point load test on rock

Point Load Test | Geoengineer.org

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 a technique used for this purpose but, it is admitted that its results are far more variable and affected by testing methods.

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Standard Test Method for Determination of the Point

2016-9-20 · 5.2 The point load strength test is used as an index test for strength classification of rock materials. The test results should not be used for design or analytical purposes. 5.3 This test method is performed to determine the point load strength index of rock specimens and, if required, the point load strength anisotropy index.

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Point load test (PLT) - types and principles of testing

2 天前 · Point load test (PLT) The Point load test is an index test by which the rock is classified according to the strength. The test can be used to estimate other characteristics of intact rocks with which it correlates, such as uniaxial compressive and tensile strength. The test

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Point Load Test

The Point Load Test, also known as the Point Load Strength Index Test, is used to calculate the rock strength index of a rock specimen. From the rock strength index, other rock parameters, such as the uniaxial compressive strength, can be estimated.This test is very economical due to the simplicity of the apparatus and the minimal amount of required materials to execute.

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Point-load strength: An index for classification of rock ...

1991-10-1 · Point-load strength (Is) as a measure for the determination of rock strength and for estimating uniaxial (unconfined) compressive strength (UCS) are described and both put together and used for rock strength classification of brittle and hard rocks. The estimated point-load strength values of specimens of varying sizes and also the values corrected to a standard thickness of 50 mm, and the ...

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USING THE POINT LOAD TEST TO DETERMINE THE

2012-8-29 · The point load test (PLT) is an accepted rock mechanics testing procedure used for the calculation of a rock strength index. This index can be used to estimate other rock strength parameters. The focus of this paper is to present the data analysis used to correlate the point load test

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Study on Rock Strength Characteristic by Point Load

Test point load test requires relatively small load, its instrument is portable, it can be easily applied to on-site testing,which may pave the way for the development of the fieldstrength of rock mechanics test, widely promoted in engineering construction, has a large space for development. When selecting the uniform rock do the load and saturation points uniaxial compression test ...

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Standard Test Method for Determination of the Point

5.3 This test method is performed to determine the point load strength index of rock specimens and, if required, the point load strength anisotropy index. 5.4 Rock specimens in the form of either core (the diametral and axial tests), cut blocks (the block test), or irregular lumps (the irregular lump test) are tested by application of ...

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PIL-7 Point Load Tester | Roctest

Test Procedure. Three point load test configurations are used depending on the available rock specimens: Diametrical – Axial – Irregular lumpThe diametrical and axial tests use core specimens with length/diameter (L/D) ratios greater than 1.0 in the first case, and

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Point-load strength: An index for classification of rock ...

1991-10-1 · Point-load strength (Is) as a measure for the determination of rock strength and for estimating uniaxial (unconfined) compressive strength (UCS) are described and both put together and used for rock strength classification of brittle and hard rocks. The estimated point-load strength values of specimens of varying sizes and also the values corrected to a standard thickness of 50 mm, and the ...

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Guidelines on Rock Identification-1

2020-5-12 · 3.7 Criterion 7: Point Load Test Index 7 4. Application of guidelines at piling site involving rock drilling 11 References 12 Appendix 1- Checklist for identification of rocks with weathering grade III or better Appendix 2 - Point load test on irregular rock lumps (template calculation sheet)

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IS 8764 (1998): Method of determination of point load ...

2018-11-15 · 'indirect tensile' test, but this is largely irrelevant to its primary role in rock classification and strength characterization. Is(50) is approximately 0.80 times the uniaxial tensile or Brazilian tensile strength. This standard is revision and synthesis of two old standard on point load strength index and point load lump strength index.

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PIL-7 Point Load Tester | Roctest

Test Procedure. Three point load test configurations are used depending on the available rock specimens: Diametrical – Axial – Irregular lumpThe diametrical and axial tests use core specimens with length/diameter (L/D) ratios greater than 1.0 in the first case, and between 0.3 and 1.0 in

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Study on Rock Strength Characteristic by Point Load

Test point load test requires relatively small load, its instrument is portable, it can be easily applied to on-site testing,which may pave the way for the development of the fieldstrength of rock mechanics test, widely promoted in engineering construction, has a large space for development. When selecting the uniform rock do the load and saturation points uniaxial compression test ...

Read More+

Point load testing of weak rocks with particular

The Point Load Test (PLT) was developed as an index test to predict the Uniaxial Compressive Strength (UCS) of core too broken for UCS testing. A correlation factor ( K ) between UCS and PLT strength of 24 has been proposed although this value is disputed. This paper investigates the value of K for chalk and other weak rocks using published and unpublished data sets and concludes that K is not ...

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Evaluation of the Point Load Test for Rock

2019-12-12 · A commercially available point load test apparatus was purchased and used in a testing program on NX cores from the major types of sedimentary rock found in Missouri. Point load testing was performed in both axial and diametral orientations with unconfined compression tests performed for

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Test method T223 - Roads and Maritime Services

2013-1-8 · The Point Load strength test is based on the indirect tensile strength test or rock core by fracturing a specimen of rock using a machine equipped with conical platens and a load measuring system. the test provides a Point Load Strength (I

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Standard Test Method for Determination of the Point

5.4 Rock specimens in the form of either core (the diametral and axial tests), cut blocks (the block test), or irregular lumps (the irregular lump test) are tested by application of concentrated load through a pair of truncated, conical platens. Little or no specimen preparation is needed and can therefore be tested shortly after being obtained and any influence of moisture condition on the ...

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Rock testing - SlideShare

2018-6-28 · • Test can be conducted on dry or 2 days soaked specimens. • Point load Index Is= P/ D2 • Anisotropic specimen test along and across the bedding plane Type of rock Point Load index Is (Mpa) Dolomite 6-11 Limestone 0.25-8 Shale 0.2-8 Volcanic rocks 3

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Guidelines on Rock Identification-1

2020-5-12 · 3.7 Criterion 7: Point Load Test Index 7 4. Application of guidelines at piling site involving rock drilling 11 References 12 Appendix 1- Checklist for identification of rocks with weathering grade III or better Appendix 2 - Point load test on irregular rock lumps (template calculation sheet)

Read More+

Evaluation of the Point Load Test for Rock

2019-12-12 · A commercially available point load test apparatus was purchased and used in a testing program on NX cores from the major types of sedimentary rock found in Missouri. Point load testing was performed in both axial and diametral orientations with unconfined compression tests performed for

Read More+

Study on Rock Strength Characteristic by Point Load

Test point load test requires relatively small load, its instrument is portable, it can be easily applied to on-site testing,which may pave the way for the development of the fieldstrength of rock mechanics test, widely promoted in engineering construction, has a large space for development. When selecting the uniform rock do the load and saturation points uniaxial compression test ...

Read More+

IS 8764 (1998): Method of determination of point load ...

2018-11-15 · 'indirect tensile' test, but this is largely irrelevant to its primary role in rock classification and strength characterization. Is(50) is approximately 0.80 times the uniaxial tensile or Brazilian tensile strength. This standard is revision and synthesis of two old standard on point load strength index and point load lump strength index.

Read More+

[PDF] Using the point load test to determine the

1 天前 · Point load testing is used to determine rock strength indexes in geotechnical practice. The point load test apparatus and procedure enables economical testing of core or lump rock samples in either a field or laboratory setting. In order to estimate uniaxial compressive strength, index-to-strength conversion factors are used. These factors have been proposed by various researchers and are ...

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Point load tests and strength measurements for brittle ...

2009-2-1 · There has been much research on the point load test, albeit mostly empirical, to establish suitable values of C for the wide variety of rock types. Fener et al. give a good summary of historical and recent work. However, due to the lack of an obvious connection between the test configuration, the stress fields which develop, and the mechanisms causing failure, theoretical explanations for the ...

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STANDARD OPERATING PROCEDURE No. 77 POINT

2012-6-19 · The Point-Load Strength Test. Int. J. Rock Mech. Min. Sci., 9, 669-697 (1972). Questa Rock Pile Stability Study SOP 77v3 Page 7 SOP 77v3 10/30/2008 APPENDIX I. International Society of Rock Mechanics (ISRM) – SUGGESTED METHOD FOR DETERMINING POINT LOAD STRENGTH. Questa Rock Pile Stability Study SOP 77v3 Page 8 ...

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STRENGTH PROPERTIES OF ROCKS AND ROCK MASSES 1 ...

2006-3-19 · Broch and Franklin (1972) proposed a testing method called the Point Load Test. The test consists of squeezing pieces of rock diametrically between two hardened steel cones. The test set-up is shown in Figure 1. For these tests, rock pieces must have a length at least 1.4 times their diameter (Figure 2a). The point load index, Id, is equal to

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Point load testing of weak rocks with particular

The Point Load Test (PLT) was developed as an index test to predict the Uniaxial Compressive Strength (UCS) of core too broken for UCS testing. A correlation factor (K) between UCS and PLT strength of 24 has been proposed although this value is disputed.

Read More+

Point-Load Test | SGS

The Point-load Test measures the Point Load Strength Index (Is(50)) of rock specimens, and their Strength Anisotropy Index (Ia(50)), which is the ratio of Point Load Strengths in directions that give the greatest and least values. Rock specimens in the form of core (diametral and axial tests), cut blocks (block test), or irregular lumps ...

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