compressive strength of basalt rock

  • Strength Properties of Rocks and Rock Masses University of

    between strain hardening and softening is called the unconfined compressive strength of the rock and is denoted as Co or qu. Failure takes place continuously from C to D during which macrocracking takes place as the rock becomes more deteriorated and crack coalescence takes place. Various authors have compiled the 

    Chat Online
  • 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.

    Chat Online
  • 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 

    Chat Online
  • Strength and deformation properties of granite, basalt, limestone

    The difference in the unconfined compressive strength between the slow and the rapid rates of loading for the rocks tested varied considerably. The dynamic compressive strength factor for the granite was less than l for the basalt, 1.35 for the limestone,. 1. 52 and for the tuff, 1. 74. The compressional wave velocity of.

    Chat Online
  • Rock mass properties Rocscience

    1. (1) where. ' 1 σ and '. 3 σ are the maximum and minimum effective principal stresses at failure, b m is the value of the HoekBrown constant m for the rock mass, s and a are constants which depend upon the rock mass characteristics, and ci σ is the uniaxial compressive strength of the intact rock pieces.

    Chat Online
  • 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 

    Chat Online
  • Brittle strength of basaltic rock masses with appliions to Venus

    Jun 25, 1993 unconfined compressive strength, 210 MPa and fracture toughness, 22.8 MPa mm. Corresponding values for a basaltic rock mass that incorporate the weakening effects of scale (but not elevated temperature) are: Deformation modulus, 550 GPa Poisson's ratio, 0.3 tensile strength,0.2 to 2 MPa 

    Chat Online
  • Mining Rock Mass Rating Edumine

    A. Classifiion Parameters and Their Ratings. Parameter, Range of Values. A1. Strength of Intact Rock Material ( see Field Estimates ). PointLoad 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 

    Chat Online
  • Correlations Between Index Properties and Unconfined

    completely weathered basalt. Correlations between the physical and mechanical properties of the weathered basalt were also determined. The permeability of the rock material increases as the porosity increases with the increasing of the weathering grade. The uniaxial compressive strength decreased to almost zero as the 

    Chat Online
  • 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 

    Chat Online
  • 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 

    Chat Online
  • Bearing Capacity of Rocks IITK

    Allowable Bearing Stresses on Rock. Masses. Foundations on Fractured Rock Formation. 30. M. Pa). Note: Use maximum qa < q u where qu = compressive strength. 20. 25 ress q a. (M where qu compressive strength of intact rock specimens. 15 e aring Str. )130/. (1. )16/. (. 1). (. RQD. RQD. MPa q. ALLOWABLE. −. +. ≈.

    Chat Online
  • New correlations between uniaxial compressive strength and point

    and the physical properties of the basalt rock. Laboratory tests were conducted on rock cores collected from over 22 loions within the Mumbai city limits. The samples were tested in accordance with ISRM (1985) specifiions. Correlations between the uniaxial compressive strength. (UCS) and the point load strength 

    Chat Online
  • 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 

    Chat Online
  • Predicting the compressive and tensile strength of rocks from

    where UCSis the uniaxial compressive strength (MPa) and IHIis the indentation hardness index (kN/mm). 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 

    Chat Online
  • Effects of Rock Classes and Porosity on (PDF Download Available)

    Dec 19, 2017 Effects of rock classes and porosity on the relation between uniaxial compressive strength and some rock properties for carbonate rocks are discussed. Researchers applied variance account for (VAF) and rootmeansquare error (RMSE) approaches in addition to the correlation coefficient to check the 

    Chat Online
  • Some Useful Numbers

    Basalt. 100300 MPa. Quartzite. 150300 MPa. Sandstone. 20170 MPa. Shale. 5100 MPa. Limestone. 30250 MPa. Marble. 3560 MPa. Slate. 100200 MPa. Quartzite. 150300 MPa. Concrete. 1442 MPa. High strength concrete 70 MPa. Steel. 250 MPa. Wood. 5 MPa. Field test for compressive strength of soils and rocks.

    Chat Online
  • Report No. RECERC7410, Rock Mechanics Properties of Typical

    labradorite crystals range from 0.03 to 0.07 mm, and the augite ranges from 0.04 to 0.11 mm in length. The rock is a glassy basalt. ENGINEERING. PROPERTIES. OF ROCK CORE SAMPLES. SPECIFIC. GRAVITY. ABSORPTION,%. No. avg. 2.62 range. 0.16 avg. 1.4 ran ge spec. 0.7. (10). COMPRESSIVE. STRENGTH, PSI.

    Chat Online
  • tensile and compressive strength of granite and basalt arhc.biz

    Basalt Compressive Strength modernelectricals.co.in. Strength and deformation properties of granite, basalt, limestone, Gneiss Mean tensile strength and compressive strength for selected sedimentary rock . Get. Get More Info. image 

    Chat Online
  • Strength characteristics of basalt rock in ultrahigh vacuum

    fracture mode, and strain energy capacity of basalt rock, small cylindrical specimens of the rock were Ultimate strength and strain energy capacity were increased significantly by the bakeout process, and both properties were also increased when testing took place in the .. the compressive strength tests while the speci.

    Chat Online