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dc.contributor.authorMac, Monika Jolanta
dc.contributor.authorYio, Marcus H.N.
dc.contributor.authorDesbois, Guillaume
dc.contributor.authorCasanova Hormaechea, Ignasi
dc.contributor.authorWong, Hong S.
dc.contributor.authorBuenfeld, Nick R.
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental
dc.identifier.citationMac, M. [et al.]. 3D imaging techniques for characterising microcracks in cement-based materials. "Cement and concrete research", Febrer 2021, vol. 140, p. 106309:1-106309:14.
dc.description.abstractConcrete inherently contains pores and microcracks that can adversely impact its mechanical properties and long-term durability. However, characterising microcracks is difficult due to their complex, multiscale and three-dimensional (3D) nature. This paper presents an evaluation of 3D imaging techniques for characterising microcracks induced by different mechanisms. Seven cement pastes, mortars and concretes subjected to drying shrinkage, autogenous shrinkage and freeze-thaw cycles were investigated using focused ion beam nanotomography (FIB-nt), broad ion beam serial section tomography (BIB-SST), laser scanning confocal microscopy (LSCM) combined with serial sectioning and X-ray microtomography (µCT). The study shows that the characteristics of microcracks vary significantly depending on exposure conditions. Yet there is no single technique that can capture the entire size range of microcracks from sub to tens of µm within a sufficiently representative sampling volume. The achievable image volume and resolution, and the advantages and disadvantages of each technique are compared and discussed.
dc.description.sponsorshipM.J. Mac acknowledges the funding from the European Union Seventh Framework Programme under grant agreement 264448. We thank Dr. Trifon Trifonov from Universitat Politècnica de Catalunya (UPC) and Dr. Lidija Korat from the Slovenian National Building and Civil Engineering Institute (ZAG) for their assistance with the Zeiss Neon 40 cross beam and the Xradia MicroXCT-400 respectively. We also thank the Natural History Museum, Zeiss (Cambridge, UK) and FEI (Houston, USA) for providing X-ray μCT scans with the Metris X-Tek HMX ST 225, Xradia 520 Versa and Helican microCT respectively.
dc.rights© 2019. Elsevier
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International
dc.subjectÀrees temàtiques de la UPC::Enginyeria civil::Materials i estructures::Materials i estructures de formigó
dc.subject.lcshConcrete -- Cracking
dc.subject.otherImage analysis
dc.subject.other3D imaging
dc.title3D imaging techniques for characterising microcracks in cement-based materials
dc.subject.lemacFormigó -- Fissuració
dc.contributor.groupUniversitat Politècnica de Catalunya. NEMEN - Nanoenginyeria de materials aplicats a l'energia
dc.description.peerreviewedPeer Reviewed
dc.rights.accessRestricted access - publisher's policy
dc.description.versionPostprint (author's final draft)
local.citation.authorMac, M.; Yio, M.; Desbois, G.; Casanova, I.; Wong, H.; Buenfeld, N.
local.citation.publicationNameCement and concrete research

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