The unconfined compressive strength (UCS) of a rock is one of the various parameters required to determine the slope stability of rock formations, to study tunnel …
This research presented a new laboratory test for estimating rock's UCS, from rock cuttings. However, to perform the test in this study, an apparatus was used which could carry out uniform, slow, and controlled load on single particles. The UCS of 10 microcrystalline limestone block samples, from Asmari formation outcrops was determined.
The uniaxial compressive strength (UCS) test is crucial in determining the strength and stiffness behavior of intact rock and is frequently utilized by industry to …
different rock failure modes under uniaxial compression test. When uniaxial compressive strength (UCS) increased for the rock then the different types of failure modes can be seen accordingly. Generally rock samples fail through one or more extensional planes of the fracture development in brittle crystalline rock materials.
How do you conduct a UCS test? Test procedure. Take two frictionless bearing plates of 75 mm diameter. Place the specimen on the base plate of the load frame (sandwiched between the end plates). Place a hardened steel ball on the bearing plate. Adjust the center line of the specimen such that the proving ring and the steel ball are in …
The UCS test is a key indicator to determine the compressive strength of rocks (Liang et al., 2015). Likewise, the point load strength test is considered to be the best technique of the ...
The details about the 151 test shafts are summarized in the supplemental Table S1. In Table S1, the first column describes the rock type at the bottom of the test shaft. The second column lists the ({m}_{i}) value of the intact rock and the third column shows the UCS of the intact rock ({sigma }_{c}). In addition, the fourth and fifth ...
The conventional rock uniaxial compression test is a common method to measure the rock UCS (Chen et al. 2017; Liu et al. 2018; Meng et al. 2016; Xu and Dai …
The uniaxial compressive strength (UCS) is a mechanical property of intact rocks that is important in civil and mining engineering works (Aladejare 2020; Aladejare et …
load test need to be correlated with results of uni-axial compression test on the same rock formations. Such correlations on the same rock unit are not always available especially in rock masses of narrowly spaced horizontal joints. 3.1 Uni-Axial Compression Test The uni-axial compression test of rock samples were
1. Introduction. Uniaxial compressive strength (UCS) is an important mechanical parameter for rock classification, rock mass engineering design and rock mass stability analysis, and it can also be used to assess rock material strength in Rock Mass Rating (RMR). 1 Conventionally, the UCS of rocks can be determined by the uniaxial …
Based on their Uniaxial Compressive Strength, rocks can be characterized from very weak to very strong as following: Table 1:Classification of rock hardnesses (from Attewell & Farmer 1976). The range of the Uniaxial … See more
THE UCS AND PLT DATA BASE – DESCRIPTIVE STATISTICS The methodology used in the selection of core samples for testing was as follows: 1. Within each hole, rock units were identified where a sequence of tests had been performed with an identical geologic description and no major gaps in elevation. 2. Rock units with at least 3 UCS and 3 PLT ...
The UCS test simply records the collapse load during uniaxial loading of a cylindrical specimen. As suggested by many, the UCS is an index rather than a unique engineering parameter. The UCS is thus a proxy for rock strength which depends on the loading rate (e.g., Bieniawski 1967), specimen geometry (e.g., Hudson et al., 1971), …
Histograms of UCS test results completed on some homogeneous rock datasets. Showing fit normal distributions to each dataset. Statistical summary provided in Table 1. PDF-Probability Density …
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The highest correlation between the ESH and UCS is achieved by employing test procedure 1 (r = 0.8210; P-value = 0.000), suggesting that the incorporation of all recorded rebound values, rather than selecting only a certain portion of the readings (test procedure 2), could give a better representation of variations in the surface structure of …
The uniaxial compressive strength (UCS) is an important index for rock classification and rock mass quality evaluation. As one of the indispensable mechanical parameters in rock mass engineering design and stability analysis, UCS had been included in various standards and engineering codes, and its research significance could not be …
The uniaxial compressive strength (UCS) is a mechanical property of intact rocks that is important in civil and mining engineering works (Aladejare 2020; Aladejare et al. 2020; Wang and Aladejare 2016a).Design and stability analysis of underground excavations and other geotechnical structures require the input of data like UCS on the …
Rock engineers use the uniaxial compressive strength (UCS) of rocks prevalently in the design of surface and underground structures. UCS is one of the most important engineering parameters in rock mechanics, and it is used to characterize and examine the behaviors of solid rocks. Considering the difficulty of conducting tests on …
Basalt was used as an ornamental stone in many historic and ancient cities in Jordan. Measuring the uniaxial compressive strength (UCS) and the tangent Young's modulus (E t) in the laboratory ...
The U.C.S. value is expressed to 3 significant figures. Reference IS-9143-1979-Method for the determination of unconfined compressive strength of rock materials Objective The objective of this test is to determine unconfined compressive strength of rock. This test is primarily done to classify the rock on the basis of strength.
Uniaxial Compressive Strength (UCS) and compressibility indices are essential tests for calculation of bearing capacity and settlement of cohesive soil in the foundation of building construction. These tests are time-consuming and demand significant effort. Therefore, the Dynamic Cone Penetrometer Index (DCP) can be utilized as an …
In particular, the rock UCS should be obtained rapidly for underground engineering with complex geological conditions, such as soft rock, fracture areas, and high stress, to adjust the excavation and support plan and ensure ... The conventional rock uniaxial compression test is a common method to measure the rock UCS (Chen et al. 2017; Liu et ...
open access Abstract In engineering projects (dams, tunnels, slope stability) the strength characteristics of the rocks affect the construction operations. It is …
Les résultats montrent que le test de dureté Leeb peut être particulièrement utile pour l'estimation du champ de UCS. La méthode est simple, rapide et les coûts d'équipement sont faibles.
1. Introduction. Uniaxial compressive strength (UCS) is the most widely adopted rock property to represent in-situ rock strength. Accurate UCS estimation of the rock in the borehole wall is essential for a wide range of engineering applications, including the design and construction of dams and tunnels (Sopacı and Akgün, 2008; Gokceoglu et …
The UCS test is standardized by the American Society for Testing and Materials 1 and the International Society for Rock Mechanics 2, and it is widely accepted test used to attain the strength of ...
Many researchers have studied the relations between rock properties and ultrasonic pulse velocity, V p, and have found that V p is closely related to various rock properties (Yasar and Erdogan 2004).Inoue and Ohomi tested many soft rocks to confirm the relation between UCS and V p and density and ρ.The following general formula was …
The uniaxial compressive strength (UCS) test is crucial in determining the strength and stiffness behavior of intact rock and is frequently utilized by industry to determine project site characteristics. A fundamental procedure of UCS testing is strain response measurement. Conventionally, discrete strain measuring devices such as …