Fracture Evolution Mechanism of Hollow Sandstone Under Conventional Triaxial Compression by X-ray Micro-CT Observations and Three-Dimensional Numerical Simulations

Abstract The paper presents a method of pore connectivity analysis applied to specimens of cement based composites differing in water to cement ratio. The method employed X-ray microtomography (micro-CT). Microtomography supplied digitized three-dimensional radiographs of small concrete specimens. The data derived from the radiographs were applied as an input into the application based on the algorithm called ‘random walk simulation’. As the result a parameter called diffusive tortuosity was established and compared with estimated porosity of examined specimens.

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Three-dimensional imaging of whole mouse models: comparing nondestructive X-ray phase-contrast micro-CT with cryotome-based planar epi-illumination imaging

Journal of Microscopy ◽

10.1111/jmi.12094 ◽

2013 ◽

Vol 253 (1) ◽

pp. 24-30 ◽

Cited By ~ 11

Author(s):

A. TAPFER ◽

M. BECH ◽

I. ZANETTE ◽

P. SYMVOULIDIS ◽

S. STANGL ◽

...

Keyword(s):

Mouse Models ◽

Phase Contrast ◽

Three Dimensional ◽

Micro Ct ◽

Three Dimensional Imaging ◽

X Ray

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Micro-CT study of Middle Ordovician Spumellaria (radiolarians) from western Newfoundland, Canada

Journal of Paleontology ◽

10.1017/jpa.2019.88 ◽

2020 ◽

Vol 94 (3) ◽

pp. 417-435 ◽

Cited By ~ 2

Author(s):

Sarah Kachovich ◽

Jonathan C. Aitchison

Keyword(s):

Computed Tomography ◽

Three Dimensional ◽

Detailed Examination ◽

Micro Ct ◽

Micro Computed Tomography ◽

Lower Paleozoic ◽

X Ray ◽

Middle Ordovician ◽

Radiolarian Assemblage ◽

Taxonomic Groups

AbstractA new, previously undescribed Middle Ordovician (middle Darriwilian: Dw2) radiolarian assemblage has been recovered from the Table Cove Formation at Piccadilly Quarry, western Newfoundland. Constituents of the fauna described herein are both distinctive and exceptionally well preserved. Three-dimensional X-ray micro-computed tomography (μ-CT) is used to make a detailed examination of four key spumellarian specimens. This technology enables visualization of hitherto ambiguous details of the internal morphologies of key lower Paleozoic taxonomic groups, among which a lack of knowledge has impeded resolution of higher taxonomic rankings.

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Statistical Assessment of the Microstructure of Barite Aggregate from Different Deposits Using X-Ray Microtomography and Optical Microscopy

Archives of Metallurgy and Materials ◽

10.1515/amm-2017-0104 ◽

2017 ◽

Vol 62 (2) ◽

pp. 697-702

Author(s):

N. Żołek ◽

Z. Ranachowski ◽

P. Ranachowski ◽

D. Jóźwiak-Niedźwiedzka ◽

S. Kudela ◽

...

Keyword(s):

Optical Microscopy ◽

Barium Sulfate ◽

Three Dimensional ◽

Empty Space ◽

Paper Analysis ◽

Micro Ct ◽

Statistical Assessment ◽

Thin Sections ◽

X Ray ◽

Additional Information

AbstractTwo different barite ore (barium sulfate BaSO4) specimens from different localizations were tested and described in this paper. Analysis of the microstructure was performed on polished sections, and on thin sections using X-ray microtomography (micro-CT), and optical microscopy (MO). Microtomography allowed obtaining three-dimensional images of the barite aggregate specimens. In the tomograms, the spatial distribution of the other polluting phases, empty space as well as cracks, pores, and voids – that exceeded ten micrometers of diameter-were possible to visualize. Also, the micro-CT allowed distinguishing between minerals of different density, like SiO2and BaSO4. Images obtained and analyzed on thin sections with various methods using the optical microscopy in transmitted light delivered additional information on the aggregate microstructure, i.e. allow for estimation of the different kinds of inclusions (like the different density of the minerals) in the investigated specimens. Above methods, which were used in the tests, completed each another in order to supply a set of information on inclusions’ distribution and to present the important differences of the barite aggregate specimens microstructure.

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