### Measurement Uncertainty in Testing of Uniaxial Compressive ...

determination of concrete and metallic material compressive strength and deformability. Keywords: uniaxial compressive strength, deformability, rock samples, uncertainty 1. INTRODUCTION NE of the basic and most used methods of testing which is performed on rock samples is determination of uniaxial compressive strength and deformability. The

### Rock mechanical properties - petrowiki.org

The determination of a reservoir’s mechanical properties is critical to reducing drilling risk and maximizing well and reservoir productivity. ... is the ratio of uniaxial compressive (tensile) stress to the resultant strain; ... Compressive strength of rocks. Compressional and shear velocities.

### Compressive strength - Wikipedia

Compressive strength or compression strength is the capacity of a material or structure to withstand loads tending to reduce size, as opposed to tensile strength, …

### Prediction of Uniaxial Compressive Strength Using Point ...

comparing with uniaxial compressive test. Lot of researchers comes out with a lot of correlations between uniaxial compressive strength and point load index for intact rocks. But there is only few reported research work in jointed rocks. So here with present study to create a equation relating uniaxial compressive strength

### Predicting the Uniaxial Compressive Strength and Static ...

The uniaxial compressive and the ultrasonic tests were carried out on 64 samples of sedimentary rocks and, after regression analysis of the test results; best fit equations for predicting the uniaxial compressive strength and static Young’s modulus of these samples are proposed.

### Correlation between Uniaxial Compressive Strength and ...

indirect measure of the compressive or tensile strength of the rock. D’Andrea et al.[4] performed uniaxial compression and the point load tests on a variety of rocks. They found the following linear regression model to correlate the UCS and Is(50). qu = 16.3 + 15.3 Is(50) where qu = Uniaxial Compressive Strength of rock.

### Assessing Rock Compressive Strength and Predicting ...

Compressive Strength (UCS). It is one of the most basic parameters of rock strength, and most common determination performed for boreability predictions. The unconfined (or uniaxial) compressive strength (UCS) of a rock is a common measure of the strength of intact rock. It is normally measured on cylinders of rock core by

### Correlation between point load index and compressive ...

The relationship of the point load test with uniaxial compressive strength was examined using quartzite rocks to substantiate the existing correlations. Unable to display preview. Download preview PDF. Unable to display preview. Download preview PDF. Hassani, F.P., …

### Empirical relations between rock strength and physical ...

In this study, 31 empirical equations are summarized that relate unconfined compressive strength and internal friction angle of sedimentary rocks (sandstone, shale, and limestone and dolomite) to physical properties (such as velocity, modulus, and porosity).

### A predictive model for uniaxial compressive strength of ...

A predictive model for uniaxial compressive strength of carbonate rocks from Schmidt hardness Abstract Uniaxial compressive strength (UCS) is considered to be one of the important parameters in rock engineering projects. In order to determine UCS, direct and …

### Estimating Unconfined Compressive Strength of Sedimentary ...

Broch and Franklin [3] found out that for 50 mm diameter cores the uniaxial compressive strength is approx-imately equal to 24 times the point load index. They also developed a size correction chart so that core of vari-ous diameters could be used for strength determination. Another study by D’Andrea et al. [4] relating uniaxial

### ASTM D7012 - Standard Test Methods for Compressive ...

scope: These four test methods cover the determination of the strength of intact rock core specimens in uniaxial and triaxial compression. Methods A and B determine the triaxial compressive strength at different pressures and Methods C and D determine the unconfined, uniaxial strength.

### Uniaxial compressive rock strength determination - Proceq

Uniaxial compressive rock strength determination Rebound hardness is perhaps the most frequently method used in rock testing to determine uniax-ial compressive strength (UCS). Proceq's RockSchmidt provides not only the possibility of obtain-ing the UCS, but also of sending the complete register data and report direct to the computer.

### compressive strength of a rock - ellul.nl

Definition of uniaxial compressive strength of a rock mass The Generalized Hoek-Brown criterion is written as a ci ci m b s = + + s s s s s ' ' ' 3 1 3 (1) where s1 ' and s3 ' are the major and minor principal stresses respectively. sci is the uniaxial compressive strength of the intact rock pieces. Get Price

### Rock mass properties - rocscience.com

coefficient of determination 2 r ... ** Point load tests on rocks with a uniaxial compressive strength below 25 MPa are likely to yield highly ambiguous results. Table 3: Values of the constant m i for intact rock, by rock group. Note that values in parenthesis are estimates.

### equipment and machine for unconfined compression tests on ...

Measurement Uncertainty in Testing of Uniaxial Compressive Strength and Deformability of Rock … rock sample uniaxial compressive strength and deformability. The interdependence of uncertainty contribution is analyzed and ... diameter is placed in the compression test machine and compressive force is applied to the sample.

### STRENGTH PROPERTIES OF ROCKS AND ROCK MASSES 1 ...

STRENGTH PROPERTIES OF ROCKS AND ROCK MASSES 1. INTRODUCTION 2. TESTING OF INTACT ROCK FOR STRENGTH 2.1 Uniaxial Compression 2.2 Point Load Testing 2.3 Uniaxial Tension 2.4 Indirect Tension Tests 2.5 Shear Tests 2.6 Confined Compression Tests (Triaxial Tests) 2.7 Biaxial and Multiaxial Tests 2.8 Other Tests 3. PARAMETERS AFFECTING ROCK STRENGTH 4.

### Determination of Damage Constitutive Behavior for Rock ...

is also an important failure criterion of rock fracture. Compressive failure strength is one of the most widely investigated material properties of rock salt. It is now fairly well established that fracture of rock salt under uniaxial compression involves nucleation of microcracks from

### Determination of c and Φ of rocks from indirect tensile ...

Determination of c and Φ of rocks from indirect tensile strength and uniaxial compression tests Article (PDF Available) in International Journal of Geotechnical Engineering 8(1): 65 · January ...

### Course CEE9577 - Faculty of Engineering

of the uniaxial tensile and compressive strength of the rock and can easily be determined in the field or laboratory on rock lumps or cored samples. ... Note: N-size core is 50mm dia. Determination of Uniaxial Tensile Strength ...

### Determination of Shear Strength and Rock Mass Parameters ...

for determining the uniaxial compressive strength. Where is the compressive strength in MPa, and F is the load at failure in kN. According to Bell (1992), classification of intact rocks based on uniaxial compressive strength as suggested by ISRM is shown in Table 1. Table 1: Classification of intact rocks …

### Compressive strength of rocks - petrowiki.org

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.

### Estimation for the Uniaxial Compressive Strength of Rocks ...

Estimation for the Uniaxial Compressive Strength of Rocks in Korea using the Point Load Test ... Tziallas, G.P., Tsiambaos, G., Saroglou, H., 2009, Determination of rock strength and deformability of intact rocks, The Electronic Journal of Geotechnical Engineering, Vol. 14, 12.

### Estimating Unconfined Compressive Strength of Sedimentary ...

Broch and Franklin [3] found out that for 50 mm diameter cores the uniaxial compressive strength is approx-imately equal to 24 times the point load index. They also developed a size correction chart so that core of vari-ous diameters could be used for strength determination. Another study by D’Andrea et al. [4] relating uniaxial

### Rock Testing Lab Services, Rock Engineering | GeoTesting ...

GeoTesting Express utilizes state-of-the-art automated testing equipment to perform high-end strength testing of rock (Unconfined Compression, Direct Shear, Brazilian Tensile Strength…

### rock strength determine - perkinspreschool.com

· Determination of the compressive strength of rock in situ or in test . A new method for the determination of the compressive strength of rock σcin situ or in test blocks Tests for Determining the Physical Properties of Mine Rock.

### Suggested Methods for Determining the Uniaxial Compressive ...

the Uniaxial Compressive Strength and Deformability of Rock Materials PART 1. SUGGESTED METHOD FOR DETERMINATION OF THE UNIAXIAL COMPRESSIVE STRENGTH OF ROCK MATERIALS 1. SCOPE This method of test is intended to measure the uni- axial compressive strength of a rock sample in the form of specimens of regular geometry.

### Analysis of Young's modulus for Carboniferous sedimentary ...

Relationship between uniaxial compressive strength and average, secant and tangent modulus3.3.1. Regression analysis. Modulus ratio MR (or linear correlation) between uniaxial compressive strength and Young’s modulus can also be a factor which verifies Young’s modulus determination methodology .

### Uniaxial compression tests - SP

This and many other reports on unixial compression tests, conducted at SP, are published on SKB. Examples of standards. ISRM 1979, Suggested methods for determining the uniaxial compressive strength and deformability of rock materials. Int J Rock Mech Min Sci Geomech Abs 16(2), sid 140.

### IS 9143: Method for the determination ... - Internet Archive

In order to promote public education and public safety, equal justice for all, a better informed citizenry, the rule of law, world trade and world peace, this legal document is hereby made available on a noncommercial basis, as it is the right of all humans to know and speak the laws that govern them.

### (PDF) Determination of rock mass compressive strength ...

Introduction The rock mass compressive strength is a measure of the peak load carrying capacity of a rock mass (i.e stress driven failure) and is likely to be a fraction of the intact rock ...

### DETERMINATION OF RELATIONSHIP BETWEEN UNIAXIAL …

Outlining of host rock characterisation in terms of uniaxial compressive strength (UCS) and density is one of the fundamental aspects in a reservoir dam planning and design. Main host rocks of Iranian dams are carbonate rocks especially limestones and dolomites. Numerical models specifically based

### 8. STRENGTH OF SOILS AND ROCKS - …

towards any other strength parameter. (Bishop, 1966). In the case of concrete, the compressive strength is the most commonly measured strength parameter and this is also true of rock specimens. For the uniaxial or unconfined compressive strength test a right circular cylinder of the

### Estimation for the Uniaxial Compressive Strength of Rocks ...

However, the uniaxial compressive strength test is expensive and time consuming. Moreover, the uniaxial compressive strength test cannot be performed in the field. In order to solve this kind of problem, many foreign researchers investigated the use of the point load strength test for the estimation of uniaxial compressive strength of rock.

### Estimating thestrength ofrock materials - SAIMM

ingtheuniaxial compressive strength of rock for practical engineering purposes. Table IVlists the corres-ponding strength ranges for the strength classification of rock ma-terials8. ESTIMATION OF THE TRIAXIAL STRENGTH While determination ofthe uni-axial compressive strength ofrockis a simple matter, this is not true for the collection of the ...

### Standard Test Method for Determining Deformability and ...

Standard Test Method for Determining Deformability and Strength of Weak Rock by an In Situ Uniaxial Compressive Test1 This standard is issued under the ﬁxed designation D 4555; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision.

### ASTM-D7012 | Standard Test Methods for Compressive ...

1.1 These four test methods cover the determination of the strength of intact rock core specimens in uniaxial and triaxial compression. Methods A and B determine the triaxial compressive strength at different pressures and Methods C and D determine the unconfined, uniaxial strength.

### Uniaxial Compressive Strength of Antarctic Peninsula Rocks ...

The uniaxial compressive strength (UCS) is one of the important rock mechanics parameters for the determination of rock material strength and rock strength classification. However, it is a destructive and time consuming method as suggested by the International Society for Rock Mechanics, ISRM (1978). A few geomechanics related studies in

### ISRM Suggested Methods

ISRM Suggested Methods are "explanations of recommended procedures to follow in the various aspects of rock characterisation, testing and monitoring"*. The ISRM Suggested Methods downloaded are for the personal use of ISRM members. A complete list of all Suggested Methods is provided here.

### Standard Test Methods for Compressive Strength and Elastic ...

1.1 These four test methods cover the determination of the strength of intact rock core specimens in uniaxial and triaxial compression. Methods A and B determine the triaxial compressive strength at different pressures and Methods C and D determine the unconfined, uniaxial strength.