SBM
Rock mass properties Rocscience
deformation modulus of rock masses was made by Hoek and Diederichs 2006 This chapter presents the most recent Basalt Basalt andesite lava Gabbro Marble Granite Norite Quartz diorite Figure 4 Influence of specimen size on the strength of intact rock After Hoek and Brown 1980a It is suggested that the nbsp
Material Properties
Poisson 39 s Ratio υ e║ e┴ ║ means parallel to shortening direction υ 0 5 incompressible material no volume loss Rocks υ 0 25 to 0 33 examples Page 3 3 Stress Strain in 3D We need to consider the contribution of the perpendicular stresses exx 1 E σxx υ σyy σzz Strain along x Young 39 s modulus
Prediction of Young 39 s Modulus of Intact Rock Using Bayesian
7 Jul 2014 Many models have been proposed to estimate the Young 39 s modulus E of intact rock based on its uniaxial compressive strength UCS 39 s model i e E We develop three rock specific 39 models i e for basalt limestone and chalk that account for the different sources of uncertainty We also provide nbsp
Basalt Fiber Properties Advantages and Disadvantages
Properties of basalt fiber used in structural composite reinforcing 1 Basalt rock characteristics vary from the source of lava cooling rate and historical exposure to the elements High quality Fiber Type ▸ Specific Gravity ▸ Tensile Strength ksi MPa ▸ Elastic Modulus ksi GPa ▸ Strain at Break in in mm mm ▸ nbsp
Basalt fiber Wikipedia
Basalt fiber is a material made from extremely fine fibers of basalt which is composed of the minerals plagioclase pyroxene and olivine It is similar to fiberglass having better physicomechanical properties than fiberglass but being significantly cheaper than carbon fiber It is used as a fireproof textile in the aerospace and nbsp
Models for estimating uniaxial compressive strength and elastic
estimation uniaxial compressive strength Young 39 s modulus intact rock material rock 100 200 4 10 Specimen requires many blows of geological hammer to fracture it amphibiolite sandstone basalt gabbro gneiss granodiorite limestone UCS unconfined compressive strength MPa E elastic modulus GPa
The evolution of elastic moduli with increasing crack EOST
10 Oct 2008 Previous studies of Mt Etna volcano have assumed fixed values of Young 39 s modulus ranging from 50 to 100 GPa and a Poisson 39 s ratio of 0 25 Cayol and Cornet 1998 Bonaccorso and Davis 1999 Basaltic rocks from Mt Etna volcano have been the subject of a number of mechanical studies in recent nbsp
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 BASALT ROCK DATA SUMMARY Vesicular p 6327 LOCA TION amp GEOLOGIC OCCURRENCE The NX cores were obtained from exploration drill holes at Koyna damsite Bombay nbsp
Progress in Physical Geography PCTE
Young 39 s Modulus of Elasticity Basalt Turkey 61 8–66 0 Kahraman et al 2002 North Ridge basalt Lord Howe Island 44 2–48 3 Dickson et al 2004 Vestfiro˘ir Peninsula basalt Iceland uniaxial compressive strength MPa E Young 39 s modulus MPa N Schmidt Hammer rebound number rock density g cm3
Some Useful Numbers
A value of 0 60 would be a good number for general use Glass on glass 0 4 Rubber on concrete 0 75 Steel on steel 0 55 Angle of internal friction ϕ Rock Young 39 s Modulus E Clay soil 10 200 MPa soft to stiff Sandy soil 10 50 MPa loose to compact Gravel soil 70 170 MPa loose to compact Soft clay 1 3 MPa
Characterizing the Strength of Different Deccan Traps by IJMETMR
paper describes an attempt made for different rock types encountered in the various river valley project sites situated in the Deccan trap basaltic region of Maharashtra state India Mechanical rock properties like p wave velocity density young 39 s modulus and uniaxial compressive strength are determined in the laboratory nbsp
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 39 s modulus of elasticity increased Total diametral strain decreased as nbsp
GY403 Structural Geology
perpendicular to an imaginary plane passing through a rock mass It is considered positive if it would cause shortening of material along axis of stress tensor If normal stress is negative it would potentially cause a stretching along this direction The symbol σ is used to represent normal stress
physical mechanical and deformational properties of metabasalts
Institute of Rock structure and Mechanics AS CR Prague Czech Republic initiated The results of tests are in some cases affected by the small amount of rock material that we had at our disposal Table 5 Young s modulus and modulus of deformation of metabasalts amphibolites and gneisses from KSDB 3 compared nbsp
Ultrasonic Velocities and Related Elastic Properties ScholarSpace
Ultrasonic Velocities and Related Elastic Properties of Hawaiian Basaltic Rocks 39 MURLIH MANGHNANI and GEORGE P WOOLLARD LABORATORY MEASUREMENTS of the compres sional wave and shear wave velocities of various rock types give a useful basis for understanding the geological significance of nbsp
Frontiers Geomechanical rock properties of a basaltic volcano
Other rocks can debilitate upon thermal stressing as is the case during decarbonation Heap et al 2013b and dehydroxylization Heap et al 2012 of certain rock forming minerals Cyclic loading can lead to mechanical weakening Kendrick et al 2013a and an increase in heterogeneity of elastic modulus values likely nbsp
rock Definition Characteristics amp Types Britannica com
30 Nov 2017 elastic constants at room temperature and pressure material Young 39 s modulus in 10 6 bars shear modulus in 10 6 bars ice 0 1 0 03 shale 0 2–0 3 0 15 limestone 0 4–0 7 0 22–0 26 granite 0 3–0 6 0 2 basalt 0 7–0 9 0 3 steel 2 1 0 83 material temperature degrees Celsius coefficient of nbsp
Appendix B Volcanic Rock Classifications and Data UC Press E
Rock Type Density Mg m3 Young 39 s Modulus E Shear Modulus G Poisson 39 s Ratio v Obsidian 2 446 0 656 0 303 0 08 0 652 0 278 0 17 0 718 0 303 0 18 Silicic Tuff Lithic 1 45 0 14 0 11 Bedded 1 6 0 042 0 021 Welded 2 2 0 116 0 054 0 12 Andesite 2 57 0 54 0 18 Basalt 2 85 0 61 0 27
Brittle strength of basaltic rock masses with applications to Venus
25 Jun 1993 At elevated temperature ∼450°C and zero confining pressure reference values for the strength of intact basalt are Young 39 s modulus 57 GPa Poisson 39 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 nbsp
Effect of Weathering on Strength and Modulus of Basalt and
ABSTRACT Engineering properties such as Unconfined Compressive Strength UCS q u and Young 39 s Modulus E of mass rock have a significant effect on project design and construction operation of the rock structure interface A better understanding
Elastic and mechanical properties of Etna basalt Copernicus
1 Mineral Ice and Rock Physics Laboratories Department of Earth Sciences University College London We report laboratory measurements of the elastic and mechanical properties basalts of an extruded lava flow basalt The static Young 39 s modulus was found to be around 25 GPa and the UCS to average 155 MPa
Foundations Modulus of Elasticity
Rock Type Modulus of Elasticity MPa x 1000 Limestone 3 27 Dolomite 7 15 Limestone very hard Schist Granitic 10 Schist Quartz 14 Granite very altered 2 Granite slightly altered 10 20 Granite good 20 50 Quartzite Micaceous 28 Quartzite sound 50 80 Dolerite 70 100 Basalt 50 Andesite 20 50
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 39 s modulus of elasticity increased Total diametral strain decreased nbsp
GEC 5 Soil and Rock Properties Federal Highway Administration
Soil properties rock properties laboratory testing in situ testing subsurface investigation data quality data interpretation shear strength consolidation hydraulic conductivity modulus 18 Distribution Statement No restrictions This document is available to the public from the National Technical Information Service nbsp
11 Rock mass properties AGH
The Mohr envelope relating normal and shear stresses can be determined by the Granite Basalt Basalt andesite lava Gabbro Marble Granite Norite Quartz diorite Figure 11 3 Influence of specimen size on the strength of intact rock After Hoek and Brown 1980a deformation modulus values which are too high
Some physical properties of dolerite Mineral Resources Tasmania
by D J Sloane Abstract Dolerite an igneous rock is exposed over half of The source of this information is not known but the information may be useful as a general guide Density Poissons ratio Youngs modulus Bulk modulus Rigidity modulus Information source Relative Performance of Basalt and Dolerite Flush nbsp
Limits on strength and deformation properties of jointed basaltic rock
Although basalts vary widely in composition and other physical factors many of the properties of a basaltic rock mass appear to vary within a factor of about 10 Typical values of strength parameters for intact basalt at ambient temperature 20°C and negligible confining pressure are Young 39 s modulus 78±19 GPa Poisson 39 s nbsp
Chapter 2 Principles of Drilling and Excavation Boston University
molten state of which basalt is the prime example Such rocks can be glassy if modulus G and Poisson 39 s ratio ν are used to describe elastic deformation of rock under loading For isotropic Modulus for different rocks According to Voigt 1910 the Young 39 s modulus of a composite rock can be approximated by 1
Brittle Strength of Basaltic Rock Masses with Applications to Venus
At elevated temperature ∼450°C and zero confining pressure reference values for the strength of intact basalt are Young 39 s modulus 57 GPa Poisson 39 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 incorporate the nbsp
the deformation modulus of rock masses rockmass net
Deformability is characterized by a modulus describing the relationship between the applied load and the resulting strain The fact that jointed rock masses do not behave elastically has prompted the usage of the term modulus of deformation rather than modulus of elasticity or Young 39 s modulus The commission of
Using the Schmidt Hammer on Rock Mass Characteristic in
Correlating uniaxial compressive strength with Schmidt hard ness point load index Young 39 s Modulus and mineralogy of gabbros and basalts northern Greece Bulletin of the International Association of Engineering Geology 54 3 11 1996 2 Aufmuth R E A systematic determination of engineering criteria for rocks
Ocean Drilling Program Scientific Results Volume 148
Because core recovery is quite low in oceanic basalts it is impor tant to establish correlations between rock strength and log derived physical properties such as density velocity porosity and electrical resistivity The strongest correlation in the samples we measure here is between the static Young 39 s modulus and the nbsp
WHAT ARE THE VALUES OF MODULUS OF ELASTICITY
13 Feb 2015 Types of Rocks Name of Rocks Youngs Modulus of Elasticity E kg cm2 105 Igneous Rocks Basalt 2 0 – 10 0 Diabase 3 0 – 9 0 Gabbro 6 0 – 11 0 Granite 2 6 – 7 0 Syemite 6 0 – 8 0 Sedimentary Rocks Dolomite 2 0 – 4 4 Limestone 1 0 – 8 0 Sandstone 0 5 – 8 6 Shale 0 8 – 3 0 Metamorphic nbsp
10 Seismic Velocities Densities and Elastic Constants of Volcanic
100 mesh screens placed between the rock cores and copper jackets Because of the constant λ Young 39 s modulus E seismic parameter lt gt and com Compressional P and shear S wave velocities Sample intervals in cm 447A 14 1 74 76 flow basalt 447A 25 2 24 26 flow basalt 447A 26A 30 33
Comparative Rock Mass Strengths of Basalt and Tuff and Some
II those deposits are pyroclastic they probably contain material having higher Young 39 s modulus and frictional properties 1218 STRENGTH OF BASALT AND Tun ROCK MASSES Schultz R A Fig 1 Mohr diagram showing commonly used representations of intact and fractured rock strengths The intact envelope nbsp
The Elastic Properties Determination of Volcanic Rocks by NDT net
Ultrasonic elastic properties of rocks have been compared with compressive strength data Evaluated ultrasonic velocities both transverse and longitudinal have Rhyolitic andesitic trachyandesitic and basaltic volcanic rock products are The calculated Young 39 s modulus densities ultrasonic velocity and compressive
Influence of water content on Geotechnical Properties of Deccan
mass All these mishaps call for a rigorous and intensive study of various geotechnical properties of Deccan basalts with varying moisture content The basalt rock Sr No Parameter UCS MPa Tensile Strength MPa Point load Index MPa Cohesion MPa Internal Angle of Friction φ ° Young Modulus MPa 1
Strength and deformation properties of volcanic rocks in Iceland
Keywords Volcanic rocks Iceland UCS test Brazilian test elasticity modulus 1 INTRODUCTION young and all bedrock was formed within the past 25 mapping of basalt Structural and mechanical properties Scoria content Common thichness of lava unit m Common UCS strength2 MPa Tholeiite basalt Tholeiite nbsp
An Engineering Assessment of the Strength and Deformation
The use of standard relationships between point load index Is 50 Uniaxial Compressive Strength UCS and elastic modulus The determination of the modulus of elasticity Young 39 s modulus for rock is an important part of many analyses This Conglomerate and basalt rock was also tested but not enough data was
Mechanical Properties of Intact Rock and Fractures in Welded Tuff
1 Feb 2012 to determine Young‟s modulus Poisson‟s ratio and failure envelop In addition multistage triaxial of the shear tests It was found that the JCS of tested joints are larger than the intact rock Uniaxial The lithology of the core sample N2 4219 ranges from basaltic to andesitic in nature consisting of