compressive strength of rock core

1.1 To establish a procedure for testing the unconfined compressive strength of rock core specimens. 2.0 SCOPE 2.1 This procedure shall apply to nominal 2-inch (51 mm) diameter rock core specimens obtained for the purpose of determining the uniaxial compressive strength of rock. 2.2 This procedure will specify the requirements for the apparatus

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

Point load testing is used to determine rock strength indexes in geotechnical practice. The point load test apparatus and procedure enables economical testing of core or lump rock samples in either a field or laboratory setting. In order to estimate uniaxial compressive strength, index-to-strength

Compressive strength (qu = F u) of core in unconfined compression (uniaxial compression test) - D 2938* Triaxial compressive strength without pore pressure T 226 D 2664 Creep Tests Creep-cylindrical hard rock core in uniaxial compression - D 4341 Creep-cylindrical soft rock core in uniaxial compression - D 4405 Creep-cylindrical hard rock core

of the core is observed or suspected, its nature and degree should be recorded after the description of the basic parameters. Intact rock strength . The uniaxial compressive strength of a rock material constitutes the highest strength limit of the rock mass of which it forms a part

0.2 The unconfined compressive strength test is primarily an index test for strength classification of rock materials. Although it may be used in the laboratory, it is mainly intended for field measurements on rock core and outcrop specimens. The apparatus used in the test is light and

Jul 17, 2009 One of the parameters which affect the uniaxial compressive strength (UCS) of rock materials is the length to diameter ratio (L/D) of test cores. ASTM recommends a ratio of between 2 and 2.5, and ISRM suggests 2.5–3:1. Research has shown that high UCS values are obtained for L/D ratios 2, a very slight difference in values between 2 and 2.5, and they remain effectively constant with a L/D

Keywords: soft rock, uniaxial compressive strength, physical characte ristic, point load strength index, and conversion factor. INTRODUCTION strength due to changes in moisture content seems 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

Crushing in Mineral Processing 911 Metallurgist. 26/12/2015 The Compressive Strength of rocks is measured by crushing cylinder shaped (drill core) ore samples of 2″ x 2″ (51mm X 51mm) This techniques allows for a rocktorock relative comparison The Bond’ Crushing Work Index is

Feb 26, 2019 This study aimed to evaluate the effect of length-to-diameter ratio (L/D) of a rock core specimen on uniaxial compressive strength (UCS) and to investigate the optimum L/D range for different rock types. For this purpose, a considerable amount of rock block was compiled and a series of laboratory tests were carried out to determine some geo-mechanical properties of the rocks and the UCS values

Apr 08, 2016 Measurement of the compressive strength and elastic modulus of the skeletal material of three common Caribbean corals suggests that the mechanical properties of coral skeleton are an important factor in the adaptive repertoire of these animals

uniaxial compressive strength of tested rocks. Tables 1, 2 and 3 give an example for the calculation of specific energy (SE) and UCS/SE in limestones, marbles and granites at different loads and drilling speed of 1000 rpm. Each rock type has been represented by its compressive strength. By the same way results of

International Journal of Rock Mechanics & Mining Sciences 43 (2006) 554–561 Estimating the uniaxial compressive strength of a volcanic bimrock H. Sonmeza,, C. Gokceoglua, E.W. Medleyb, E. Tuncaya, H.A. Nefesliogluc aDepartment of Geological Engineering, Applied Geology Division, Hacettepe University, 06532 Beytepe, Ankara, Turkey

1.5 This standard replaces and combines the following Standard Test Methods: D2664 Triaxial Compressive Strength of Undrained Rock Core Specimens Without Pore Pressure Measurements; D5407 Elastic Moduli of Undrained Rock Core Specimens in Triaxial Compression Without Pore Pressure Measurements; D2938 Unconfined Compressive Strength of Intact Rock Core Specimens; and D3148 Elastic Moduli of Intact Rock Core Specimens in Uniaxial Compression

Sep 15, 2016 Unconfined Compressive Strength Test of Rock. 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, and neoprene caps are used on the specimen ends

Table 1. Typical values of uniaxial strength (in MPa) for nine common rock types (after Johnson and Degraff, 1988). Rock Tensile Strength (MPa) Compressive Strength (MPa) Limestone Sandstone Sandstone Sandstone Mudstone Limestone Limestone Ironstone Sandstone 18.00 0.62 (20) 19.17 0.21 (23) 23.10 0.48 (19) 24.21 0.83 (8) 35.17 3.17 (4) 36.28 1.24 (24)

Withdrawn Rationale: This test method specifies the apparatus, instrumentation, and procedures for determining unconfined compressive strength of intact rock core specimens. Formerly under the jurisdiction of Committee D18 on Soil and Rock, this test method was discontinued in May 2005 and replaced by D 7012, Test Method for Compressive Strength and Elastic Moduli of Intact Rock Core Specimens Under Varying