Some Useful NumbersBasalt. 100-300 MPa. Quartzite. 150-300 MPa. Sandstone. 20-170 MPa. Shale. 5-100 MPa. Line. 30-250 MPa. Marble. 35-60 MPa. Slate. 100-200 MPa. Quartzite. 150-300 MPa. Concrete. 14-42 MPa. High strength concrete 70 MPa. Steel. 250 MPa. Wood. 5 MPa. Field test for compressive strength of soils and rocks.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.

Rock mass properties - RocscienceReliable estimates of the strength and deformation characteristics of rock masses are required for almost any form of analysis used for the design of slopes, foundations and underground excavations. Hoek and Brown (1980a, 1980b) proposed a method for obtaining estimates of the strength of jointed rock masses, based.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.

Brittle strength of basaltic rock masses with applications to Venus .

Strength and deformation properties of granite, basalt, line .

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 line,. 1. 52; and for the tuff, 1. 74. The compressional wave velocity of rock.

Some Useful Numbers

Basalt. 100-300 MPa. Quartzite. 150-300 MPa. Sandstone. 20-170 MPa. Shale. 5-100 MPa. Line. 30-250 MPa. Marble. 35-60 MPa. Slate. 100-200 MPa. Quartzite. 150-300 MPa. Concrete. 14-42 MPa. High strength concrete 70 MPa. Steel. 250 MPa. Wood. 5 MPa. Field test for compressive strength of soils and rocks.

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.

11 Rock mass properties - AGH

Chapter 11: Rock mass properties. Table 11.2: Field estimates of uniaxial compressive strength. Grade* Term. Uniaxial. Comp. Strength. (MPa). Point. Load. Index. (MPa). Field estimate of strength. Examples. R6. Extremely. Strong. > 250. >10. Specimen can only be chipped with a geological hammer. Fresh basalt, chert,.

Properties of Basalt | Physical | Thermal - Compare Rocks

Rocks are rated on the on the Moh's Hardness Scale which rates the rocks on the scale from 1 to 10. Rocks with hardness 1-3 are soft rocks from 3-6 are medium hardness rocks and 6-10 are hard rocks. The hardness of Basalt is 6 whereas its compressive strength is 37.40 N/mm2. Streak is the color of rock when it is.

Strength Properties of Rocks and Rock Masses - University of .

macrocracking takes place as the rock becomes more deteriorated and crack coalescence takes place. Various authors have compiled the values of the unconfined compressive strength for different rock types (Balmer, 1953; Johnson and DeGraff, 1988; Hatheway and Kiersch, 1989; Goodman,. 1989; etc..). Typical values.

New correlations between uniaxial compressive strength and point .

Dec 20, 2016 . Although the mechanical and physical properties of many rocks have extensively been studied, little work is reported on basalt rock. This paper discusses the interrelationships between the mechanical and the physical properties of the basalt rock. Laboratory tests were conducted on rock cores collected.

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.

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.

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. −. +. ≈.

A Study on Strength Characteristics of Fiber Reinforced . - IJETT

research on High Strength Concrete of grade M40 using Basalt Rock Fibre. The fibres were replaced at a percentage from 0 to 0.75% at an interval of 0.25%. The hardened properties of concrete such as compressive strength, split tensile strength and. Flexural Strength are test at 28 days. The. Compressive strength of.

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 line. The flexural strength of high-strength concrete containing line is limited by the strength of the rock and the matrix. The flexural strength of high-.

Unconfined compressive strength (UCS) test results with each rock.

from publication 'Estimating rock compressive strength from Rock Abrasion Tool (RAT) grinds' on ResearchGate, the professional network for scientists. . 4 is a shaded rectangular field indicating the measured SGE values of Adirondack-class basalts and interpreted UCS values from Thomson et al. (2013).

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.

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.

Cutting of rock

Well known are granite and basalt. 2. . In the first case the strength (tensile- and compressive strength), deformation properties (E-value) . 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 sample is.

Mechanical Properties of Intact Rock and Fractures in Welded Tuff .

Feb 1, 2012 . Joint roughness coefficient (JRC) and Joint Wall. Compressive Strength (JCS) were obtained through back-analysis of the shear tests. It was found that the. JCS of tested joints are larger than the intact rock ... The lithology of the core sample N2-4219 ranges from basaltic to andesitic in nature, consisting of.

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 & GEOLOGIC OCCURRENCE. The NX cores were obtained from exploration drill holes at Koyna damsite, Bombay.

Correlation of rock strength between uniaxial compressive, Brazilian .

Dec 23, 2016 . Correlation of rock strength between uniaxial compressive, Brazilian and point load tests: a laboratory study Honours Thesis, School of Mechanical and Mining . Basalt and Brisbane Tuff) were sampled, cored, and tested using UCS, BTS and PL machines in line with the International Society for Rock.

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.

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.