Korrosionsbedingte Kosten an Ingenieurbauwerken im Schweizer Straßennetz

Yılmaz, Deniz; Angst, Ueli

doi:10.1002/best.202000004

Cited by 22 publications

(7 citation statements)

References 11 publications

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“…Steel corrosion is the most common cause of premature deterioration of reinforced concrete structures. Given the substantial economic impact associated with this durability problem [1,2], numerical modelling of reinforcement corrosion has received increasing levels of attention in recent years [3][4][5][6][7][8]. However, predicting the durability of reinforced concrete structures exposed to corrosive conditions remains to be a considerable challenge [9].…”

Section: Introductionmentioning

confidence: 99%

Solubility and speciation of iron in cementitious systems

Furcas

Lothenbach

Isgor

et al. 2022

Cement and Concrete Research

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Aqueous iron hydrolysis products and chloride complexes influence steel corrosion kinetics and dictate the amount and type of corrosion products formed. Here, we compile a thermodynamic database devoted to aqueous iron species and solid oxides as well as chloride complexes, aiming to describe their speciation and solubility within the prevailing chemical environment of interest for cementitious systems. We compare thermodynamic calculations to empirical data on the elemental composition of pore solutions from cementitious systems.It is found that dissolved iron concentrations in cement pore solutions can differ considerably from thermodynamic predictions. In particular, measured Fe(II) concentrations can exceed the thermodynamic limit by 2-5 orders of magnitude. Additionally, experimentally obtained iron solubility in the presence of chloride exceed thermodynamic predictions. We discuss that these differences may be explained by so far unknown iron complexes, stabilisation of intermediate phases such as chloride green rust, or due to (kinetic) hindrance of precipitation.

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Section: Introductionmentioning

confidence: 99%

Solubility and speciation of iron in cementitious systems

Furcas

Lothenbach

Isgor

et al. 2022

Cement and Concrete Research

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“…A longer service life is anticipated due to the corrosion resistance of FRPs, which also lowers future maintenance costs. Corrosion-related damages are the main cost drivers for steel-reinforced concrete infrastructure [22][23][24][25]. Hence, the avoidance of corrosion could justify higher initial costs.…”

Section: Introductionmentioning

confidence: 99%

Parametric Design Studies of Mass-Related Global Warming Potential and Construction Costs of FRP-Reinforced Concrete Infrastructure

et al. 2022

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Fibre-reinforced polymers (FRPs) are a promising corrosion-resistant alternative to steel reinforcement. FRPs are, however, generally costly and have a high energy demand during production. The question arises whether the high performance of FRPs and possible savings in concrete mass can counterbalance initial costs and environmental impact. In this paper, a parametric design study that considers a broad range of concrete infrastructure, namely a rail platform barrier, a retaining wall and a bridge, is conducted to assess the mass-related global warming potential and material costs. Design equations are parametrised to derive optimum reinforced concrete cross-sectional designs that fulfil the stated requirements for the serviceability limit state and ultimate limit state. Conventional steel reinforcement, glass and carbon FRP reinforcement options are evaluated. It is observed that the cross-sectional design has a significant influence on the environmental impact and cost, with local extrema for both categories determinable when the respective values become a minimum. When comparing the cradle-to-gate impact of the different materials, the fibre-reinforced polymer-reinforced structures are found to provide roughly equivalent or, in some cases, slightly more sustainable solutions than steel-reinforced structures in terms of the global warming potential, but the material costs are higher. In general, the size of the structure determines the cost competitiveness and sustainability of the FRP-reinforced concrete options with the rail platform barrier application showing the greatest potential.

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“…Chloride-induced corrosion of reinforcement in concrete is known to be the most frequent deterioration mechanism for infrastructure objects (British Cement Association, 1997;fib -task group 5.8, 2011) and causes therefore high costs (Koch, 2017(Koch, , 2002Yilmaz & Angst, 2020). Typically, condition assessment of existing engineering structures includes measuring chloride profiles and comparing the results with the so-called critical chloride content C crit , which is given in standards and textbooks (fib, 2006;SIA, 2011).…”

Section: Introductionmentioning

confidence: 99%

Investigations of accelerated methods for determination of chloride threshold values for reinforcement corrosion in concrete

Käthler

Sørensen

Angst

2021

Sustainable and Resilient Infrastructure

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Testing the critical chloride content (C crit ) in laboratory samples or in samples retrieved from structures enhances the understanding of rebar corrosion initiation in concrete and can result in a significant improvement of predicting the residual service life of ageing structures. A possible drawback of test methods for C crit is that they can be time-consuming. In this work, different accelerated methods for C crit testing are studied and compared. It is found that the acceleration method influences the test results. The results are discussed with respect to evaluation of existing structures and service life modelling.

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Korrosionsbedingte Kosten an Ingenieurbauwerken im Schweizer Straßennetz

Cited by 22 publications

References 11 publications

Solubility and speciation of iron in cementitious systems

Solubility and speciation of iron in cementitious systems

Parametric Design Studies of Mass-Related Global Warming Potential and Construction Costs of FRP-Reinforced Concrete Infrastructure

Investigations of accelerated methods for determination of chloride threshold values for reinforcement corrosion in concrete

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