Crack patterns of concrete with a single rebar subjected to non-uniform and localized corrosion

Qiao, Di; Nakamura, Hikaru; Yamamoto, Yoshihito; Miura, Taito

doi:10.1016/j.conbuildmat.2016.04.149

Cited by 86 publications

(38 citation statements)

References 22 publications

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“…This estimation is in good agreement with results of experimental works, which concluded that only a few micrometers of loss in rebar radius are needed to induce visible concrete cover cracks, in experimental conditions similar to those modelized in this case [9]. Graph of ox r D in Figure 5 resembles a sinusoidal function of the form (12). Figure 6 shows a linear fit of ox r D versus cos q for four days (when the first cracks appear) and 23 days (test duration).…”

Section: Resultssupporting

confidence: 88%

“…It is worth noting that the proposed dependence (12) with q is equivalent to the dependence used in Reference [13], and, thus, the presented electrochemical model supports the use of this dependence in the cracking model. Graph of ∆r ox in Figure 5 resembles a sinusoidal function of the form (12).…”

Section: Resultssupporting

confidence: 68%

“…This non-uniform corrosion has been observed experimentally [19,20] and has also been modelled [10,11,[13][14][15][16]21]. Usually, geometrical models are used to describe the rebar section and the rebar shape is considered as an ellipsoid [11,14,15,21], a combination of ellipsoids [18], or other geometries [12,13] depending on exposure conditions. This is a convenient simplification for a modelling purpose, but a more realistic model would be desirable.…”

Section: Introductionmentioning

confidence: 88%

“…Usually the appearance of cracking is considered as the limit state regarding the durability of concrete structures affected by steel reinforcement corrosion [6,7]. Thus, great effort on cracking the understanding has been done [8][9][10][11][12][13][14][15][16]. Corrosion products' volume is higher than metal volume, and most of the corrosion products remain as a solid layer around the rebar [2,17].…”

Section: Introductionmentioning

confidence: 99%

“…Cracking is experimentally studied usually by accelerated corrosion tests [9,12,[17][18][19][20]. Additionally, mechanical models have been developed to obtain numerical simulations [8,10,11,[13][14][15][16]21].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Rebar Shape Time-Evolution During a Reinforced Concrete Corrosion Test: An Electrochemical Model

et al. 2019

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An electrochemical model is presented to calculate the rebar shape time-evolution in reinforced mortar specimens during forced corrosion tests. This provides a more realistic description than the usually used geometric models. The current distribution along the rebar perimeter is calculated by using Finite Element Method (FEM) to solve Laplace equation. Then, Faraday's law is used to relate current distribution to rebar volume increase due to corrosion products creation. The shape of the rebar section is obtained as a function of corrosion time.

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Section: Resultssupporting

confidence: 88%

Section: Resultssupporting

confidence: 68%

Section: Introductionmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Rebar Shape Time-Evolution During a Reinforced Concrete Corrosion Test: An Electrochemical Model

et al. 2019

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Stress distribution in thick‐walled cylinder due to non‐uniform radial pressure on the example of reinforcement corrosion in concrete

Abdelatif

Ožbolt²,

Omara

2020

Materials & Corrosion

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This paper presents an analytical solution to the non-uniform pressure on thickwalled cylinder. The formulation is based on the linear elasticity theory (plain strain) and stress function method. As an example, the proposed solution is used to model the stress distribution due to non-uniform steel reinforcement corrosion in concrete. The model is formulated considering different scenarios of corrosion pressure distribution. It is validated against the finite element model for different cases of non-uniform pressure distributions. The results show that the corrosion-induced cracks are likely to start just beyond the anodic zone. This is confirmed by the experimental tests on concrete cylinder exposed to nonuniform accelerated corrosion of steel reinforcement. The model can be effectively used to calculate the distribution of corrosion-induced stresses in concrete.

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Effect of corrosion‐induced crack and corroded rebar shape on bond behavior

Yang

Nakamura

Miura

et al. 2019

Structural Concrete

Self Cite

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This paper aims to investigate the individual effect of corrosion‐induced crack, corroded rebar shape, and rust around rebar on the bond properties of reinforced concrete (RC) members. First, test specimens were corroded by accelerated electric corrosion method with varying corrosion degree ranging from 0 to 25%. Test specimens were divided into different groups. For the normal corrosion group, bond test was conducted directly after the corrosion test to investigate the combined effects including corrosion‐induced crack, corroded rebar shape, and rust on bond deterioration. In another group, after corroded rebar was taken out from test specimen, rust was removed before casted into new concrete to evaluate single effect of corroded rebar shape. Similarly, corroded rebar with rust was casted into new concrete to evaluate the effect of the formation of rust on bond degradation. Experimental results quantitatively illustrate the influential factors including corrosion degree, corrosion crack width and geometry of corroded rebar. As the important finding, corrosion crack in concrete is concluded to be a more dominant factor than the corroded rebar shape and rust accumulation in bond deterioration mechanism. Moreover, rust accumulation contributes to the improvement of bond deterioration induced by corroded rebar shape.

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Crack patterns of concrete with a single rebar subjected to non-uniform and localized corrosion

Cited by 86 publications

References 22 publications

Rebar Shape Time-Evolution During a Reinforced Concrete Corrosion Test: An Electrochemical Model

Rebar Shape Time-Evolution During a Reinforced Concrete Corrosion Test: An Electrochemical Model

Stress distribution in thick‐walled cylinder due to non‐uniform radial pressure on the example of reinforcement corrosion in concrete

Effect of corrosion‐induced crack and corroded rebar shape on bond behavior

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