| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 257632 | Construction and Building Materials | 2014 | 8 Pages |
•Fractal characterisation and X-ray CT analysis of self-compacting lightweight concrete are carried out.•First study to analyse the segregation of concrete by means of 3D X-ray CT accompanied by image analysis.•Fractal dimension and fracture energy increase with the increase of the complexity of corrosion morphology.•Inherent void distribution is the dominant factor determining strength performance.
In this study, fractal analysis and 3D X-ray computed tomography accompanied by digital image analysis technique are used for the quantitative evaluation of segregation resistance, static strength and corrosion-induced cracking in normal self-compacting concrete and self-compacting lightweight concrete. From image analysis performed on the vertical sections of the specimens, it was observed that self-compacting lightweight concrete had much higher resistance to segregation and the use of coarse lightweight particles in self-compacting concrete did not contribute to extensive level of anisotropy. The results also indicate that self-compacting lightweight concrete was weaker in compression than normal self-compacting concrete mainly due to less homogeneous internal structure. Finally, it was also shown that self-compacting lightweight concrete had lower susceptibility to corrosion in the early stage of exposure to the chloride environment than normal self-compacting concrete and greater fractal energies were dissipated in self-compacting concrete made with less porous and stiffer conventional aggregates.
