The most common test used to measure the strength of a rock is the unconfined com-pressive strength test (UCS). Once a representative number of UCS tests have been carried out, the confined strength of the rock can be calculated using standard engi-neering calculations. Due to the cost of carrying out numerous UCS tests, …
Empirical relationships for estimating Uniaxial Compressive Strength (UCS) of rock from other rock properties are numerous in literature. This is because the laboratory procedure for determination of UCS from compression tests is cumbersome, time consuming, and often considered expensive, especially for small to medium-sized …
Three different types of soil designated as S 1, S 2 and S 3 in the present study were undertaken. The soils were collected from three different locations in Silchar city within 2 m of the ground surface.The engineering properties of the soils conforming to relevant Indian Standard Code of Practice are presented in Table 1mercially …
The rock tested was Longmaxi Shale, characterized by consistent discontinuities (bedding planes) and a strength under unconfined compression of 73.3 …
WEBbetween strain hardening and softening is called the unconfined compressive strength of the rock and is denoted as C o or q u . Failure takes place continuously from C to D …
In this test method, unconfined compressive strength is taken as the maximum load attained per unit area or the load per unit area at 15 % axial strain, whichever is secured first during the performance of a test. 3.2.2 shear strength (su)—for unconfined compressive strength test specimens, the shear strength is calculated to be 1⁄2 of the ...
The unconfined compressive strength (UCS) is a crucial factor in geotechnical engineering analysis and design, despite the strict test limitations set by codes.
The estimated value for undrained shear strength is, therefore, only valid for soils of low permeability, which behave sufficiently undrained during the test. NOTE This document fulfils the requirements of unconfined compression tests for geotechnical investigation and testing in accordance with EN 1997-1 and EN 1997-2.
The unconfined compressive strength (UCS) of intact rocks is an important geotechnical parameter for engineering applications. Determining UCS using standard laboratory tests is a difficult ...
The unconfined compressive strength (q u), which accurately describes the undrained conditions of fine-grained (cohesive and semicohesive) foundations, is widely used in almost all geotechnical engineering applications, such as buildings, bridges, dams, and embankments.Two soil parameters, the undrained shear strength (S u) and …
The effect of different unconfined compressive strengths (UCS) of rock on the extent of damage produced due to blast loading has been investigated. UCS representing …
In this study, 31 empirical equations are summarized that relate unconfined compressive strength and internal friction angle of ... and limestone and dolomite) to physical properties (such as velocity, modulus, and porosity). These equations can be used to estimate rock strength from parameters measurable with geophysical well logs. The ability ...
Limestone and Dolomite which comes under a category of soft to medium ... The Unconfined compressive strength and Compressive strength of microfine cement + 3% sodium silicate slurry is obtained by casting cylindrical cubes and 70*70mm square respectively in accordance with IS 9143:1979 and results are obtained which is
The unconfined compressive strength (UCS) is one of the most important parameters in characterising rock material behaviour. Hence the UCS is crucial in understanding the failure mechanism of fractured rocks. ... Based on the investigation of the failed rock specimens of sandstones and dolomite under triaxial compression tests, …
The unconfined compressive strength (UCS) of rocks, one fundamental parameter, is widely used in geotechnical engineering. Direct determination of the UCS involves expensive, time-consuming and destructive laboratory tests. These tests sometimes are difficult to be prepared for cracked rocks. In this way, indirect estimation …
The uniaxial compressive strength and static Young's modulus ( Es ) of intact rocks are the most important geotechnical parameters for stability analysis of surface and underground structures. These parameters are obtained by the uniaxial compressive test. Although this test is simple, the preparation of the samples, especially of soft rocks, is a hard and time …
Apart from conventional mechanical rock properties (unconfined compressive and tensile strength, Young's modulus) a new property for toughness referring to drillability has been introduced: the ...
pressive strength values, a description of the rock type is ... Dolomite 143 19. Marble 135. ... Assessments of failure mode and strength behavior of unconfined anisotropic rock mass are difficult ...
Many studies have shown that artificial neural networks (ANNs) are useful for predicting the unconfined compressive strength (UCS) of rocks. However, ANNs do have some deficiencies: they can get trapped in local minima and they have a slow learning rate. It is widely accepted that optimization algorithms such as particle swarm optimization …
Unconfined compressive strength ((S_{u})) is one of the soil engineering parameters used in geotechnical designs.Due to the temperature changes caused by some human activities, it is important to study the changes in (S_{u}) at different temperatures. On the other hand, due to the differences in the mineralogical composition of clay soils, …
The unconfined compressive strength (UCS) of soils is essential for both researchers and practitioner geotechnical engineers. UCS is well-understood and standardized for laboratory and field tests. Nevertheless, the large number of environmental and physical governing factors makes the reasonable prediction of UCS complicated. In …
dolomite and granite rocks reported decreased uniaxial compressive strength with increasing grain size. In these cases, Griffith's theory of elliptical cracks is used to in …
The relationship between the uniaxial compressive strength of rocks and the point load index has been extensively studied in the literature (Tandon and Gupta, 2015), including cases with ...
STRENGTH OF SOILS AND ROCKS 8.1 COMPRESSIVE STRENGTH For the uniaxial or unconfined compressive strength test a right circular Indiana limestone 6.7 42 ... Effect of Dolomite Limestone Powder on the Compressive Strength MBMST 2013 Effect of Dolomite Limestone Powder on The Compressive Strength of Concrete .
It was found that the compressive strength of recycled aggregate was much lower than quarry aggregate and the admixtures such as silica fume which could enhance the strength of cement paste binder ...
Recall procedure for determination of the unconfined compressive strength of cohesive soil in the intact, remolded, or reconstituted condition, using strain-controlled application of the axial load. Identify equations used for calculation of axial strain, average cross-sectional area, compressive strength, and sensitivity.
Unconfined compressive strength (UCS) is a major mechanical parameter of the rock which has an essential role in developing geomechanical models. It can be estimated directly by lab testing of retrieved core samples or from well log data. These methods are very expensive and require huge efforts and time. Therefore, there is a …
In this study, the sound wave speed (SWS) variation and stress–strain behavior of fiber-reinforced cement-stabilized clay soil samples were investigated through ultrasonic and unconfined compressive strength (UCS) tests. Polypropylene (PP), polyester (PE), polyethylene terephthalate (PET), and glass fiber with several diameters …
Amongst the various strength characteristics of rocks, the unconfined compressive strength (UCS) is the parameter most commonly used to evaluate rock …
Amongst the various strength characteristics of rocks, the unconfined compressive strength (UCS) is the parameter most commonly used to evaluate rock mass classifications and analyze slope stability, and it is also helpful when evaluating the drillability and cuttability of rocks used for tunneling (Thuro 1997). In order to gauge the …
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