calliper techniques.
The unconfined compressive strength (UCS) of rocks is a crucial factor in geotechnical engineering, assuming a central role in various civil engineering …
Since in many cases RQD is the only information available for describing rock discontinuities, this paper focuses on the determination of RQD and its utilization for evaluating the engineering properties (mainly deformation modulus and unconfined compressive strength) of rock masses.
The unconfined compressive strength (UCS) of rocks is a crucial factor in geotechnical engineering, assuming a central role in various civil engineering undertakings, including tunnel construction, mining operations, and the design of foundations. The precision in forecasting UCS holds paramount importance in upholding the security and …
Extensive efforts have been devoted to derive rock mechanical properties from the Schmidt hammer rebound index (R) performed on core samples.From R measurements, the uniaxial compressive strength of rock (σ c) can be calculated by means of several mathematical expressions, as reported in Table 1.
Compressive Strength of Selected Construction Materials as Specified in Several Current International/National and ... unconfined compressive strength of intact rock core specimen . Replaced . ASTM D7012-14 Standard test method for …
Significance and Use 5.1 The uniaxial compression test (see Test Method D7012) is used to determine compressive strength of rock specimens. However, it is a time-consuming and expensive test that requires significant specimen preparation and …
The rock mechanical (strength) parameters typically required to populate a geomechanical model that is based on the linear Mohr-Coulomb failure criterion are unconfined compressive strength (UCS), friction angle or coefficient of internal friction, and thick-wall- (hollow) cylinder (TWC) strength, which may be needed for sanding …
This test method specifies the apparatus, instrumentation, and procedures for determining unconfined compressive strength of intact rock core specimens. This procedure is identical to ASTM D 2938 …
Intact Rock • Strength classification is based on strength of the rock (compressive strength & modulus of elasticity; Table 7.2) • 5 strength classes: A-E based on the overall rock strength; A = very strong, E = very weak (Table 7.3) • Any discontinuities, fractures, bedding planes, etc. will
Estimating compressive strength. General rock failure criterion can be reduced to a few parameters dependent on lithology (m) and the uniaxial compressive strength (C 0).Lithology is commonly derived during log analysis, so m may be estimated (Table 1).What is needed still is an initial measure of rock strength provided by C 0. C …
1.1 These test methods cover the determination of the strength of intact rock core specimens in uniaxial and triaxial compression. The tests provide data in determining the strength of rock, namely: the uniaxial strength, shear strengths at different pressures and different elevated temperatures, angle of internal friction, (angle …
1.1 This test method specifies the apparatus, instrumentation, and procedures for determining unconfined compressive strength of intact rock core specimens.
Uniaxial compressive strength (UCS) is a key physical test relevant to iron ore crusher design and rock geomechanics for mining. Tests are typically performed on intact …
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