Uniaxial compressive strength (UCS) is considered to be one of the important parameters in rock engineering projects. In order to determine UCS, direct and indirect techniques are employed. In the direct approach, UCS is determined from the laboratory UCS test. In indirect techniques determine UCS based on the nondestructive test findings which can be easily and quickly performed and require

Get Pricemeasurement 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.

Get PriceThe experiments were carried out on two types of rock in order to study variability of rock strain behaviour. Consequences on methodology of Young's modulus and Poisson's ratio determination based on obtained results are discussed as well. METHODS Uniaxial compression tests have been carried out on rock specimens equipped by strain gauges.

Get PriceJun 08, 2021The analysis of results confirms that the strength and mechanical properties of the Finnish rocks differ quite a lot depending on the place of occurrence. Based on the statistical analysis made in this thesis, have been lead out several multiple regression models for determination uniaxial compressive strength.

Get PriceHowever, the scale effect on uniaxial compressive strength (UCS) is an important parameter, particularly for special materials like coal and rock salt. The accurate determination of UCS under laboratory conditions makes it possible to reliably estimate in situ strength. In this study, the change in UCS attributable to scale was determined for

Get PriceOct 08, 2021Estimation on the uniaxial compressive strength (UCS) of rock is an important issue in geotechnical engineering. Empirical relation establishment for UCS estimation is particularly favorable since core sample measurement is expensive, time consuming, and even infeasible.

Get PriceThe uniaxial compressive strength (UCS) of rock is one of the most frequently used rock properties in civil and mining engi-neering practices. Bieniawski (1976) reported that mining engi-neers request for UCS more often than any other rock material properties. The UCSisrequiredas aninput in mostrockand mining engineering designs.

Get PriceJul 01, 20211.1 This test method covers the determination of the strength of intact rock core specimens in uniaxial compression and confined compression. The tests provide data in determining the strength of rock, namely: the uniaxial strength, shear strengths at varying pressures and varying temperatures, angle of internal friction, (angle of shearing

Get PriceThese findings [10] reveal that the sensitivity of rock strength due to changes in moisture content seems to vary from rock to rock.This sensitivity depends on the clay content of the rock being investigated [8]. A similar result was also found by Bell and Culshaw [9]. However, Dobereiner and DeFreitas [11] and Dyke and Dobereiner [12] pointed out that weaker sandstones are more sensitive to

Get PriceThe uniaxial compressive strength of a rock material constitutes the highest strength limit of the rock mass of which it forms a part. It is determined in accordance with the standard laboratory procedures. For the purpose of rock mass classification, the use of the well -known point load strength

Get PriceDec 23, 2021Ultrasonic techniques are a simple, cost-effective, portable and non-destructive approach for evaluating the uniaxial compressive strength (UCS) of rocks. However, there are a number of factors affecting the ultrasonic pulse velocity (V p) values. The main factors controlling the reliability of the method are surface irregularities of rock

Get PriceThe uniaxial compressive strength (UCS) of rock is a basic parameter in underground engineering design. The disadvantages of this commonly employed laboratory testing method are untimely testing, difficulty in performing core testing of broken rock mass and long and complicated onsite testing processes. Therefore, the development of a fast and simple in situ rock UCS testing method for field

Get PriceApr 28, 2021Uniaxial compressive strength of rock may be predicted from the following equation. q c = 22*I s50 Mpa. Report. The corrected mean value of the point load strength index I s50 is reported in Mpa. 2. Axial Test Axial Test Procedure. The axial test is conducted on rock core sample of small length.

Get Pricepresent particular difficulties in the determination of the uniaxial compressive strengths. Salcedo (1983) has reported the results of a set of directional uniaxial compressive tests on a graphitic phyllite from Venezuela. These results are summarised in Figure 11.2. It will be noted that the uniaxial compressive strength of this material varies by

Get PriceUltrasonic techniques are a simple, cost-effective, portable and non-destructive approach for evaluating the uniaxial compressive strength (UCS) of rocks. However, there are a number of factors affecting the ultrasonic pulse velocity ( V p) values. The main factors controlling the reliability of the method are surface irregularities of rock, micro-cracks and discontinuities, moisture content

Get PriceMethod 4.3.1: Rock strength tests— Determination of deformability of rock materials in uniaxial compression—Strengths of 50 MPa and greater 1 SCOPE This Standard sets out the method for determining the stress-strain characteristics and Young's modulus, and Poisson's ratio in uniaxial compression of a rock sample in the form

Get PriceInitial Damage of Rock and Its Effect on Uniaxial Compressive Strength of Rock ZHANG Li-jie;ZHU Jie-;LUO Jian-yu;ZENG Ping;Faculty of Engineering,China University of Geosciences;Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources,Yangtze River Scientific Research Institute;Logistics Center,Yangtze River

Get PriceEstimation for the Uniaxial Compressive Strength of Rocks in Korea using the Point Load Test점하중시험을 이용한 국내 암석의 일축압축강도산정 연구. Hak Joon Kim 1 *. 김 학준 1 *. 1 Department of Construction Safety and Diaster Prevention, Daejeon University. 1 대전대학교 건설안전방재공학과.

Get PriceDec 07, 2021DETERMINATION OF UNIXIAL COMPRESSIVE STRENGTH OF ROCK CORES . 1. SCOPE 1.1. This method of test is intended for use in determining the uniaxial compressive strength of rock core samples collected from Agency projects. 2. REFERENCE DOCUMENTS 2.1. ASTM D7012 - 10 Standard Test Method for Compressive Strength and Elastic

Get PriceCohesion (c) and friction (φ) angle are the two key parameters required in numerical simulations and designs of underground openings, excavations, and foundations in rocks. The paper discusses a simple method, based on a theoretical framework, to determine the two parameters from uniaxial compression test and indirect tensile strength test.

Get PriceDETERMINATION OF ROCK JOINT SHEAR STRENGTH BASED ON ROCK PHYSICAL PROPERTIES Rutthapol Kemthong A Thesis Submitted in Partial Fulfillment of the Requirements for thethe uniaxial compressive strength (UCS or joint wall strength), and the joint roughness coefficient (JRC). The saw-cut

Get PriceDetermination of the physicomechanical properties of intact rocks is very important to the classification of rocks for engineering applications such as foundations, underground structures, slope stability, and dam projects.Prediction of uniaxial compressive strength of intact rocks using ultrasonic pulse velocity and rebound-hammer number

Get Pricestrength of rocks. When tensile strength test data are not available, the general approach to estimate rock ten-sile strength makes use of the correlation between uniaxial compressive strength ( c) and ten-sile strength ( t) and applies the generally agreed relationship of c

Get PriceJul 15, 2021misc{etde_20214132, title = {Correlation between uniaxial compressive strength and point load index for salt-range rocks} author = {Akram, M, and Bakar, M A.A.} abstractNote = {Nine rock types including Sandstone, Limestone, Siltstone, Dolomite and Marl collected from six different rock formations of the Salt Range area of Pakistan were tested to evaluate the correlations between the uniaxial

Get PriceFeb 28, 2021However, the uniaxial compressive strength test is expensive and time consuming. Moreover, the uniaxial compressive strength test cannot be performed in the field. In order to solve this kind of problem, many foreign researchers investigated the use of the point load strength test for the estimation of uniaxial compressive strength of rock.

Get PriceAug 15, 20211.1 These four test methods cover the determination of the strength of intact rock core specimens in uniaxial and triaxial compression. Methods A and B determine the triaxial compressive strength at different pressures and Methods C and D determine the unconfined, uniaxial strength.

Get PriceIn the study conducted on the TBM construction site of Zhongtianshan Tunnel, point load test (PLT) of rocks is adopted to measure the rock strength and the data is compared with those of the uniaxial compressive strength (UCS). Finally, the correlation between the two is revealed through regression analysis method.

Get Price2.3. Strength and durability Although the uniaxial compressive strength test is a routine test and is performed frequently, there are only a few publications [21,22] relating this test to dura-bility. Eigenbrod [21] investigated the change in com-pressive strength with increasing moisture content. He concluded that compressive strength

Get PriceThe determination of compressive strength of a building stone involves making standard test specimensDuring the last few years thousands of tests have been made to classify the rocks on the basis of uniaxial compressive strength in to grades. The following classification proposed by and Miller has beenClass Description Uniaxial

Get Price(ISRM) have standardized the testing procedure of this rock strength. Although, the method is relatively si m-ple, sometimes due to complex inherent characteristics of certain rocks, carrying out uniaxial compressive strength test in laboratory becom es not easy particularly from weak, stratified, highly fractured and weathered rocks.

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