Probabilistic Assessment of Concrete Structure Durability under Reinforcement Corrosion Attack

Vořechovská, Dita; Teplý, Břetislav; Chromá, Markéta

doi:10.1061/(asce)cf.1943-5509.0000130

Cited by 32 publications

(9 citation statements)

References 21 publications

(20 reference statements)

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“…This effect will be analyzed, firstly, by the pore refinement induced by the mineral additions, through the investigation of the evolution in time of the electrical resistivity of concrete specimens cured under‐water. Then, the effects on the resistance to carbonation and the penetration of chloride ions will be investigated by considering the parameters normally used for the performance‐based design of reinforced concrete structures, that is, the carbonation coefficient K and the apparent diffusion coefficient D app .…”

Section: Resultsmentioning

confidence: 99%

Improving durability of reinforced concrete structures by recycling wet‐ground MSWI bottom ash

Carsana

Gastaldi

Lollini

et al. 2016

Materials & Corrosion

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Municipal solid waste incineration (MSWI) generates high amounts of bottom ash that, after grinding, could be used as mineral addition for concrete. Wet grinding of the bottom ash can prevent the risk of deleterious expansion due to hydrogen evolution, associated to the presence of metallic aluminium. The pozzolanic behavior of the bottom ash may improve concrete resistance to the penetration of aggressive species. Advantages of recycling wet-ground MSWI bottom ashes may even be higher when self-compacting concrete (SCC) is used, which requires large quantity of fine powders (usually more than 500 kg/m 3 ) to prevent segregation of the fresh mix. This paper describes the results of a research aimed at investigating the use of wet-ground MSWI bottom ashes as mineral additions for the production of self-compacting concrete. Several types of mineral additions (MSWI bottom ash, coal fly ash, and ground limestone) were used in replacement of 15, 30, and 45% of Portland cement. The results showed that the MSWI ash, added to the mix as a fine slurry obtained by wet-grinding, led to the production of SCC concrete with compressive strength and resistance to chloride and carbonation similar, or even better, than those of concrete with same amount of coal fly ash.

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Section: Resultsmentioning

confidence: 99%

Improving durability of reinforced concrete structures by recycling wet‐ground MSWI bottom ash

Carsana

Gastaldi

Lollini

et al. 2016

Materials & Corrosion

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“…Models for carbonation , chloride ingress , reinforcement corrosion as well as for acid and frost attack are provided. Recently, some new issues have been studied and integrated into FReET‐D, namely models for deterioration due to biogenic sulfuric acid and models for synergy of concrete carbonation or chloride and mechanical load effects .…”

Section: Degradation Modelingmentioning

confidence: 99%

“…The Models for carbonation [22], chloride ingress [17,23,24], reinforcement corrosion [25] as well as for acid and frost attack are provided.…”

Section: Degradation Modelingmentioning

confidence: 99%

Safety analysis and reliability assessment of engineering structures – The success story of SARA

et al. 2019

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The concept for the safety assessment of concrete structures integrating nonlinear finite element analysis with stochastic and reliability technology into an advanced engineering tool is presented. The basic aim of the stochastic nonlinear analysis is to calculate the safety index (and failure probability) of an existing engineering structure, which characterizes its reliability. The nonlinear solution enables a realistic estimation of the structural response statistics to be obtained (failure load, deflections, cracks, stresses, etc.). The development of possibility of randomization for such computationally intensive problems was part of the project Safety Analysis and Reliability Assessment of Engineering Structures (SARA). Latin hypercube sampling has been used in SARA in order to keep the number of required simulations at an acceptable level. Statistical correlation, which is important for a realistic solution, was also imposed in SARA by using a stochastic optimization technique called simulated annealing. The sensitivity of results to random input parameters can be evaluated using nonparametric rank‐order correlation coefficients. The presented project SARA focusing on the safety assessment of engineering structures supersedes the usual methods based on simplified formulas. SARA supports a higher level of decision‐making process in bridge administration and maintenance of transport macrostructure. The object of this article is to present the diverse developments of the project SARA and to honor Professor Konrad Bergmeister, who was the frontrunner and chair of SARA and was mainly responsible for the SARA project initiation and its fruitful and amazing developments.

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“…The acceptable probability should be selected on the basis of the severity of the adverse event occurring (limit state), although this task is not simple. Design equations, correction parameters, and limitations of the model can be found in the literature (Ferreira, 2012;Fib, 2006;Lollini, Redaelli, & Bertolini, 2012;Marques, Costa, & Lanata, 2012;Vorěchovská, Teplý, & Chromá, 2010). To show the possible use of these performance-based model, Figure 8 shows an example of calculation of the probability of failure for the splash zone of a marine structure for which a design service life of 100 years is required.…”

Section: Prevention Provided By the Concrete Covermentioning

confidence: 99%

Corrosion of Steel in Concrete and Its Prevention in Aggressive Chloride-Bearing Environments

Bertolini¹,

Carsana²,

Gastaldi³

et al. 2016

Proceedings of the 5th International Conference on the Durability of Concrete Structures

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This keynote paper deals with the durability of reinforced concrete (RC) structures exposed to aggressive environments characterized by high concentration of chloride ions, namely, marine environments or the use of de-icing salts. The mechanism of chloride-induced corrosion of steel in concrete is introduced, and its influence on the service life of RC structures is analyzed. Factors affecting the time to corrosion initiation are described with regard to both concrete properties and environmental exposure conditions. Design approaches available for achieving durability targets associated with the design service life are analyzed, focusing on studies carried out by the authors in recent years at the mCD Concrete Durability lab of Politecnico di Milano, which were aimed at improving the protection provided to the steel bars by the concrete cover, investigating the advantages of using corrosion-resistant stainless steel bars and developing the electrochemical technique of cathodic prevention.

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Probabilistic Assessment of Concrete Structure Durability under Reinforcement Corrosion Attack

Cited by 32 publications

References 21 publications

Improving durability of reinforced concrete structures by recycling wet‐ground MSWI bottom ash

Improving durability of reinforced concrete structures by recycling wet‐ground MSWI bottom ash

Safety analysis and reliability assessment of engineering structures – The success story of SARA

Corrosion of Steel in Concrete and Its Prevention in Aggressive Chloride-Bearing Environments

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