crushing strength of basalt rock

Brittle strength of basaltic rock masses with applications to Venus ...

Jun 25, 1993 ... At elevated temperature (∼450°C) and zero confining pressure, reference values for the strength of intact basalt are: Young's modulus, 57 GPa; Poisson's ratio, 0.25; unconfined compressive strength, 210 MPa; and fracture toughness, 2–2.8 MPa m½. Corresponding values for a basaltic rock mass that...

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Limits on strength and deformation properties of jointed basaltic rock ...

Corresponding values for a basaltic rock mass that incorporate the weakening effects of scale are deformation modulus, 10–40 GPa; Poisson's ratio, 0.3; tensile strength, −0.1 to −2.5 MPa; uniaxial compressive strength, 10–90 MPa; and cohesion, 0.6–6 MPa. A measured deformation modulus for ambient pressure in the...

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strength and deformation properties of granite, basalt, limestone and ...

tests indicated,that the rock within each rock type was quite uni- form. Results of the unconfined compressive strength tests on basalt indicated that as the loading rate was increased from 1 to 1.60 x 10 psi/sec, ultimate strength, total axial strain, and Young's modulus of elasticity increased. Total diametral strain decreased as...

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Comparative Rock Mass Strengths of Basalt and Tuff and Some ...

Strength parameters for Calico Hills tuff and basalt are very different, both from their intact equivalents and from each other. Fracturing of either rock type is associated with a marked reduction in the properties of the respective rock masses. For example, the bulk tensile and compressive strengths are reduced by one order of...

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Strength and deformation properties of granite, basalt, limestone ...

tests indicated that the rock within each rock type was quite uni- form. Results of the unconfined compressive strength tests on basalt indicated that as the loading rate was increased from 1 to 1.60 x 107 psi/sec, ultimate strength, total axial strain, and Young's modulus of elasticity increased. Total diametral strain decreased...

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Crushing strength

In general the compressive load from a dam on to its foundations will not exceed 10 MPa. The strength of a rock will depend upon its -. Quality; The ... Rock type, Strength (MPa). Siltstone, 24-120. Greywacke, 20-30. Shale, 35-110. Sandstone, 40-200. Limestone, 50-240. Dolomite, 50-150. Granite, 90-230. Basalt, 200-350.

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Estimating uniaxial compressive strength of rocks using genetic ...

The aim of this paper is to estimate the uniaxial compressive strength (UCS) of rocks with different characteristics by using genetic expression programming (GEP). For this purpose, five different types of rocks including basalt and ignimbrite (black, yellow, gray, brown) were prepared. Values of unit weight, water absorption...

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Some Useful Numbers

26-35°. Because the angle of internal friction, ϕ, is typically around 25-35°, the coefficient of internal friction (tanϕ) is 0.5 to 0.7. Cohesive strength (τ0). Rock. 10,000 kPa .... 26.46 MPa/km (for ρ = 2.70). Hydrostatic pressure gradient. 9.8 MPa/km. Unconfined compressive strength. Granite. 100-250 MPa. Basalt. 100-300 MPa.

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compressive strength of basalt

Elastic buckling of fractured basalt on the Columbia Plateau ... using a rock-mass strength criterion and a deformation modulus on simple elastic models for buckling of .... fined compressive strength of intact basalt, m and s. Strength of Concrete Containing Basalt Fibre - IJERA. This paper presents the comparative study of...

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Basaltic Crushed Rock Stabilized with Cementitious Additives ...

Research was undertaken to increase knowledge of the properties of local stabilized pavement materials to facilitate their wider use in road construction and rehabilitation. Laboratory tests involved testing for the unconfined compressive strength (UCS), shrinkage, and capillary behavior of crushed basaltic rocks stabilized...

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Compressive strength of rocks - - PetroWiki

Jun 4, 2015 ... Mechanical failure in rocks generally means either fracturing or permanent deformation as a result of compression. While many methods for calculating failure relationships exist, an initial measure of the compressive strength of reservoir rocks is still needed for use in those calculations.

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The Use of Basalt Aggregates in Concrete Mixes ... - Semantic Scholar

The laboratory investigation included measurements of compressive strength, indirect tensile ... Basalt is a hard, dense volcanic igneous rock that can ... In crushed form, basalt also finds use as aggregate in concrete. Crushed basalt aggregates are dense fine-grained rocks that are of very dark color- green or black and are...

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Mechanical properties of Finnish rocks based on uniaxial ... - Aaltodoc

May 25, 2015 ... Title of thesis Mechanical properties of Finnish rocks based on uniaxial compressive strength and tensile ... Keywords: Uniaxial compressive strength test, Brazil tensile strength test, Finnish rocks, statisti- cal analysis ..... By their origin, all rock can be separated into three groups: igneous, sedimentary.

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Effects of Porosity on Mechanical Characteristics of Vesicular Basalts

KEY WORDS: Basalts; effective porosity; bulk specific gravity; uniaxial compressive strength; Mohr-Coulomb failure criterion; cohesion; internal friction angle; ultrasonic velocity. INTRODUCTION. Basalt is one of the most common rock types of volcanic lava area, and has a fine-grained mineral texture. In addition, basalt has...

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Correlations of Uniaxial Compressive Strength of Rock Mass with ...

There has been a lot of interest in the relationship between uniaxial compressive strength (UCS) and other properties of rock. Evaluation of rock parameters such as cohesion, Young's modulus, angle of friction, and Poisson's ratio is required for numerical modeling of rock. Finding empirical relations between these...

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This content

Table 10.2 gives the approximate values of uniaxial compressive strength for cohesive soils and rocks. Surface roughness i can be measured as shown in Figure 10.6. Table 10.1 Approximate values for the basic friction angle for different rocks. Rock. Degrees. 32. 31-38. 35. Amphibolite. Basalt. Conglomerate. Chalk.

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Report No. REC-ERC-74-10, Rock Mechanics Properties of Typical ...

elastic modulus; compressive strength; tensile strength; and shear strength, including cohesion and coefficient of angle of internal friction ..... Tuff breccia overlies a vesicular basalt, which is underlain by massive basalt. PETROGRAPHIC. DESCRIPTION. The rock is hard, dull gray to pink, compact, but porous and vesic- ular.

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Mining Rock Mass Rating - Edumine

A. Classification Parameters and Their Ratings. Parameter, Range of Values. A1. Strength of Intact Rock Material ( see Field Estimates ). Point-Load Strength Index, > 10 MPa, 4 - 10 MPa, 2 - 4 MPa, 1 - 2 MPa, For this low range - uniaxial compressive test is preferred. Uniaxial Compressive Strength, > 250 MPa, 100 - 250...

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Technical Note The Influence of Porosity on Tensile and ...

Rock Mech. Rock Engng. (2004) 37 (4), 331–341. DOI 10.1007/s00603-003-0020-1. Technical Note. The Influence of Porosity on Tensile and Compressive. Strength of Porous Chalks. By. V. Palchik and Y. H. Hatzor. Department of Geological and Environmental Sciences, Ben–Gurion University of the Negev, Beer-Sheva,...

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Effects of Basalt Fibers on Mechanical Properties of Concrete

Basalt Fiber Reinforced Polymers (BFRP) on some fundamental mechanical properties of concrete. Basalt fibers formed by heating crushed basalt rocks and funnelling the molten basalt through a spinneret to form ... to measure the modulus of rupture, in addition to 30 concrete prisms for average residual strength test.

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A Comparative Study of Concrete Strength Using Metamorphic ...

Mar 16, 2017 ... A Comparative Study of Concrete Strength Using Metamorphic, Igneous, and Sedimentary Rocks (Crushed Gneiss, Crushed Basalt, Alluvial Sand) as. Fine Aggregate. Mambou Ngueyep Luc Leroy1,2*, Tchapga Gniamsi Guy Molay1, Ndop Joseph1,3, Fofe Meli Colince2 and Ndjaka Jean-Marie Bienvenu1.

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Models for estimating uniaxial compressive strength and elastic ...

E = 0,0987 SRH 1,5545 travertine, limestone, dolomitic limestone and schist. Yagiz, 2009. [23]. UCS - uniaxial compressive strength [MPa]; E- elastic modulus [GPa];. SRH - Schmidth hardness. Equation. Type of rock. Authors. UCS = 9,95 vP. 1,21 dolomite, sandstone, marl, limestone, diabase, serpentinite. Kahraman, 2001.

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The effects of weathering on the strength and ... - Boston University

Basalt physical properties such as compressive strength and density are directly linked to their chemistry and constitution; as weathering progresses, basalts gradually become weaker and transition from intact rock to saprolite and ultimately, to soil. Here we quantify the degree of weathering experienced by the.

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Ocean Drilling Program Scientific Results Volume 148

between rock strength and electrical properties such as formation factor are tenuous, in part because of the fairly narrow range ..... All basalt data. 2.75. 2.8. 2.85. 2.9. Bulk density, g/cm3. 2.95. Figure 3. Relationship between bulk density and unconfined compressive strength (Co) for the diabase samples from Hole 504B.

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Predicting the compressive and tensile strength of rocks ... - SAIMM

Predicting the compressive and tensile strength of rocks from indentation hardness index. Equation [1] was obtained from the IHI testing performed on ultramafic and basaltic rocks. In this study, the relation between IHI and both UCS and BTS was investigated for igneous, metamorphic, and sedimentary rocks. The main...

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EFFECTS OF AGGREGATE TYPE, SIZE, AND CONTENT ON ...

Flexure test results show that high-strength concrete containing basalt yields higher flexural strengths than concrete with similar compressive strength containing limestone. The flexural strength of high-strength concrete containing limestone is limited by the strength of the rock and the matrix. The flexural strength of high-.

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Chapter 4 Engineering Classification of Rock Materials - USDA

Appendix E Line Survey Data Sheet. 4E–1. Appendix F Discontinuity Survey Data Sheets. 4F–1. Tables. Table 4–1. Rock type classification. 4–3. Table 4–2. Texture descriptors for igneous and crystalline. 4–4 metamorphic rocks. Table 4–3. Hardness and unconfined compressive strength of rock. 4–5 materials. Table 4–4.

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Predicting the unconfined compressive strength of the ... - Inside Mines

Compressive strength is the most widely used design parameter in the construction industry and in rock engineering. For example ... reported that mining engineers request the uniaxial compressive strength (UCS) more often than any other rock property. However .... limestone, dolomite and marble), and granitic rocks.

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Cutting of rock

Igneous rock; a rock that has solidified from molten rock material (magma), which was generated within the Earth. Well known are granite and basalt ... Unconfined compressive strength. The most important test for rock in the field of dredging is the unaxial unconfined compressive strength (UCS). In the test a cylindrical rock...

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Bearing Capacity of Rocks - IITK

Bearing Capacity of Rocks. Intact Rock Mass. A rock mass with joint spacing greater than 4 to 5 times the width of the footing. Local and. General shear failure is associated to brittle. General shear failure is associated to brittle and ductile rock respectively.

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Basalt fiber - Wikipedia

The manufacture of basalt fiber requires the melting of the crushed and washed basalt rock at about 1,500 °C (2,730 °F). The molten rock is then extruded through small nozzles to produce continuous filaments of basalt fiber. The basalt fibers typically have a filament diameter of between 10 and 20 µm which is far enough...

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Earth Materials - UCL

Constitutive equation for soils. Soils are fractal materials. There is a lognormal distribution of grain sizes (c.f. crack lengths in rocks). Suppose we subject a soil to a simple shear strain. The shear forces applied to each grain must be lognormally distributed since they are proportional to the grain surfaces. So the shear...

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Geomechanical rock properties of a basaltic volcano - Frontiers

Jun 9, 2015 ... To do this, we evaluated the physical (porosity, permeability) and mechanical (strength) properties of basaltic rocks at Pacaya Volcano (Guatemala) through a variety of laboratory experiments, including: room temperature, high temperature. (935◦C), and cyclically-loaded uniaxial compressive strength tests...

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Strength Aspects of Basalt Fiber Reinforced Concrete - ijirae

used solution for improving tensile and flexural strength of concrete. Various types of ... Keywords— Basalt fiber, Compressive strength, Flexural strength, Split tensile strength, Fiber reinforced concrete ... Basalt rock is a volcanic rock and can be divided into small particles then formed into continues or chopped fibers. Basalt...

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Relationship between Unconfined Compressive Strength and ...

saturation for quartz-rich sandstones. Broch (1974) reported unconfined compressive strength reductions of 33 percent to 53 percent for coarse-grained igneous and metamorphic rocks of low porosity (0.3 percent to 1.2 percent). Broch (1974) also found that rocks of lower porosity showed a greater loss than rocks of.

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Mechanical Properties of Intact Rock and Fractures in Welded Tuff ...

Feb 1, 2012 ... Compressive Strength (JCS) were obtained through back-analysis of the shear tests. It was found that the ... Rock mechanical properties and failure criterion are mainly obtained from laboratory triaxial testing. The .... from basaltic to andesitic in nature, consisting of plagioclase and quartz. The majority of the...

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Uniaxial compressive strength

Determination of the Uniaxial compressive strength of cylindrical intact rock specimens (load up 2000kN). The load rate is kept constant using a ... estimate of strength, Examples. R6, Extremely strong, >250, >10, Specimen can only be chipped with a geological hammer, Fresh basalt, chert, diabase, gneiss, granite, quartzite.

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Trinity's Trap Rock Exterior

time when weaker soil and stone eroded leaving strong trap rock pillars looking like temple columns facing a natural ... Connecticut Trap rock is often mistaken for basalt, but technically, the stone is intrusive igneous ... Meriden is indeed strong: a test of it showed a “first crack” crushing strength of 34,920 pounds per square...

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Basalt: An Ancient Material for Innovative and Modern Applications

Basalt is a dark-colored, fine-grained, very hard igneous rock composed mainly of plagioclase, pyroxene ... It most commonly forms as an extrusive rock, such as a lava flow, but can also form in small intrusive bodies, such as an igneous dike or a thin sill. Basalt ... compressive strength and chemical resistance. Basalt can...

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chapter five classification of shear strength of joints in rock

Moderatelv hard rock. 1~ ____ H~ardrock. Very hard rock. Unconfined compressive stren\rth (UCS). 1-25 MPa. 25 - 50 MPa. 50-100 MPa. 100-200 MPa. > 200 MPa. Rock type. Mudstone, Sandstone. Basalt. Dolerite, Granite. Table 5.1. Classification of intact rock strength (Deere and Miller, 1966). PhD-Chapter05-2003.doc.

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