Digital laminography assessment of the damage in concrete exposed to freezing temperatures

Wakimoto, Kentaro; Blunt, Joshua; Carlos, Cruz; Monteiro, Paulo J.M.; Ostertag, Claudia P.; Albert, Richard D.

doi:10.1016/j.cemconres.2008.05.003

Cited by 27 publications

(15 citation statements)

References 5 publications

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“…Effective maintenance and management of concrete structures require evaluation of the degree of concrete damage. Several techniques are used to investigate concrete materials non-destructively, including the acoustic emission (AE) method [1,2], computed tomography (CT) [3][4][5], the nonlinear ultrasonic method [6], the elastic wave method [7,8] and the digital laminography method [9]. Among these methods, AE and CT are the most extensively applied.…”

Section: Introductionmentioning

confidence: 99%

Investigation of microstructural damage in shotcrete under a freeze–thaw environment

Chen

Deng

Luo

et al. 2015

Construction and Building Materials

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Section: Introductionmentioning

confidence: 99%

Investigation of microstructural damage in shotcrete under a freeze–thaw environment

Chen

Deng

Luo

et al. 2015

Construction and Building Materials

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“…Laminography is an alternative to tomography in this case. Laminography, having been used rather early in medicine, 193 has been applied more recently in engineering science 194,195 using laboratory sources 194,195 and even nanoCT laboratory systems. 196 Traditionally laminography can be thought of as the collection of radiographs with the object being rotated about an axis normal to the plate but inclined to the incident beam, although in purpose built machines, the source and detector precess around the sample.…”

Section: Local Tomography and Laminographymentioning

confidence: 99%

Quantitative X-ray tomography

Maire¹,

Withers²

2013

International Materials Reviews

1,058

601

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X-ray computer tomography (CT) is fast becoming an accepted tool within the materials science community for the acquisition of 3D images. Here the authors review the current state of the art as CT transforms from a qualitative diagnostic tool to a quantitative one. Our review considers first the image acquisition process, including the use of iterative reconstruction strategies suited to specific segmentation tasks and emerging methods that provide more insight (e.g. fast and high resolution imaging, crystallite (grain) imaging) than conventional attenuation based tomography. Methods and shortcomings of CT are examined for the quantification of 3D volumetric data to extract key topological parameters such as phase fractions, phase contiguity, and damage levels as well as density variations. As a non-destructive technique, CT is an ideal means of following structural development over time via time lapse sequences of 3D images (sometimes called 3D movies or 4D imaging). This includes information needed to optimise manufacturing processes, for example sintering or solidification, or to highlight the proclivity of specific degradation processes under service conditions, such as intergranular corrosion or fatigue crack growth. Besides the repeated application of static 3D image quantification to track such changes, digital volume correlation (DVC) and particle tracking (PT) methods are enabling the mapping of deformation in 3D over time. Finally the use of CT images is considered as the starting point for numerical modelling based on realistic microstructures, for example to predict flow through porous materials, the crystalline deformation of polycrystalline aggregates or the mechanical properties of composite materials.

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“…Liu et al (2014) numerically investigated the influence of freezing on micro-internal damage and macro-mechanical performance of cement pastes. Digital laminography was used as a non-destructive inspection method to image the concrete damage under low temperatures environment (Wakimoto et al 2008). Sicat et al (2014) experimentally investigated the deformational behavior of the interfacial transition zone (ITZ) in concrete during F-T cycles.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Damage in Concrete Suffered Freeze-Thaw Cycles by CT Technique

Tian

Han

2016

ACT

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The evolution and spatial distribution of internal random pore structure are key factors in damage mechanism and macro-mechanical properties of concrete material under freeze-thaw (F-T) environment. This paper was presented to discover the deterioration mechanism of concrete under F-T actions. Through the experiment, visual examination was employed to evaluate the surface damage; the degradation considering the mass loss and uniaxial compressive strength of concrete was statistically analyzed under F-T environment. Moreover, X-ray tomography was adopted to characterize the concrete internal structure subjected to F-T cycles. The specimens exposed to F-T environment were scanned at regular intervals. Coupled with CT test, the pore space was characterized in terms of porosity and pore distribution by image analysis. And the relationship between the pore structure and the F-T cycles was described quantitatively by the fractal theory. The results indicated that the fractal dimension of the pore structure presented "down-up" trend with the number of F-T cycles increasing. The pore structure evolution changed from chaos to order and then to a process of disorder. The results demonstrated that F-T cycles accelerated the generation of meso-damage in concrete, which leads to more severe damage under F-T cycles.

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Digital laminography assessment of the damage in concrete exposed to freezing temperatures

Cited by 27 publications

References 5 publications

Investigation of microstructural damage in shotcrete under a freeze–thaw environment

Investigation of microstructural damage in shotcrete under a freeze–thaw environment

Quantitative X-ray tomography

Evaluation of Damage in Concrete Suffered Freeze-Thaw Cycles by CT Technique

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