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point load test on rock

point load test on rock

Point Load Test on Meta-Sedimentary Rocks and

2012-8-21 · Rock Mechanics and Rock Engineering - where F is the size correction factor, F = (D e /50) 0.45; I s is the uncorrelated point load strength, MPa; and D e is the “equivalent core diameter” in mm, which is related to the test type. For example, D 2 e = D 2 for diametral tests and D 2 e = 4A/π for axial, block, and lump tests, where A = WD = minimum cross-sectional area of a plane through ...

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

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

Study on Rock Strength Characteristic by Point Load Test ...

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 ...

(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

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

2018-11-15 · load strength index of rock cores. However, in tests on many different rock types, the ratio can vary between 15 and 50 especially for anisotropic rocks, so that errors of up to 100 percent are possible in using an arbitrary ratio value to predict compressive strength from point load strength. The point load strength test is a form of

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 ...

Laboratory Testing and Interpretation of Rock Properties

2012-5-29 · Common laboratory tests for intact rocks include measu rements of strength (point load index, compressive strength, Brazilian test, direct shear), stiffness (ultrasonics, elastic modulus), and durability (slaking, abrasion). Table 8-1 gives a summary list of laboratory rock tests and procedures by ASTM. Brief sections

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

2021-11-24 · 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

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

2021-11-24 · 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

Point Load Tester for Rock Specimens - Humboldt Mfg

2021-11-16 · The point Load Tester is used to determine the strength values of a rock specimen, both in the field and in the laboratory. It consists of a load frame for applying loads up to 55kN, a mounted hydraulic ram and a pressure gauge with 0.001kN precision for maximum load indication.

Point Load Tester PLT-10 | Rock Strength Testing ...

The Geosystems PLT-10 is the safest machine on the market. In some Australian iron ore projects, the grade is high resulting in a very high strength rock that 50kN or 70kN units cannot cope with. With a rating of up to 10 ton (98kN) loads the PLT-10 is the perfect

The point load test for weak rock in dredging applications ...

The point load test is shown useful for weak/saturated rocks which are commonly encountered in mechanical dredging operation. To support the dredging use of the point load test, orginally intended to obtain a field strenth index for hard rock materials, a comparative, testing program was initiated, which included more than four hundred rock tests.

Point Load Index Tester - Tinius Olsen

The Point Load Index Tester is used for determining the diametral point load strength index of rock cores and irregular lumps, which can be tested without any treatment. The Point Load Test is primarily an index test for strength classification of rock materials. This instrument is mainly intended for field measurements on rock specimens []

(PDF) Correlation between uniaxial strength and point load ...

2021-11-12 · The point load index test is based on the principle that rock sample is broken between two conical platens. Failure load and specimen dimensions are used to calculate the point load strength index.

Standard Test Method for Determination of the Point Load ...

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 ...

A Hand-Portable Point Load Tester For Field

The point load test is a widely accepted index for the quick field evaluation of the compressive strength of drill core and rock fragments. The test, as described by D'Andrea, et al, 1965 (U.S.B.M. RI- 6702), involves breaking a core specimen, or a series of irregular rock fragments, between conical platens of stipulated geometry and measuring ...

Laboratory Testing and Interpretation of Rock Properties

2012-5-29 · Common laboratory tests for intact rocks include measu rements of strength (point load index, compressive strength, Brazilian test, direct shear), stiffness (ultrasonics, elastic modulus), and durability (slaking, abrasion). Table 8-1 gives a summary list of laboratory rock tests and procedures by ASTM. Brief sections

8. STRENGTH OF SOILS AND ROCKS

2009-2-23 · 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 separation between the platens, the point load strength ...

Point Load Tester for Rock Specimens - Humboldt Mfg

2021-11-16 · The point Load Tester is used to determine the strength values of a rock specimen, both in the field and in the laboratory. It consists of a load frame for applying loads up to 55kN, a mounted hydraulic ram and a pressure gauge with 0.001kN precision for maximum load indication.

Case study: using the point load test to estimate rock ...

2017-12-1 · Rock strength is one of the most important parameters in geotechnical engineering. During excavation using a tunnel boring machine (TBM), a rapid and effective method to estimate rock strength is needed. The TBM muck produced during excavation contains blocky fragments which are suitable for a point load test (PLT). To use the PLT on blocky fragments to estimate rock strength, it is necessary ...

Point Load Test – Dubai Burj Khalifas

2021-11-13 · 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. test apparatus.

Table 1 from Using the point load test to determine the ...

2000-8-1 · 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

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

Guidelines on Rock Identification-1

2021-10-14 · 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)

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

Point load strength index, Physical property ...

2018-7-1 · The numbers of specimens tested were 3,828 rock specimens for the point load strength test. These came primarily from the earth’s surface in ancient hydrothermal fields. The rock specimens underwent point load strength test using a laboratory testing machine with specimens in dry and saturated conditions.

A new method for evaluating the rock mass damage index ...

2019-3-6 · In this study, point load strength tests were performed on irregular rock blocks using a digital point load test system according to the guidelines of the ASTM . The study site was the Huize lead and zinc mine, straddling the provinces of YunNan and GuiZhou in southwest China, as shown in figure 1. Figure 1. Study area.

CLASSIFICATION // CHARACTERIZATION OF SOME

2015-2-13 · Knowing the rock type and rock material hardness, it is possible for the experienced engineer or engineering geologist to make fairly accurate estimates on rock material strength. These can be readily verified by uniaxial compressive strength or point load tests.