Imperial College London
Portrait Picture

Professor Hong S. Wong

Faculty of Engineering, Department of Civil and Environmental Engineering

Professor of Concrete Materials
 
 
 
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Contact

 

+44 (0)20 7594 5956hong.wong Website

 
 
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Assistant

 

Ms Ruth Bello +44 (0)20 7594 6040

 
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Location

 

228DSkempton BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Mac:2021:10.1016/j.cemconres.2020.106309,
author = {Mac, M and Yio, M and Desbois, G and Casanova, I and Wong, H and Buenfeld, N},
doi = {10.1016/j.cemconres.2020.106309},
journal = {Cement and Concrete Research},
title = {3D imaging techniques for characterising microcracks in cement-based materials},
url = {http://dx.doi.org/10.1016/j.cemconres.2020.106309},
volume = {140},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Concrete 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.
AU  - Mac,M
AU  - Yio,M
AU  - Desbois,G
AU  - Casanova,I
AU  - Wong,H
AU  - Buenfeld,N
DO  - 10.1016/j.cemconres.2020.106309
PY  - 2021///
SN  - 0008-8846
TI  - 3D imaging techniques for characterising microcracks in cement-based materials
T2  - Cement and Concrete Research
UR  - http://dx.doi.org/10.1016/j.cemconres.2020.106309
UR  - http://hdl.handle.net/10044/1/85001
VL  - 140
ER  -
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