Multiscale X-ray tomography of cementitious materials: A review

Brisard, Sébastien; Serdar, Marijana; Monteiro, Paulo J.M.

doi:10.1016/j.cemconres.2019.105824

Cited by 156 publications

(61 citation statements)

References 352 publications

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“…Both parameters are mainly determined by mercury intrusion porosimetry (MIP) [52], kerosene porosity, or by imaging methods, e.g. backscattered electron (BSE) imaging [28,[53][54][55] and X-ray micro-computed tomography (X-ray μCT) [56,57]. The last technique is also used for estimating the size and distribution of aggregates in the structure.…”

Section: Cement-based Materialsmentioning

confidence: 99%

Reinforced concrete structures: A review of corrosion mechanisms and advances in electrical methods for corrosion monitoring

Rodrigues

Gaboreau

Gance

et al. 2021

Construction and Building Materials

193

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Steel corrosion is the main cause of deterioration of reinforced concrete (RC) structures. We provide an up-to-date review on corrosion mechanisms and recent advances in electrical methods for corrosion monitoring. When assessing corrosion mechanism, the inherent heterogeneity of RC structures and the significant effect of environmental factors remain major issues in data interpretations. The steel surface condition and local inhomogeneities at the steel-concrete interface appear to have an important effect on corrosion initiation. Considering uniform corrosion in atmospherically exposed reinforced concrete, the two main influencing factors of the corrosion process are the water content and the pore structure at the steel-concrete interface. However, irrespective of the depassivation mechanism, i.e. carbonation or chloride-induced corrosion, nonuniform corrosion is expected to be the main process for RC structures due to local variations in environmental exposure or the presence of interconnected rebars with different properties. Future studies may then be focused on their effect on macrocell corrosion to gain further insights in the corrosion mechanisms of RC structures. Concerning corrosion monitoring using electrical methods, the half-cell potential technique with potential mapping is accurate for locating areas with a high corrosion risk. Recent developments in the measurement of concrete resistivity have shown that the use of electrical resistivity tomography allows to consider appropriately the inherent heterogeneity of concrete and provides more insights on transport phenomena (e.g. water and salts ingress) in the material. Nevertheless, during the corrosion propagation stage, the polarization resistance remains the most important parameter to be determined as it provides quantitative information of the corrosion rate. If conventional three-electrode configuration methods can supply an accurate determination in the case of uniform corrosion, they often fail in the case of macrocell corrosion in field experiments. Recent advances have shown that a four-electrode configuration without any connection to the rebar can rather be used for the non-destructive testing and evaluation of corrosion. If studies are still required to quantify the corrosion rate, this method appears sensitive to localized corrosion and thus more suitable to field investigations. Finally, the coupling of numerical simulations with complementary electrical and other non-destructive testing methods is essential for consolidating the results to provide a better diagnosis of the service life of RC structures.

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Section: Cement-based Materialsmentioning

confidence: 99%

Reinforced concrete structures: A review of corrosion mechanisms and advances in electrical methods for corrosion monitoring

Rodrigues

Gaboreau

Gance

et al. 2021

Construction and Building Materials

193

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“…It provides 3D images of objects that reveal their internal structure (see e.g. (Brisard et al, 2020) for detailed information on the method). It has been used, for example, to visualise the microstructure of hemp shiv (Ceyte, 2008;Jiang et al, 2018;Bennai et al, 2018).…”

Section: X-ray Computed Tomographymentioning

confidence: 99%

Densities of hemp shiv for building: From multiscale characterisation to application

Glé

Lecompte

Ménibus³

et al. 2021

Industrial Crops and Products

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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“…CT scan is a developed X-ray machine for providing clearer images from bones, tissue, and organs. The X-ray method is easier, quicker, and more economical than CT, but it is a more harmful method than that [15] . By taking X-ray images from the chest, doctors can visually diagnose Viral, Bacterial, COVID-19 infections, and so on.…”

Section: Introductionmentioning

confidence: 99%

COVID-19 detection using chest X-ray images based on a developed deep neural network

et al. 2022

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Multiscale X-ray tomography of cementitious materials: A review

Cited by 156 publications

References 352 publications

Reinforced concrete structures: A review of corrosion mechanisms and advances in electrical methods for corrosion monitoring

Reinforced concrete structures: A review of corrosion mechanisms and advances in electrical methods for corrosion monitoring

Densities of hemp shiv for building: From multiscale characterisation to application

COVID-19 detection using chest X-ray images based on a developed deep neural network

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