Chloride-Induced Corrosion of Steel in Cracked OPC and PPC Concretes: Experimental Study

Sangoju, Bhaskar; Gettu, Ravindra; Bharatkumar, B. H.; Neelamegam, M.

doi:10.1061/(asce)mt.1943-5533.0000260

Cited by 35 publications

(23 citation statements)

References 22 publications

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“…Some research indicated that the effect of water-cementitious materials ratio on corrosion is more important than that of crack width (Mohammed et al 2001;Suzuki et al 1990). (NC) was about 1.5-2.0 times of that in PFA concrete (Sangoju et al 2011). Scott and Alexander (2007) reported a 50 % reduction of corrosion rate in high performance concretes (HPCs) by adding GGBS, PFA and SF compared with NCs.…”

Section: Concrete Composition (Water-cementitious Materialsmentioning

confidence: 80%

“…Other bending methods, like cantilever method (Saraswathy and Song 2007;Li 2001) as shown in Fig. 2 and U-shape bending method (Sangoju et al 2011) as shown in Fig. 3, have the same principles as three-point or four-point bending method.…”

Section: Methods Of Inducing Structural Cracksmentioning

confidence: 99%

“…According to one set of findings (Zhang et al 2010;Vidal et al 2007), the effect of cracks on the overall corrosion process is not important, but only for the corrosion initiation process. The other opinion is that the overall process can be seriously affected (Sangoju et al 2011;Otieno et al 2010;Jaffer and Hansson 2008;Poursaee and Hansson 2008;Sahmaran and Yaman 2008;Saraswathy and Song 2007;Scott and Alexander 2007). The other aspect is whether or not there is any relationship between the crack width and the corrosion rate of steel in concrete (Mohammed et al 2001).…”

Section: Introductionmentioning

confidence: 99%

“…The other aspect is whether or not there is any relationship between the crack width and the corrosion rate of steel in concrete (Mohammed et al 2001). Some researchers (Sangoju et al 2011;Otieno et al 2010;Jaffer and Hansson 2008;Poursaee and Hansson 2008;Sahmaran and Yaman 2008;Saraswathy and Song 2007;Scott and Alexander 2007) found that a wider crack width resulted in greater corrosion rate, while others (Zhang et al 2010;Vidal et al 2007;Beeby 1983) got little relationship between the crack width and the corrosion rate.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Influence of Cracking Caused by Structural Loading on Chloride-Induced Corrosion Process in Reinforced Concrete Elements: A Review

Wang

Basheer

Bai

2014

Durability of Reinforced Concrete From Composition to Protection

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The chloride-induced corrosion of steel is a serious problem affecting the durability of reinforced concrete structures. Cracks may facilitate the ingress of chlorides into concrete and thus accelerate the corrosion process. However, different opinions on the effect of cracks on corrosion of steel were found in the literature. Two aspects existed among researchers: one is whether cracks accelerate only the corrosion initiation process or the overall corrosion process. The other aspect is whether or not there is a relationship between the crack width and the corrosion rate. In order to answer these contradictory aspects, finds from the literature were summarised. All the factors that could influence the corrosion process of steel in cracked concrete, such as crack inducing methods, corrosion acceleration methods, crack width, crack orientation, crack propagation status, concrete cover depth and concrete composition (water-cementitious materials ratio and mineral additives), were analysed based on the findings from the literature. A summary of current knowledge and conclusions about the aspects was then presented.

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Section: Concrete Composition (Water-cementitious Materialsmentioning

confidence: 80%

Section: Methods Of Inducing Structural Cracksmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of Cracking Caused by Structural Loading on Chloride-Induced Corrosion Process in Reinforced Concrete Elements: A Review

Wang

Basheer

Bai

2014

Durability of Reinforced Concrete From Composition to Protection

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“…However, most of them investigated the corrosion of steel in 'lab concrete', which was uncracked and not subjected to any structural loads (Bamforth, 2004;Violetta, 2002;Thomas & Bentz, 2001;Siemes & Edvardsen, 1999). Although a small proportion of them dealt with chloride induced corrosion in cracked concretes, the influence of cracks wider than 0.07 mm, or even sometimes wider than 0.7 mm, termed commonly as macro-cracks, was investigated (Sangoju et al, 2011;Otieno et al, 2008& 2010, Sahmaran, 2007Rodriguez & Hooton, 2003;Mohammed et al, 2001;Schiessl & Raupach, 1997). In fact, the maximum crack width allowed in designing reinforced concrete is 0.3 mm in chloride-laden environment according to BS EN 1992-1-1:2004(British Standards Institution, 2011a.…”

Section: Introductionmentioning

confidence: 99%

Influence of Micro and Macro Cracks Due to Sustained Loading on Chloride-Induced Corrosion of Reinforced Concrete Beams

Wang

Nanukuttan

Bai³

2014

Proceedings of the 4th International Conference on the Durability of Concrete Structures

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Chloride-induced corrosion of steel is one of the most commonly found problems affecting the durability of reinforced concrete structures in both marine environment and where de-icing salt is used in winter. As the significance of micro-cracks on chloride induced corrosion is not well documented, 24 reinforced concrete beams (4 different mixes -one containing Portland cement and another containing 35% ground granulated blastfurnace slag at 0.45 and 0.65 water-binder ratios) were subjected to three levels of sustained lateral loading (0%, 50% and 100% of the load that can induce 0.1 mm wide cracks on the tension surface of beam-F 0.1 ) in this work. The beams were then subjected to weekly cycles of wetting with 10% NaCl solution for 1 day followed by 6 days of drying at 20 (±1) 0 C up to an exposure period of 60 weeks. The progress of corrosion of steel was monitored using half-cell potential apparatus and linear polarisation resistance (LPR) test. These results have shown that macro-cracks (at load F 0.1 ) and micro-cracks (at 50% of F 0.1 ) greatly accelerated both the initiation and propagation stages of the corrosion of steel in the concrete beams. Lager crack widths for the F 0.1 load cases caused higher corrosion rates initially, but after about 38 weeks of exposure, there was a decrease in the rate of corrosion. However, such trends could not be found in 50% F 0.1 group of beams. The extent of chloride ingress also was influenced by the load level. These findings suggest that the effect of micro-cracking at lower loads are very important for deciding the service life of reinforced concrete structures in chloride exposure environments.

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A review on the effects of cracking and crack width on corrosion of reinforcement in concrete

Kanavaris,

Coelho,

Ferreira

et al. 2023

Structural Concrete

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It is widely known that corrosion is one of the main problems that reinforced concrete structures may endure during their life‐cycle. This problem is usually tackled in a prescriptive manner, by limiting the crack width allowed to occur during structures' service life. In an attempt to better understand the effect that cracking and crack width can have on the corrosion process, as well as systematize the existing work in the field, this paper presents a summary of an in‐depth literature review on the topic of reinforcement corrosion in concrete. The main focus is devoted to chloride‐induced corrosion since that is the most widely studied corrosion mechanism, even though carbonation‐induced corrosion is also relatively briefly discussed. The paper also presents an overview of the existing guidelines that have been used in the past to analyze and support decision‐making regarding corrosion in reinforced concrete structures.

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Chloride-Induced Corrosion of Steel in Cracked OPC and PPC Concretes: Experimental Study

Cited by 35 publications

References 22 publications

Influence of Cracking Caused by Structural Loading on Chloride-Induced Corrosion Process in Reinforced Concrete Elements: A Review

Influence of Cracking Caused by Structural Loading on Chloride-Induced Corrosion Process in Reinforced Concrete Elements: A Review

Influence of Micro and Macro Cracks Due to Sustained Loading on Chloride-Induced Corrosion of Reinforced Concrete Beams

A review on the effects of cracking and crack width on corrosion of reinforcement in concrete

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