Limestone from Xuzhou, Jiangsu, China, was selected as the test material. This limestone is gray in its natural state and mainly composed of calcite, dolomite, illite, etc. The limestone has a uniform overall texture and has an average density of 2.71–2.73 g/cm 3. The rock specimens were processed into cylinders with a diameter of 50 mm …
According to the test standards set by the International Society of Rock Mechanics (ISRM), a standard cylinder test piece with a height of 100 mm and a diameter of 50 mm will be prepared (Fairhurst et al. 1999; Li et al. 2019; Song et al. 2022; Zhang et al. 2015).The specimen will be polished on both ends and sides to ensure that the two …
Four types of granite specimens were prepared and treated by chemical corrosion for 5 and 30 days, which were then used to carry out triaxial compression tests under different confining pressures σ3. Type A is the intact sample with no preexisting flaws. Types B and C are the samples containing two relatively low-dip flaws and two …
To explore the chemical and mechanical effects of acid mine drainage on water and rock, acid mine drainage (AMD) dissolution tests, triaxial compression tests, and acoustic emission tests were performed on limestone rock samples with different bedding dip angles. Combined with scanning electron microscopy and nuclear magnetic …
According to the colorful video images and experimental data from the laboratory uniaxial compression test of limestone,the displacement field was obtained in this paper. Using the digital image correlation (DIC) technique,the colorful video images were converted first into a readable format of frames,and then into the gray-scale …
The triaxial compression test of hard brittle limestone soaked in different pH value, 0.1 mol/l, Na2SO4, CaCl2 solution and distilled water is carried out; and the effect of chemical solution on ...
At the same time, both HJC and RHT constitutive models can simulate the laboratory impact test results of granite, marble, and limestone, however, the gypsum and reef limestone are not modelled by ...
Soluble rocks (mainly limestone) are widely distributed in China, with a distribution area of up to 3.65 million km 2, ... Uniaxial compression test: Uniaxial compression tests were conducted ...
DOI: 10.1007/s10064-024-03700-2 Corpus ID: 269373335; Static and dynamic compressive performance of coral reef limestone: interpretations of rate effect from laboratory tests
In this paper, a new true triaxial Hopkinson bar loading system is used to carry out dynamic compression tests of reef limestone concrete in dry and water …
Uniaxial compression tests were conducted on quartz mica schist in a laboratory to study the brittle failure modes of foliated rocks. By focusing on the crack evolution pattern, the failure mechanisms of foliated rocks were investigated by numerical tests based on particle discrete element theory. Furthermore, the effect of fabric on the …
that the yield point and strength of the limestone decreased with increasing temperature (Kılıç 2006; Nasseri et al. 2013; Thongsanitgarn et al. 2014). Zhang et al. (2015) found that cracks in the limestone increased slowly below 200 °C but rapidly above 300 °C. Uniaxial compression tests on Guiting
Research Article ClassificationandFractalCharacteristicsofLimestoneFragments ObtainedinConventionalCompressionandCyclicLoading TestsunderUniaxialandTriaxialConditions
This study analyzed uniaxial compression behavior and pore structural characteristics of four types of CRL using the uniaxial compression test and computerized tomography (CT) scanning test. The influence mechanism of CRL's physical properties on its uniaxial compression characteristics was revealed from a microscopic perspective.
Liu et al. 8 conducted a series of confined compression tests and triaxial tests under different test conditions on two types of calcareous sand specimens collected from the South China Sea. The ...
An extensive uniaxial and triaxial compression testing programme was performed on Indiana Limestone to assess its behaviour across the brittle–ductile transition. Particular attention has been paid to the post-yield evolution of strength and dilatancy. Specimens tested at σ 3 = 30 MPa displayed a fully ductile failure mechanism, …
The triaxial compression with permeability test of limestone samples was conducted by using the improved MTS815 Flex Test GT rock mechanics system of …
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) ... In order to overcome many of the problems associated with the unconfined compression test, Broch and Franklin (1972) proposed a testing method called the Point Load Test.
To study the influence of osmotic pressure on the uniaxial compression mechanical properties of limestone, uniaxial compression tests were carried out on limestone specimens under different osmotic...
limestone samples are shown in Tables and, respectively. e static uniaxial compression test of limestone com-pletes in the RMT-C system as shown in Figure ... e SHPB Impact Compression Test Apparatus and Cal-culation Principle. elarge diameter SHPB device (mm) is adopted in this experiment, which is jointly developed by
In this paper, the Split Hopkinson Pressure Bar tests were carried out on the specimens of deep coral reef limestone in the South China Sea, ... a series of quasi-static and dynamic compression tests along with microscopic examinations were performed on the reef limestone at shallow and deep burial depths. It is revealed that the shallow reef ...
The main chemical composition of the reef limestone from the South China Sea area was determined to be CaCO 3 by measuring using a Zetium fluorescence spectrometer, ... (INSTRON–1346) was used to conduct uniaxial compression tests on reef limestone. The technological parameters of the machine included vertical load of …
Tests on dynamic properties of coral-reef limestone in South China Sea [J]. Rock and Soil Mechanics, 2019, 40(1): 183-190. [10] PENG Shou-jian, WANG Zhe, XU Jiang, OKUBO Seisuke, TANG Yang, . Experimental study on loading rate effect in post-failure region of water-saturated rock under triaxial compression [J]. Rock and Soil Mechanics, 2018, 39 ...
With the practice of island and reef reclamation projects in the Nansha waters, the research on the physical and mechanical properties of reef limestone has gradually become a research focus in the field of engineering geology. A reef limestone core was obtained from a borehole with a depth of 300 meters on an island and reef in Nansha, …
The Unconfined Compression Test is a laboratory test used to derive the Unconfirmed Compressive Strength (UCS) of a rock specimen. Unconfirmed Compressive Strength (UCS) stands for the maximum …
value. Liu et al. (2021) carried out triaxial compression tests on microcrystalline coral framestone collected from the South China Sea to explore its damage properties, and proposed an empirical relationship between radial damage variable and radial strain. Elhakim (2015) conducted uni-axial compression tests on reef limestone collected from
The mechanical properties and damage behavior of coral limestone collected from the Zhongsha Islands, South China Sea were investigated based on the results of uniaxial compression tests.
Biogenic coral-reef limestone is distinct from the traditional geological rock. In this study, Hopkinson pressure bar tests on coral-reef limestone are conducted to investigate the dynamic ...
Effect of confining pressure on the (a) triaxial compression strength and (b) elasticity modulus of the argillaceous limestone specimens in the saturated and natural states, respectively.
In this paper, the Split Hopkinson Pressure Bar tests were carried out on the specimens of deep coral reef limestone in the South China Sea, and the difference of …
Abstract: To study the shock compression behavior and equation of state of shallow coral reef limestone subjected to high-intensity dynamic loadings, we conducted plate impact tests using a one-stage gas gun technique at impact …
Triaxial compression tests are conducted for the micritized framework reef limestone, which is sampled from a reef island in the South China Sea. The lateral strain response method (LSR) is...
In many geo-engineering fields, the uniaxial compressive strength (UCS) of a rock material is the parameter most commonly used to define a rock's mechanical strength. Several international standards have been developed for determining this value, which require the tested material to have certain minimum dimensions and shapes. In many …
The mechanical properties and damage behavior of coral limestone collected from the Zhongsha Islands, South China Sea were investigated based on the results of uniaxial compression tests.
The hydro-mechanical coupling often leads to both mechanical properties and stability deterioration during excavation of water-rich tunnel rock mass. Deformation and mechanical, fracture, and strain energy characteristics of limestone from Maixi tunnel in Guiyang (China) are investigated by hydro-mechanical coupling tests in this paper. …
The damage characteristics of coral limestone are of great significance for guiding the design and construction of offshore engineering such as submarine tunnels and pipelines. The mechanical properties and damage behavior of coral limestone collected from the Zhongsha Islands, South China Sea were investigated based on the results of …
A dynamic dissolution simulation experiment for limestone was constructed to investigate and analyze the variation patterns of the uniaxial compressive strength …
The quasi-static and dynamic compression tests were conducted on the four types of reef limestone samples to estimate the correlations of physical properties of reef limestone and its dynamic and static parameters. ... The main chemical composition of the reef limestone from the South China Sea area was determined to be CaCO 3 by …
In this paper, the Split Hopkinson Pressure Bar tests were carried out on the specimens of deep coral reef limestone in the South China Sea, and the difference of dynamic response between deep reef limestone and shallow calcified coral skeleton was revealed. ... and the dynamic uniaxial compression test becomes an undrained …
