point load test for granite rock

point load test for granite rock

Jaw Crusher

As a classic primary crusher with stable performances, Jaw Crusher is widely used to crush metallic and non-metallic ores as well as building aggregates or to make artificial sand.

Input Size: 0-1020mm
Capacity: 45-800TPH

Materials:
Granite, marble, basalt, limestone, quartz, pebble, copper ore, iron ore

Application:
Jaw crusher is widely used in various materials processing of mining &construction industries, such as it is suit for crushing granite, marble, basalt, limestone, quartz, cobble, iron ore, copper ore, and some other mineral &rocks.

Features:
1. Simple structure, easy maintenance;
2. Stable performance, high capacity;
3. Even final particles and high crushing ratio;
4. Adopt advanced manufacturing technique and high-end materials;

Technical Specs

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STRENGTH CLASSIFICATION OF GRANITE USING POINT LOAD

Jun 01, 2014 The point load test (PLT) is used to determine rock strength indexes in geotechnical practice. An attractive alternative to the UCS because it can provide a similar data but in a lower cost. It must correct to the standard equivalent diameter (De) of 50 mm. Smaller forces are needed, and a small and portable testing

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USING THE POINT LOAD TEST TO DETERMINE THE UNIAXIAL

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 index (Is50) with

get price

Evaluation of the Point Load Test for Rock

In that the point load test is related to various other' tensile tests for concrete and rock, the direct origins of the point load test are somewhat uncertain. In one of the earliest references available, a Russian, Protodyakonov (1), reported testing irregular rock specimens roughly shaped by hammering.

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Point load strength index of granitic irregular lumps

Nov 01, 2017 These studies at The Hong Kong Polytechnic University provided the first theoretical basis for testing anisotropic irregular lumps. For Hong Kong rocks, axial point load strength tests on granite and tuff were carried out by Chau and Wong, 1995, Chau and Wong, 1996.

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Point Load Test Geoengineer

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 OPERATING PROCEDURE No. 77 POINT LOAD

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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Point load test (PLT) types and principles of testing

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 determines the strength index values at a point (Is (50)) and the anisotropy index (Ia (50)).

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Correlation between the point load index (Is(50)) and the

3.2 POINT LOAD TEST (PLT) The Point Load Test is also known as the Franklin test. The first reference is by Reichmuth, D. (1968) [10], who proposed obtaining the resistance to a point load and a determination of the unconfined compression strength via correlation, regardless of whether they are irregular, regular, or cylindrical rock controls [11].

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STRENGTH PROPERTIES OF ROCKS AND ROCK MASSES 1

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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Guidelines on Rock Identification-1

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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STANDARD OPERATING PROCEDURE No. 77 POINT LOAD

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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Point Load Test on Meta-Sedimentary Rocks and Correlation

Aug 21, 2012 The very high rock strength is associated with the production of rock fragments ejected out at a high speed and a loud cracking sound during the point load test. Correlation to UCS and BTS Ma and Wu ( 2010 ) have carried out uniaxial compressive tests on the meta-sedimentary rocks under both air-dried and saturated testing status.

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Point Load Test of Half-Cylinder Core Using the Numerical

The point load test (PLT) is intended as an index test for rock strength classification or estimations of other strength parameters because it is economical and simple to conduct in the laboratory and in field tests. In the literature, calculation procedures for cylinder cores, blocks, or irregular lumps can be found, but no study has researched such procedures for half-cylinder cores.

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8. STRENGTH OF SOILS AND ROCKS

The point load strength test may be used to provide an indirect measurement of tensile strength, but it is more commonly used as an index test. The point loading is applied to rock core specimens or to irregular rock fragments in a testing machine. If P is the failure load and D is the Stone Mt. granite 55.1 51.0 0 69 Indiana limestone 6

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(PDF) Assessment of mechanical properties of granite

Granite is the dominant granitic rock in most quarries, but significant microgranite and minor pegmatites occur in some quarries. Point load test was carried out axially on cylindrical samples

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(PDF) Rock failure modes under uniaxial compression

With due need, this paper analyzes the failure modes of granite, schist, and sandstone under uniaxial compression, Brazilian, and point load tests in relation to corresponding strengths.

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Laboratory Testing and Interpretation of Rock Properties

Point Load Index (Strength) ASTM D 5731 Purpose To determine strength classification of rock materials through an index test. Procedure Rock specimens in the form of core (dia metral and axial), cut blocks or irregular lumps are broken by application of concentrated lo ad through a pair of spherically truncated, conical platens.

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Correlation between Uniaxial Compressive Strength and

The point load test has been reported as an 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 =

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IS 8764: Method of determination of point load strength

Section Name: Rock Mechanics (CED 48) Designator of Legally Binding Document: IS 8764 Title of Legally Binding Document: Method of determination of point load strength index of rocks Number of Amendments: 2 Equivalence: Superceding: Superceded by: LEGALLY BINDING DOCUMENT Step Out From the Old to the New--Jawaharlal Nehru Invent a new India

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MinE 323-Point load strength Index (lab 1) YouTube

Jun 19, 2018 About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright Contact us Creators

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Calculation for tensile strength and fracture toughness of

Mar 29, 2018 Tensile strength and fracture toughness, important parameters of the rock for engineering applications are difficult to measure. Thus this paper selected three kinds of granite samples (grain sizes = 1.01mm, 2.12mm and 3mm), used the combined experiments of physical and numerical simulation (RFPA-DIP version) to conduct three-point-bending (3-p-b) tests with different notches and

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Physical Properties, Strength and Durability of Selected

were determined. For mechanical strength, point load test and for chemical properties acid immersion test, salt crystallization test, methylene blue adsorption test and ethylene glycol soak test were carried out. Rocks of quartzite, granite, marble and dolomite showed higher strength values whereas rocks of quartzite, amphibolite

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Rock failure modes under uniaxial compression, Brazilian

Nov 16, 2013 Specimen preparation. The collected cores were saw-cut into uniaxial compression, Brazilian, and point load test specimens. It is known that the failure mode of a rock specimen under uniaxial compression depends also on the degree of the end constraints of the specimen offered by the platens of the testing machine and the surface quality of the parallel ends of the specimen (Vutukuri

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CORRELATION BETWEEN UNIAXIAL COMPRESSIVE STRENGTH

compressive strength (UCS) to the point-load index strength (Is 50) reported by various authors 18 3.1 Dimension of the limestone and granite samples for uniaxial compressive test (UCT) 25 3.2 Dimension of the limestone and granite for point-load index strength test 35 4.1 Results of point-load index strength test for limestone 39

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STRENGTH CLASSIFICATION OF GRANITE USING POINT LOAD TEST

Jun 01, 2014 The point load test (PLT) is used to determine rock strength indexes in geotechnical practice. An attractive alternative to the UCS because it can provide a similar data but in a lower cost. It must correct to the standard equivalent diameter (De) of 50 mm. Smaller forces are needed, and a small and portable testing

get price

A dynamic point-load test for quantifying rock dynamic

The point-load test (PLT) has been widely used in the field and in the laboratory to estimate the strength of rock materials. The PLT is easy and quick to perform and it is suitable for samples with irregular shapes and therefore has found wide applications. The measured point-load strength (PLS) is

get price

USING THE POINT LOAD TEST TO DETERMINE THE UNIAXIAL

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 index (Is50) with

get price

Point load strength index of granitic irregular lumps

Nov 01, 2017 These studies at The Hong Kong Polytechnic University provided the first theoretical basis for testing anisotropic irregular lumps. For Hong Kong rocks, axial point load strength tests on granite and tuff were carried out by Chau and Wong, 1995, Chau and Wong, 1996.

get price

Evaluation of the Point Load Test for Rock

In that the point load test is related to various other' tensile tests for concrete and rock, the direct origins of the point load test are somewhat uncertain. In one of the earliest references available, a Russian, Protodyakonov (1), reported testing irregular rock specimens roughly shaped by hammering.

get price

Point Load Test Geoengineer

Introduction. Point Load (PL) is a test that aims at characterizing rock materials in terms of strength. It is an index test, meaning that it can be performed relatively quickly and without the necessity of sophisticated equipment to provide important data on the mechanical properties of rocks.

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STANDARD OPERATING PROCEDURE No. 77 POINT LOAD

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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(PDF) POINT LOAD TEST LAB REPORT ResearchGate

Collected from [ CITA TION Ein72 \l 2057 ] ‘’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

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STRENGTH PROPERTIES OF ROCKS AND ROCK MASSES 1

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

get price

Guidelines on Rock Identification-1

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)

get price

Correlation between the point load index (Is(50)) and the

3.2 POINT LOAD TEST (PLT) The Point Load Test is also known as the Franklin test. The first reference is by Reichmuth, D. (1968) [10], who proposed obtaining the resistance to a point load and a determination of the unconfined compression strength via correlation, regardless of whether they are irregular, regular, or cylindrical rock controls [11].

get price

8. STRENGTH OF SOILS AND ROCKS

The point load strength test may be used to provide an indirect measurement of tensile strength, but it is more commonly used as an index test. The point loading is applied to rock core specimens or to irregular rock fragments in a testing machine. If P is the failure load and D is the Stone Mt. granite 55.1 51.0 0 69 Indiana limestone 6

get price

Uniaxial compressive strength and point load strength of rocks

Feb 01, 1996 The Brazilian test is carried out to determine the indirect tensile strength (To) of rocks. The diameter of rock specimens is 60 mm (i.e. D = 60 mm). The diameter to length ratio (D : L) of the rock specimens for the uniaxial compression test, the point load test and the Brazilian test are 1:2.5, 1.1:1 and 2:1, respectively.

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(PDF) Assessment of mechanical properties of granite

Granite is the dominant granitic rock in most quarries, but significant microgranite and minor pegmatites occur in some quarries. Point load test was carried out axially on cylindrical samples

get price