point load test on rock

European Type Jaw Crusher

European Type Jaw Crusher is a new crushing machine, the jaw crusher manufacturer, after the release of traditional jaw crusher. This jaw crusher is a perfect combination of modern science and technology and the production practice, which can better satisfy the automatic production demands of vast customers.

Input Size: 0-930mm
Capacity: 12-650TPH

Materials:
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VSI6X Series Vertical Crusher

Due to the increasing market demand for the scale, intensification, energy conservation, environment protection and high-quality machine-made sand, a Chinese professional sand maker manufacturer, further optimizes the structure and function of traditional vertical-shaft impact crushers and launches a new generation of sand-making and reshaping machine with high efficiency and low costs --- VSI6X Series Vertical Crusher.

Input Size: 0-50mm
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LM Vertical Mill

 point load test on rock

High drying efficiency, Low running cost, Good environmental effect

LM Vertical Mill integrates crushing, drying, grinding, classifying and conveying together, and it is specialized in processing non-metallic minerals, pulverized coal and slag. Its coverage area is reduced by 50% compared with ball mill, and the energy consumption is saved by 30%-40% similarly.

Applications: Cement, coal, power plant desulfurization, metallurgy, chemical industry, non-metallic mineral, construction material, ceramics.

MTW Trapezium Mill

point load test on rock

Large capacity, Low consumption, Environmental friendly

MTW European Trapezium Mill has a large market share in the grinding industry. Whether bevel gear overall drive, inner automatic thin-oil lubricating system or arc air channel, these proprietary technologies makes machine advanced, humanized and green.

Applications: Cement, coal , power plant desulfurization, metallurgy, chemical industry, non-metallic mineral, construction material, ceramics.

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point load test on rock

Little abrasion wear, Long service life

Based on 30 years of development experience of grinding equipment, LM Heavy Industry produced LUM Series Superfine Vertical Roller Grinding Mill to make ultra-fine powder. The grinding roller doesn't contact with millstone usually, which makes abrasion little and service life longer.

Applications: Superfine dry powder of none-metal ores such as calcite, marble, limestone, coarse whiting, talc, barite and dolomite and so on.

point load test on rock

USING THE POINT LOAD TEST TO DETERMINE THE

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 the uniaxial compressive strength (UCS), and to propose

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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)). The anisotropy index represents the strength

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(PDF) The point-load strength test ResearchGate

The point load test (PLT) has been considered a flexible approach to estimate the uniaxial compressive strength (UCS) of rocks. Previously, empirical

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Evaluation of the Point Load Test for Rock

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 correlation. A similar series of tests was performed on homogeneous specimens made from mortar. Point load test data was analyzed to establish correlations to

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Point load testing of weak rocks with particular reference

01/05/1998 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

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(PDF) The point-load strength test ResearchGate

The point load test (PLT) has been considered a flexible approach to estimate the uniaxial compressive strength (UCS) of rocks. Previously, empirical

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Rock Testing Geolabs

Point Load Test (set of 10 individual determinations on one rock core or rock stick sample) (ASTM / ISRM : 2007 & In-house Technical Procedure TP35) £ 55.00 per sample: Moisture Content Usually one moisture content per sample regardless of number of PLT determinations + £ 7.00: Extra over item for specimen preparation. Rate will depend on sawing and/or re-coring to

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

The point load test is primarily an index test for strength classification of rock materials. Although it may be used in the laboratory, it is mainly intended for field measurements on rock core and lump specimens. The results of the test should be used to predict the uniaxial compressive strength of unweathered rock for the purpose ofRockMass Classification.

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Point Load Tester PLT-10 Rock Strength Testing

The field practical alternative is to undertake a quick and simple point load test to predict rock strength on the fresh core. Typically a point load test is performed alongside a drill rig. The alternative is to place the core sample in a core box and send it for lab testing. Modern advances on PLT machinery and transducer have improved accuracy resulting in a very convenient test

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

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]. This test has not been designed for soft rocks or with

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Laboratory Testing and Interpretation of Rock Properties

Note: *Routine rock test procedure described in this manual. 8 3 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,

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(PDF) Correlation between uniaxial strength and point load

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

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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 Rock Quality Designation (RQD) is often used as an indicator for assessment of weathering grade of rocks. RQD is defined as the sum of all sound rock pieces, each with minimum length of 100mm, divided by the total length of the core run, expressed as

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point load test on rock

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)).

get price

Point Load Tester PLT-10 Rock Strength Testing

The field practical alternative is to undertake a quick and simple point load test to predict rock strength on the fresh core. Typically a point load test is performed alongside a drill rig. The alternative is to place the core sample in a core box and send it for lab testing. Modern advances on PLT machinery and transducer have improved accuracy resulting in a very convenient test

get price

Point-load strength: An index for classification of rock

01/10/1991 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

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PIL-7 Point Load Tester Roctest

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 the second case. Rock pieces of suitable irregular shapes are used when cores are not available.

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[PDF] Using the point load test to determine the uniaxial

01/08/2000 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 dependent upon rock type. This study involved the extensive

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Rock Testing Equipment VJ Tech Limited

Rock Testing. The VJ Tech digital Point Load Tester (with separate hand held digital display) is used to determine the strength values of a rock specimen and can be used either in the field or the laboratory. It conforms to ISRM & ASTM D5731-08. We also supply Hoek Cells which are used to measure the strength of cylindrical rock specimens when

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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 Rock Quality Designation (RQD) is often used as an indicator for assessment of weathering grade of rocks. RQD is defined as the sum of all sound rock pieces, each with minimum length of 100mm, divided by the total length of the core run, expressed as

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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 separation between the platens, the point load strength index (I s) is defined as IS = P/D 2

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LABORATORY TESTS TO DETERMINE STRENGTH OF ROCKS

Ring Shear Test on Rocks. This test generally used to test Insitu rocks. It gives the shear strength of rock as a function of confining pressure. In this test the specimen doesn’t require perfect square or smooth ends. Load is applied parallel to the axis of core. As the load is applied to the plunger, 2 sets of complex fractures surfaces

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CLASSIFICATION // CHARACTERIZATION OF SOME ROCK FEATURES

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. A simple estimate can be made from the field test in Table 5. The hammer tests

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