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effect of sizes on strength of granite rock

effect of sizes on strength of granite rock

Strain-rate effects on the strength and fragmentation size ...

2009-12-1  One of the significant dynamic features of materials, including rock mass, is the strain-rate sensitivity of their strength. Attewell and Rinehart have shown experimentally that the dynamic strength of rock mass increases with the increase in strain rate. The strength dependence of dolomite, limestone, granite, basalt and brittle aluminum on strain rate is presented in Fig. 1.

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The Effect of Aggregate Size on The Strength of Concrete

2017-9-26  concrete compressive strength at 28 days for the granite aggregate is 30 MPa [4]. Aggregate shape and texture can help to improve the strength of concrete. Spherical shape suitable for use and easy to compact concrete and also give higher strength if compare to flat form or flake form, sharp, long, uneven or angular. If

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Loading rate conditions and specimen size effect on ...

2018-11-9  To prepare rock specimens with different sizes, core cutters with the inner diameters of 32 mm and 54.7 mm (NX size) were used (Fig. 1).All of the rock core specimens were cut to have a same length to diameter ratio of 2 by using sawing machines (Fig. 2).The end faces of the cores and rock-like cementitious samples were smoothened to maintain precision within 0.02 mm and made

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Calculation for tensile strength and fracture toughness of ...

2018-3-29  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 introduced ...

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STRENGTH PROPERTIES OF ROCKS AND ROCK MASSES 1 ...

2006-3-19  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

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The Effect of Specimen Size on Strength and Other ...

2011-6-17  The effect of specimen size on the measured unconfined compressive strength and other mechanical properties has been studied by numerous researchers in the past, although much of this work has been based on specimens of non-standard dimensions and shapes, and over a limited size range. A review of the published literature was completed concentrating on the presentation of research

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The Effect of Mineralogical Composition on Strength and ...

2019-7-3  The strength characteristics of a rock is a criterion for its ability to be drilled and fractured. The uniaxial compressive strength (UCS) is the most commonly used strength index in construction industry and in rock engineering projects. Therefore, a comprehensive knowledge on the factors that could influence the value of the compressive strength is essential in any rock engineering project ...

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Effects of temperature on mechanical properties of granite ...

2020-3-1  Effects of thermal treatment on tensile strength of Laurentian granite using Brazilian test Rock Mech. Rock Eng , 48 ( 2015 ) , pp. 2213 - 2223 CrossRef View Record in Scopus Google Scholar

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Effects of Thermal Treatment on Tensile Strength of ...

2015-2-1  The effect of thermal treatment on several physical properties and the tensile strength of Laurentian granite (LG) are measured in this study. Brazilian disc LG specimens are treated at temperatures of up to 850 °C. The physical properties such as grain density, relative volume change per degree, and P-wave velocity are investigated under the effect of heat treatment. The results indicate ...

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Rock Mechanics

2015-10-23  • Strength classification is based on strength of the rock (compressive strength modulus of elasticity; Table 7.2) • 5 strength classes: A-E based on the overall rock strength; A = very strong, E = very weak (Table 7.3) • Any discontinuities, fractures, bedding planes, etc. will strongly influence overall strength of the rock.

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The Effect of Aggregate Size on The Strength of Concrete

2017-9-26  concrete compressive strength at 28 days for the granite aggregate is 30 MPa [4]. Aggregate shape and texture can help to improve the strength of concrete. Spherical shape suitable for use and easy to compact concrete and also give higher strength if compare to flat form or flake form, sharp, long, uneven or angular. If

Read More
Paper: Quantifying the Size Effect of Rock Mass Strength

Because the proportion and configuration of the discontinuities (relative to the proportion of intact rock) determine the strength of the composite material, there is a pronounced size effect, such that large volumes appear weaker than small volumes. It is therefore

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STRENGTH PROPERTIES OF ROCKS AND ROCK MASSES 1 ...

2006-3-19  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

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EFFECTS OF AGGREGATE TYPE, SIZE, AND CONTENT ON

2014-1-8  The effects of aggregate type, size, and content on the behavior of normal and high-strength concrete, and the relationships between compressive strength, flexural strength, and fracture energy are discussed. The concrete mixtures incorporate either basalt or crushed limestone, aggregate sizes of 12 mm ('h in.) or 19 mm (:Y. in.), and

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On the Tensile Strength of Granite at High Strain Rates ...

2016-6-14  The dynamic tensile behavior of granite samples, when some preexisting cracks are introduced artificially, is investigated. Spalling tests using a Hopkinson bar are performed and strain rates of ~10 2 1/s are obtained in both specimen types (with and without initial cracks). This experimental technique is employed being of the same order as strain rates in rock materials during percussive ...

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The Effect of Mineralogical Composition on Strength and ...

2019-7-3  The strength characteristics of a rock is a criterion for its ability to be drilled and fractured. The uniaxial compressive strength (UCS) is the most commonly used strength index in construction industry and in rock engineering projects. Therefore, a comprehensive knowledge on the factors that could influence the value of the compressive strength is essential in any rock engineering project ...

Read More
Effects of temperature on mechanical properties of granite ...

2020-3-1  Effects of thermal treatment on tensile strength of Laurentian granite using Brazilian test Rock Mech. Rock Eng , 48 ( 2015 ) , pp. 2213 - 2223 CrossRef View Record in Scopus Google Scholar

Read More
Rock Mechanics

2015-10-23  • Strength classification is based on strength of the rock (compressive strength modulus of elasticity; Table 7.2) • 5 strength classes: A-E based on the overall rock strength; A = very strong, E = very weak (Table 7.3) • Any discontinuities, fractures, bedding planes, etc. will strongly influence overall strength of the rock.

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Shear strength criteria for rock, rock joints, rockfill ...

2013-8-1  Shear strength of rock joints. Recent drafts of the ISRM suggested methods for testing rock joints, and widely circulated errors on the Internet and in commercial numerical modelling software, caused the writer to spend some time on the topic of shear strength of rock joints, in his 6th Müller Lecture (Barton, 2011).

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STRENGTH PROPERTIES OF ROCKS AND ROCK MASSES 1 ...

2006-3-19  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

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Influence of grain size heterogeneity on strength and ...

2017-2-7  Mohsen and Martin studied the heterogeneity effect on the crack initiation stress and the uniaxial compressive strength (UCS) of low-porosity crystalline rock using grain-based model in UDEC. They also found that the more homogeneous the numerical model was, the higher the crack initiation stress and UCS would be.

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Paper: Quantifying the Size Effect of Rock Mass Strength

Abstract: A long-standing problem in rock mechanics is the estimation of rock mass strength. The term “rock mass” denotes a large volume of fractured rock in which yield of intact material and discontinuities (joints) must both occur for overall failure to take place.

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Strength and Durability Properties of Granite Powder

2016-10-12  granite powder added by weight a range viz. 0, 25 and 50% as a replacement of sand (fine aggregates) used in concrete. Mixes incorporating 0% granite powder, or 25% granite powder, or 25% granite powder were designated as GP0, GP25 and GP50 respectively. Cement was replaced with Silica fume, fly ash, slag and superplasticiser for each concrete ...

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Rock Mechanics

2015-10-23  • Strength classification is based on strength of the rock (compressive strength modulus of elasticity; Table 7.2) • 5 strength classes: A-E based on the overall rock strength; A = very strong, E = very weak (Table 7.3) • Any discontinuities, fractures, bedding planes, etc. will strongly influence overall strength of the rock.

Read More
Effects of temperature on mechanical properties of granite ...

2020-3-1  Effects of thermal treatment on tensile strength of Laurentian granite using Brazilian test Rock Mech. Rock Eng , 48 ( 2015 ) , pp. 2213 - 2223 CrossRef View Record in Scopus Google Scholar

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Effect of Aggregate Maximum Size upon Compressive

2021-11-8  Variation of concrete strength with MAS for mix 1:3:6 Effect of mix proportions Figure (5) shows the compressive strength variation of the all mixes with different maximum aggregate sizes.

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The Effect of Aggregate Size on the Compressive Strength ...

An experiment was conducted to determine the effect of aggregate size on the compressive strength of concrete. The experiment had three treatments, which were the aggregate sizes (9.5 mm, 13.2 mm ...

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Rock Mechanics and Rock Engineering Home

2021-11-17  Rock Mechanics and Rock Engineering publishes original research on the experimental and theoretical aspects of rock mechanics, including laboratory and field testing, computational methods, design principles and site investigation. Coverage also includes case histories on design and construction of structures in rock and review papers.

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