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Characterisation of bending cracks in R/FRC using image analysis

Carlos Gil Berrocal (Institutionen för bygg- och miljöteknik, Konstruktionsteknik) ; Ingemar Löfgren (Institutionen för bygg- och miljöteknik, Konstruktionsteknik ; Extern) ; Karin Lundgren (Institutionen för bygg- och miljöteknik, Konstruktionsteknik) ; Niclas Görander (Institutionen för bygg- och miljöteknik, Konstruktionsteknik) ; Christopher Halldén (Institutionen för bygg- och miljöteknik, Konstruktionsteknik)
Cement and Concrete Research (0008-8846). Vol. 90 (2016), p. 104-116.
[Artikel, refereegranskad vetenskaplig]

In this study, experiments were conducted to induce bending cracks of specific surface crack width to reinforced concrete beams made of plain concrete (RC) and reinforced concrete beams made of fibre reinforced concrete (R/FRC). After injecting and impregnating the cracks with dyed epoxy resin, image processing and analysis were employed to investigate the internal crack morphology. Several crack features including crack width (accumulated, effective and maximum), branching and tortuosity were defined and quantified. The results showed that in addition to arrested crack development, the presence of fibres yielded a distinctive change in the internal crack pattern, including increased branching and tortuosity, both of which have positive implications regarding concrete permeation. Likewise, specimens with fibres exhibited reduced maximum individual crack widths near the rebar, potentially increasing the ability of autogenous crack healing and reducing the risk of corrosion initiation.

Nyckelord: Crack detection, Image analysis, Durability, Fibre reinforcement



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Denna post skapades 2016-11-14. Senast ändrad 2016-12-09.
CPL Pubid: 245101

 

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