The determination of the modulus of elasticity is achieved through: a) the uniaxial compressive strength (σci), b) the uniaxial compressive strength (σci) and the longitudinal wave velocity (VP). The ratio of the modulus of elasticity and uniaxial strength (MR) has been determined for a number of rock types and compared with that proposed by ...
measurement of the mechanical properties of rock materials. The scratching test has already shown its suitability in that field [1, 2, 3] and the paper proposes to extend it for on-site determination, from a small piece of mortar, of the uniaxial compressive strength - UCS. First, the method is presented.
The determination of uniaxial compressive strength from point load strength for pyroclastic rocks. ... S.B. CelikEstimation of uniaxial compressive strength from point load strength, ... A. BasuEstimation of uniaxial compressive strength of rock materials by index tests using regression analysis and fuzzy inference system.
Figure 8-2: Uniaxial Compression Test on Rock with (a) Definitions of stress conditions and strains, (b) Derived stress-strain curve with peak stress corresponding to the uniaxial compressive strength (qu = F u) Commentary The uniaxial compression test is most direct means of determining rock strength…
The term soft rock is often referred to rock materials with a uniaxial compressive strength (UCS) lower than that of hard rocks and higher than that of soils. A rock material can be classified as a soft rock if it has a uniaxial compressive strength below 20 MPa, determined directly by uniaxial compression …
towards any other strength parameter. (Bishop, 1966). In the case of concrete, the compressive strength is the most commonly measured strength parameter and this is also true of rock specimens. For the uniaxial or unconfined compressive strength test a right circular cylinder of the
Estimating compressive strength. General rock failure criterion can be reduced to a few parameters dependent on lithology (m) and the uniaxial compressive strength (C 0). Lithology is commonly derived during log analysis, so m may be estimated (Table 1). What is needed still is an initial measure of rock strength provided by C 0.
Uniaxial compressive strength is also used in rock mass rating (RMR), Q- System, and in the determination of shear strength parameters of rock (e.g. Bieniawski, 1975; Sivakugan et al., 2014 ...
This and many other reports on unixial compression tests, conducted at SP, are published on SKB. Examples of standards. ISRM 1979, Suggested methods for determining the uniaxial compressive strength and deformability of rock materials. Int J Rock Mech Min Sci Geomech Abs 16(2), sid 135-140.
1. Scope. 1.1 This test method covers the determination of the strength of intact rock core specimens in uniaxial compression and confined compression.
ingtheuniaxial compressive strength of rock for practical engineering purposes. Table IVlists the corres-ponding strength ranges for the strength classification of rock ma-terials8. ESTIMATION OF THE TRIAXIAL STRENGTH While determination ofthe uni-axial compressive strength ofrockis a simple matter, this is not true for the collection of the ...
USING THE POINT LOAD TEST TO DETERMINE THE UNIAXIAL COMPRESSIVE STRENGTH OF COAL ... intact rock strength and not necessarily the strength of the rock mass. THE UNIAXIAL COMPRESSIVE STRENGTH TEST ... The point load test allows the determination of the uncorrected point load strength index (Is). It must be corrected
A visual determination method for uniaxial compressive strength estimation based on Croatian carbonate rock materials ... and sedimentological determinations were performed prior to laboratory testing to establish effects of particular determination parameters on rock material UCS. ... part 1. Suggested method for determination of the uniaxial ...
Compressive Strength (UCS). It is one of the most basic parameters of rock strength, and most common determination performed for boreability predictions. The unconfined (or uniaxial) compressive strength (UCS) of a rock is a common measure of the strength of intact rock. It is normally measured on cylinders of rock core by
Configuration for uniaxial and triaxial tests on rock cores, ADVANTEST and SERCOMP units Digital rock strength index apparatus (Franklin press) Schmidt hammer with rock cradle Rock mechanics is an important field of geotechnical engineering as it is the theoretical and applied science concerning the physical behavior of rocks and rock masses.
This test method specifies the apparatus, instrumentation, and procedures for determining unconfined compressive strength of intact rock core specimens. This procedure is identical to ASTM D 2938 except that the cores are tested after cutting without grinding, …
applied, and the rocks were classified according to Folk's (1962) classification [13]. 2.2. Test Procedures Uniaxial compressive strength test Uniaxial compression tests were performed on cubic samples, which had dimensions of 70 mm. The samples, until constant mass, 70 ± 5 °C were kept in the stove and
Uniaxial compressive rock strength determination Rebound hardness is perhaps the most frequently method used in rock testing to determine uniax-ial compressive strength (UCS). Proceq's RockSchmidt provides not only the possibility of obtain-ing the UCS, but also of sending the complete register data and report direct to the computer.
uniaxial compressive strength from the results of the point load test. 4. Test Results and Discussion 4.1 Uniaxial Compressive Strength Test Results The mean values of uniaxial compressive strength of the tested rocks are listed in Table 2. The strength values range from a low of 9.16 MPa for Marl to a high of 101.08 MPa for
load strength index and the uniaxial compressive strength for rocks in Korea is suggested in the form of table by using the results of the extensive literature reviews and laboratory tests. The suggested result is expected to be used for the simple and quick estimation of uniaxial compressive strength of rocks in Korea. Keywords: Uniaxial ...
IS 9143: Method for the determination of unconfined compressive strength of rock materials Item Preview remove-circle ... IS 9143: Method for the determination of unconfined compressive strength of rock materials. by Bureau of Indian Standards. Publication date 1979. Usage CC0 1.0 Universal.
HOEK & BROWN - PRACTICAL ESTIMATES OF ROCK MASS STRENGTH 2 1. the uniaxial compressive strength s ci of the intact rock pieces in the rock mass, 2. the value of the Hoek-Brown constant m i for these intact rock pieces, and 3. the value of the Geological Strength Index GSI for the rock mass. THE EFFECT OF WATER Many rocks show a significant ...
the Uniaxial Compressive Strength and Deformability of Rock Materials PART 1. SUGGESTED METHOD FOR DETERMINATION OF THE UNIAXIAL COMPRESSIVE STRENGTH OF ROCK MATERIALS 1. SCOPE This method of test is intended to measure the uni- axial compressive strength of a rock sample in the form of specimens of regular geometry.
rock sample uniaxial compressive strength and deformability. The interdependence of uncertainty contribution is analyzed and guides for improving measurement uncertainty are given. The achieved uncertainties are compared to typical uncertainties in the determination of concrete and metallic material compressive strength and deformability.
Compressive strength or compression strength is the capacity of a material or structure to withstand loads tending to reduce size, as opposed to tensile strength, which withstands loads tending to elongate.
Uniaxial compressive strength of intact rock sci = 100 MPa Geological Strength Index GSI = 40 Constant mi = 10 Using the program RocLab1, the uniaxial compressive strength of the rock mass is calculated as sc = 3.307 MPa and the failure envelope for this rock mass is plotted in Figure 1.
Determination of Rock Strength and Deformability of Intact Rocks ... properties (uniaxial compressive strength), Young's modulus, point load index, Schmidt hardness) and dynamic properties (wave ...