The Mechanical Behavior of Mudstone Under Coupling …
Clay-rich rocks such as mudstone have a great affinity for water due to the formation of a diffuse double layer around the negatively charged minerals. This makes the behavior of this rock type unique when exposed to different temperatures. Therefore, the tensile, compressive, and shear mechanical behaviors of mudstone were investigated …
Triaxial Compression Test in Rock
where σ ci is the uniaxial compressive strength, m i is a constant based on the rock type, σ 1 and σ 3 are the principal stresses. After conducting at least 3 triaxial tests in different lateral pressures, the best-fit envelopes of the criterion selected are plotted and the parameters of each one (cohesion, friction angle in M-C and m i, σ ...
Prediction of Rock Abrasivity Index (RAI) and Uniaxial Compressive …
Rock abrasivity index (RAI) and uniaxial compressive strength (UCS) are two key parameters for assessing abrasivity and durability of building stones, respectively. Direct determination of these parameters is a time-consuming, tedious and costly task. Hence, indirect and nondestructive tests such as P-wave velocity (Vp) and Schmidt …
The Uniaxial Compressive Strength of Soft Rock
A rock with a UCS range of 0.25-25 MPa is classified as extremely weak to weak rock [10]. Another definition of soft rock given by [11] as any rock with UCS less than 20 MPa; [12] presented a ...
Compressive strength of stone
The compression strength of the stone is carried out to determine the compressive strength of the stone. To perform this test take 6 test blocks of dimensions 10cmx10cmx10cm are taken. These blocks are then covered with plaster of Paris subjected to load in the compression testing machine one by one.
Progressive damage and fracture behavior of brittle rock …
The deformation characteristics, failure strength and fracture toughness of rock under external loads show obvious strain rate effect (Cao et al. 2023; Alneasan and Behnia 2021; Xu et al. 2023).At present, many scholars have studied the failure mechanical behavior of rocks under three loading rates of quasi-static, medium strain rate and high …
Mechanical properties of rock under uniaxial compression …
To study the influence of control mode and loading rate on mechanical property of rock, uniaxial compression tests of four types of rocks (gray sandstone, red …
STRENGTH PROPERTIES OF ROCKS AND ROCK MASSES
DEFORMABILITY PROPERTIES OF ROCKS AND ROCK …
WEBand in equation (8), D is the rock density in g/cm3. Kazi et al. (1983) proposed an empirical equation relating the uniaxial compressive strength of intact rocks to their dynamic …
Evaluation of the Compressive Strength of Ancient Clay …
A wide range of compressive strength was found by destructive compressive testing, ranging from 6.7 to 21.8 N ∕ mm 2. The paper shows that it is possible to reliably estimate the compressive strength of bricks by means of regression curves using the adopted microdrilling technique.
Empirical relations between rock strength and physical …
Eqs. (1)–(11) in Table 1 present a number of relationships in common practice (both published and proprietary) for estimating the unconfined compressive …
Rock mass properties
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Experimental Investigation on Uniaxial Compressive Strength …
Thin sandstone is a widely used building material; however, its compressive behavior is not well understood. Four groups of cylinders were manufactured in a factory to investigate the uniaxial compressive behavior of red sandstone. Uniaxial compression tests were performed to determine the compressive behavior and failure …
Relationship between rock uniaxial compressive strength and digital
The rock uniaxial compressive strength (UCS) is the basic parameter for support designs in underground engineering. 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 …
The influence of fine aggregates on Portland cement mortar compressive …
The studies regarding the influence of stone-extracted materials on the mechanical properties of Portland cement mortars, has a growing interest in Mexico due to its geological diversity. ... (igneous and sedimentary) can have similar behavior regarding compressive strength. The amorphous fraction of the pink sand aggregate was …
Experimental characterization of stone masonry in shear …
Here, the shear and compressive strength parameters of stone masonry using granite blocks are provided. In addition, a first aspect addressed is the shape of the shear stress- ... behavior of ...
DEFORMABILITY PROPERTIES OF ROCKS AND ROCK …
determining the uniaxial compressive strength and deformability of rock materials, Int. J. Rock Mech. Min. Sci. & Geomech. Abstr., Vol. 16, No.2, pp. 135-140. ... stone Sand-stone Shale Av. E Max. E Min. E Range No. of samples 59.3 75.5 26.2 49.3 24 62.6 100.6 34.9 65.7 16 58.6 81.0 ... Linearity in the material behavior in uniaxial compression ...
Compressive and Failure Strength of Sand Stone with …
The uniaxial compressive strength is an important parameter in selecting and design of rock and brittles structure. Protection of ancient monuments or historic structure has a great intense in ...
Analysis of Young's modulus for Carboniferous
The laboratory uniaxial compression test, triaxial compression test as well as ultrasonic or acoustic emission investigations can be used to evaluate the strength parameters of rocks (Madhubabu et al., 2016; Yu, Ji, & Li, 2016).In the test process, elastic rock behaviour can be well observed and measured up to the point when cracks start …
Evaluation of Pore Size and Distribution Impacts on Uniaxial
Discrete element method (DEM) has been extensively used for studying the properties of rock mass through numerical simulation, which includes bonded particle (or grain) model method (BPM) and discrete fracture network method. In this paper, utilization of BPM for modeling uniaxial compressive strength (UCS) of lithophysal rock is …
Estimating uniaxial compressive strength of …
Lamination planes lead to anisotropic behavior of rock properties such as strength, deformation, permeability, and ultrasonic wave [5] Travertine £ £ £ £ Hosseini and Khodayari [6] Sandstone ...
Confined compressive strength model of rock for drilling …
1. Introduction. The confined compressive strength (CCS) is one of the most important parameters for drilling optimization, bit selection, and prediction for the rate of penetration (ROP).A large number of ROP models presented in the literature have considered the effect of the rock strength on ROP such as Bourgoyne and Young's …
Study of the uniaxial compressive strength of water …
Fundamental research on single-particle breaking and the uniaxial compressive strength (UCS) of carbonaceous mudstone aggregates at different water contents was carried out to investigate the relationship between the single-particle crushing strength and UCS. Based on elasticity theory and the superposition principle, a shape …
Criterion for residual strength and brittle-ductile transition of
The brittle-ductile transition (BDT) of brittle rock is of great significance in geophysics and rock mechanics, and plays a key role in earthquake mechanics, related …
Dynamic compressive properties of dry and saturated coral …
1. Introduction. The presence of free water is one of the most vital factors influencing the mechanical behaviors of geomaterials. It is widely recognized that rocks suffer from strength and stiffness reduction induced by water content (Burshtein, 1969; Colback and Wiid, 1965; Krokosky and Husak, 1968).Normally, both strength and …
Empirical relations between rock strength and physical …
rock strength to parameters measurable with geophys-ical well logs. The use of such relations is often the only way to estimate strength in many situations due to the …
The unconfined compressive strength estimation of rocks …
The unconfined compressive strength (UCS) of rocks is a crucial factor in geotechnical engineering, assuming a central role in various civil engineering undertakings, including tunnel construction, mining operations, and the design of foundations. The precision in forecasting UCS holds paramount importance in upholding the security and …
Experimental Investigation on the Strength, Deformability, …
Conventional triaxial compression and "reducing confining pressure" experiments were carried out for red sandstone by an MTS815 Flex Test GT rock mechanics experimental system. Our results show that the post-peak axial deformation characteristics of red sandstone changed as the confining pressure was increased from …
Stress-dependent Mohr–Coulomb shear strength parameters for intact rock
Rock strength is imperative for the design and stability analysis of engineering structures. The Mohr–Coulomb (M-C) criterion holds significant prominence in geotechnical engineering. However ...
Characterizing Tensile Strength of Building Sandstone via …
The tension strength of a rock is one of the fundamental mechanical properties in the structural design of building structures with stone columns, masonry walls, beams, and cladding . Natural sandstone is commonly used in masonry walls, cladding, and other components.
