Experimental and numerical study of accelerated corrosion of steel reinforcement in concrete: Transport of corrosion products

Sola, Emiliano; Ožbolt, Joško; Balabanić, Gojko; Mir, Zahid

doi:10.1016/j.cemconres.2019.03.018

Cited by 62 publications

(28 citation statements)

References 23 publications

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“…As corrosion progresses, rust products are generated as a result of corrosion reactions. Rust products are more expansive than parent steel [41] and their accumulation at the steel-concrete interface generates considerable internal pressure leading to micro-cracking of concrete [42,43]. As time progresses, microcracks coalesce to form visible macro-cracks which eventually can lead to the deterioration of structural elements [44].…”

Section: Chloride Induced Steel Corrosion In Concretementioning

confidence: 99%

Recent Advances on the Application of Layered Double Hydroxides in Concrete—A Review

et al. 2020

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The issue of chloride induced corrosion of reinforced concrete is a serious problem affecting infrastructure globally and causing huge economic losses. As such this issue has gained a considerable attention in the scientific community in the recent past. Layered Double Hydroxides (LDHs) have recently emerged as a new class of concrete-additives with a potential to increase the chloride resistance of concrete and mitigate corrosion. LDHs are clay like structures consisting of positively charged layers of cations with associated hydroxides and exchangeable anions in between the layers. Due to this charge balanced structure, LDHs possess the property of encapsulating an anion from the environment and replacing it with an exchangeable anion present in its layers. Potential applications include chloride entrapment in concrete and delivery of corrosion inhibiting anions. However, many versatile compositions of LDHs can be easily synthesized and their application as cement additives reach far beyond corrosion mitigation in concrete. This review presents a summary of recent advances on the applications of LDH in concrete. An extensive set of recently published literature has been critically reviewed and trends have been identified.

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Section: Chloride Induced Steel Corrosion In Concretementioning

confidence: 99%

Recent Advances on the Application of Layered Double Hydroxides in Concrete—A Review

et al. 2020

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“…(13) does not directly describe the transport of the red rust, but rather the distribution of the rust formed in the concrete pores and cracks as a consequence of soluble species, which can dissolve in concrete pore solution and subsequently migrate in pores and cracks, reacting with oxygen in the pore water [8]. Detailed experimental and numerical investigations have been carried out recently in order to calibrate the present model with this respect [6]. The microplane model for concrete with relaxed kinematic constraints [5] is applied in the mechanical part of the model.…”

Section: Chemo-hygro-thermo-mechanical Model For Concretementioning

confidence: 99%

“…This model was developed at the Institute of Construction Materials, University of Stuttgart, and implemented into the 3D FE code [3][4] [5]. Over the past years, the model has been calibrated, verified and further improved based on the extensive experimental tests [6]. In the following its theoretical background and application is presented.…”

Section: Introductionmentioning

confidence: 99%

Modelling corrosion of steel in concrete. Past, present and future

Ožbolt¹,

Balabanić²,

Oršanić³

2019

Numerički Postupci. Zbornik Radova Mini - Simpozija

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In the first part of the presentation an overview of different models for modelling chloride induced corrosion of reinforcement in concrete developed in the past will be shortly presented. Subsequently, coupled 3D chemo-hygro-thermo-mechanical model for concrete will be presented. The model is aimed to simulate complex non-mechanical and mechanical processes before and after depassivation of steel reinforcement. It was implemented into a 3D FE code and its application and performance will be illustrated through several numerical examples for natural and accelerated corrosion.

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“…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]. Thus, corrosion implies a rebar volume increase that causes concrete cracking [2].…”

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%

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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Experimental and numerical study of accelerated corrosion of steel reinforcement in concrete: Transport of corrosion products

Cited by 62 publications

References 23 publications

Recent Advances on the Application of Layered Double Hydroxides in Concrete—A Review

Recent Advances on the Application of Layered Double Hydroxides in Concrete—A Review

Modelling corrosion of steel in concrete. Past, present and future

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

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