Experimental investigation of the relation between damage at the concrete-steel interface and initiation of reinforcement corrosion in plain and fibre reinforced concrete

Michel, Alexander; Solgaard, Anders Ole Stubbe; Pease, Bradley Justin; Geiker, Mette Rica; Stang, Henrik; Olesen, John Forbes

doi:10.1016/j.corsci.2013.08.019

Cited by 89 publications

(50 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Similar behaviour was observed by Michel et al (2013) in their study. In cases where cracks develop horizontally (parallel to the reinforcement), the ingress profiles change accordingly.…”

Section: Libssupporting

confidence: 77%

Chloride ingress in cracked concrete: a laser induced breakdown spectroscopy (LIBS) study

Šavija

Schlangen

Farias

et al. 2014

ACT

View full text Add to dashboard Cite

Cracks are always present in reinforced concrete structures. In the presented research, influence of mechanical cracks on chloride ingress is studied. A compact reinforced concrete specimen was designed, mimicking the cracking behaviour of beam elements. Cracks of different widths were induced by means of mechanical loading. These cracked specimens were then subjected to weekly cycles of wetting and drying with NaCl solution. After the exposure, the specimens were cut, and chloride distributions were determined using Laser Induced Breakdown Spectroscopy (LIBS), an innovative technique which enables simultaneous determination of different elements with high spatial resolution and minimal specimen preparation. By combining element distributions of different elements, it is possible to discriminate between coarse aggregate particles, and the mortar matrix. It was found that the wider the crack is, the higher the ingress of chloride ions. This was, however, different for two tested concrete mixes. Due to highly inhomogeneous chloride distribution around the cracks, use of fine-scale experimental techniques for chloride mapping is advised, based on the presented study.

show abstract

“…Similar behaviour was observed by Michel et al (2013) in their study. In cases where cracks develop horizontally (parallel to the reinforcement), the ingress profiles change accordingly.…”

Section: Libssupporting

confidence: 77%

Chloride ingress in cracked concrete: a laser induced breakdown spectroscopy (LIBS) study

Šavija

Schlangen

Farias

et al. 2014

ACT

View full text Add to dashboard Cite

show abstract

“…Most of the available research investigating the relation between crack width and corrosion is, however, based on cracks measured at the surface, which are greatly dependent on the cover depth. On the other hand, it has been hypothesised by some authors [8,9,10,11,12] that the crack width at the reinforcement level together with the associated neighbouring areas of the steel-concrete interface affected by bond stresses, i.e. the debonded length along which the slip and separation occur, might govern the extension of the anodes formed on the rebar and might consequently be a better indicator of the risk of reinforcement corrosion.…”

Section: Introductionmentioning

confidence: 99%

Characterisation of bending cracks in R/FRC using image analysis

Berrocal

Löfgren

Görander

et al. 2016

Cement and Concrete Research

View full text Add to dashboard Cite

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.

show abstract

“…To name a few prominent examples, pores, voids, and cracks have been observed to strongly influence initiation of chloride-induced corrosion under some conditions [3][4][5][6][7][8][9][10], but seem to have no influence under other conditions [9,11]. There are many other characteristics at the SCI that may, or may not, occur locally and that may potentially influence the local susceptibility of the reinforcement to corrosion initiation.…”

Section: Introductionmentioning

confidence: 99%

The steel–concrete interface

et al. 2017

View full text Add to dashboard Cite

Although the steel-concrete interface (SCI) is widely recognized to influence the durability of reinforced concrete, a systematic overview and detailed documentation of the various aspects of the SCI are lacking. In this paper, we compiled a comprehensive list of possible local characteristics at the SCI and reviewed available information regarding their properties as well as their occurrence in engineering structures and in the laboratory. Given the complexity of the SCI, we suggested a systematic approach to describe it in terms of local characteristics and their physical and chemical properties. It was found that the SCI exhibits significant spatial inhomogeneity along and around as well as perpendicular to the reinforcing steel. The SCI can differ strongly between different engineering structures and also between different members within a structure; particular differences are expected between structures built before and after the 1970/1980s. A single SCI representing all on-site conditions does not exist. Additionally, SCIs in common laboratory-made specimens exhibit significant differences compared to engineering structures. Thus, results from laboratory studies and from practical experience should be applied to engineering structures with caution. Finally, recommendations for further research are made. This report was prepared by the working group within RILEM TC 262-SCI, and further reviewed and approved by all members of the RILEM TC 262-SCI.

show abstract

Experimental investigation of the relation between damage at the concrete-steel interface and initiation of reinforcement corrosion in plain and fibre reinforced concrete

Cited by 89 publications

References 30 publications

Chloride ingress in cracked concrete: a laser induced breakdown spectroscopy (LIBS) study

Chloride ingress in cracked concrete: a laser induced breakdown spectroscopy (LIBS) study

Characterisation of bending cracks in R/FRC using image analysis

The steel–concrete interface

Contact Info

Product

Resources

About