Modelling corrosion propagation in reinforced concrete structures – A critical review

Otieno, Mike; Beushausen, H.; Alexander, Mark

doi:10.1016/j.cemconcomp.2010.11.002

Cited by 96 publications

(44 citation statements)

References 29 publications

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“…The state-of-the-art does, however, not permit reliable performance prognoses of these materials in their actual exposure environments, which clearly handicaps holistic sustainability and life cycle assessments. The poor predictive power [16,[18][19][20][21][22] of current models and accelerated testing can be traced to insufficient theoretical grounds (see Sect. 3).…”

Section: Technological Challengesmentioning

confidence: 99%

Challenges and opportunities in corrosion of steel in concrete

2018

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This paper summarizes the grand societal, economic, technological, and educational challenges related to corrosion of steel in concrete, and presents the state-of-the-art of the most relevant issues in the field. The enormous financial impact of infrastructure corrosion seems to be inadequately balanced by educational and research activities. This presents a unique opportunity in many countries for maintaining or improving their competitiveness, given the major technological challenges can be solved. The main technological challenges are (1) the ever-increasing need to cost-effectively maintain existing, ageing reinforced concrete structures, and (2) designing durable, thus sustainable new structures. The first challenge arises mainly in industrialized countries, where there is a need to abandon conservative, experience-based decision taking and instead move to innovative, knowledge-based strategies. The second challenge regards mainly emerging countries expanding their infrastructures and where thus a major beneficial environmental impact can still be made by providing long-lasting solutions. This means to be able to reliably predict the longterm corrosion performance of reinforced concrete structures in their actual environments, particularly for modern materials and in the absence of long-term experience. During the second half of the last century, civil engineers, materials scientists, and chemists have in many countries made considerable attempts towards understanding corrosion of steel in concrete, but many of the approaches got bogged down in empiricism. From reviewing the state-ofthe-art one can conclude that transport modeling in concrete is relatively well-advanced, at least in comparison with understanding corrosion initiation and corrosion propagation, where many questions are still open. This presents a number of opportunities in scientific research and technological development that are discussed in this paper.

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Section: Technological Challengesmentioning

confidence: 99%

Challenges and opportunities in corrosion of steel in concrete

2018

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“…Therefore, the effect of cracking should be taken into account for more accurate service-life prediction of RC structures. Now, almost none of the available service-life prediction models take the influence of load-induced cracking on corrosion into consideration (Otieno et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Rebar corrosion in cracked RC prisms located in harsh marine environment

Ahmadi¹,

Ramezanianpour²,

Sobhani³

2014

Magazine of Concrete Research

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The aim of this paper is to evaluate the corrosion activity of cracked flexural reinforced concrete elements in a marine environment. Some non-destructive test results of a comprehensive research project are presented and discussed.Corrosion activity of 24 cracked reinforced concrete prisms under sustained loading and 12 uncracked reinforced concrete prisms are assessed using three non-destructive testing methods. The specimens are located in the tidal zone of a field exposure station on the south coast of Iran. The results obtained during 14 months of exposure are presented and discussed in this study. It is found that the corrosion of rebar in the cracked zone initiates shortly after exposure to sea water and declines over the exposure period. Also, the corrosion of steel reinforcement in the cracked zone becomes more severe by increasing crack width/cover ratio. Furthermore, the corrosion current density and electrical resistivity results are more sensitive to the distance between testing point and crack point compared to the half-cell potential results.

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“…A validação de grande parte dos modelos de previsão é limitada, pois tais modelos foram desenvolvidos com uma série de restrições ou condições próprias do modelo. Assim, é necessário cuidado ao escolher um determinado modelo, sendo necessário explicitar aos futuros usuários ou leitores das condições e restrições adotadas (OTIENO et al, 2010).…”

Section: Introductionunclassified

“…Modelos de previsão devem levar em conta os efeitos de carga, fissuração provocada pelos produtos da corrosão e a variabilidade tanto do concreto enquanto material, como da corrosão enquanto processo (OTIENO et al, 2010).…”

Section: Introductionunclassified

“…A maioria dos modelos usualmente desenvolvidos são baseados em elementos de concreto armado isolados que, em geral, são vigas. É importante destacar que a resposta de um elemento isolado de concreto armado pode não ser a mesma que aquela de um elemento quando considerado em conjunto com a estrutura de concreto armado como um todo, o que inclusive justifica a análise de sistemas estruturais (OTIENO et al, 2010).…”

Section: Introductionunclassified

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Análise mecânica e probabilística da corrosão de armaduras de estruturas de concreto armado submetidas à penetração de cloretos

Pellizzer¹

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Agradeço primeiramente a Deus, princípio e fim de todas as coisas. A toda a minha família e em especial aos meus pais Gabriella e Lino por sempre me incentivarem nos estudos e por todo o amor incondicional doado. Mãe, pai, para mim vocês são preciosos exemplos de dedicação e altruísmo sincero. A Sonia, amada companheira de caminhada pelas estradas da vida. Longe ou perto, todo o amor, cumplicidade, paciência e apoio a mim dedicados foram fundamentais para eu chegar até aqui. Obrigado. Ao professor e orientador Edson D. Leonel, que com a sua tranquilidade e serenidade forneceu bases sólidas onde pude me apoiar sempre que precisei. Agradeço pela disponibilidade constante, atenção, paciência e confiança depositada em mim. Ao professor André T. Beck pelo incentivo e suporte prestado no aprendizado da teoria de confiabilidade. Em meio a um universo de incertezas, sua expressiva influência na minha formação acadêmica eu considero como certa. Ao professor Caio G. Nogueira, pela grande ajuda na implementação computacional e pelas preciosas sugestões ao longo do desenvolvimento do trabalho. Ao professor Andrés B. Cheung, exemplo de humildade e dedicação, pela amizade, pelas conversas e pelo incentivo, sem os quais provavelmente eu não teria escolhido cursar o mestrado. Obrigado por ter me ajudado a escolher esse caminho que indubitavelmente expandiu meus horizontes.

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Modelling corrosion propagation in reinforced concrete structures – A critical review

Cited by 96 publications

References 29 publications

Challenges and opportunities in corrosion of steel in concrete

Challenges and opportunities in corrosion of steel in concrete

Rebar corrosion in cracked RC prisms located in harsh marine environment

Análise mecânica e probabilística da corrosão de armaduras de estruturas de concreto armado submetidas à penetração de cloretos

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