Residual Life of Corroding Reinforced Concrete Structures in Marine Environment

Torres-Acosta, A. A.; Madrid, M Martinez

doi:10.1061/(asce)0899-1561(2003)15:4(344)

Cited by 121 publications

(86 citation statements)

References 12 publications

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“…For this purpose, codes and standard specifications denote some limit states based on the past engineering experiences. There are some stage gates of limit state; as the initiation of corrosion (Maage et al 1996); as the first cracking of cover concrete (Liu and Weyers 1998;Torres-Acosta and Martinez-Madrid 2003); based on a certain limit of crack width Stewart 2001). While each of these definitions has their own rational, end outcomes in terms of maintenance cost may significantly vary.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Gel Migration in Cracked Concrete and Broken Symmetry of Corrosion Profiles

Gebreyouhannes

Maekawa

2016

ACT

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The initiation and subsequent propagation of corrosion-induced cracks is simulated by multi-phase mechanics where the coupled corrosion gel migration and crack-based fracture can be coherently taken into consideration. A key focus is given to the nature of corrosion products and their dependency on the corrosion rate and the anisotropic stiffness and permeability caused by cracking. Migration of corrosion gel to both micro-pores of cementitious composites and crack gaps are explicitly considered under the gradient of gel pressure, which is newly defined on the corrosion gel phase. The effects of cover depth, corrosion rate and the mix-proportion of concrete on the crack initiation and propagation are discussed with experimental facts. The broken symmetry of corrosion profile around reinforcing bars is successfully simulated as a nature even though the geometry of analysis domains would be in perfect symmetry. This scheme which allows kinematics of produced gel is indispensable for a versatile framework of durability mechanics.

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Section: Introductionmentioning

confidence: 99%

Nonlinear Gel Migration in Cracked Concrete and Broken Symmetry of Corrosion Profiles

Gebreyouhannes

Maekawa

2016

ACT

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“…1). Figure 4 shows a SEM cross-section micrograph of a 5 mm diameter steel rebar embedded in the concrete belonging to building Alicante-II, depicting an irregular rust layer with a thickness of 220-300 μm, showing banded solid phases and alveolus textures, probably suggesting a seasonal discontinuous deterioration, see the regions of main components of rust layers (Suda et al, 1993;Torres-Acosta and Martínez-Madrid, 2003). Table 2 displays the chemical composition (%) obtained by XRF analysis of the samples from Alicante-I, Alicante-II, Alicante-III and Barcelona.…”

Section: Methodsmentioning

confidence: 99%

“…Some models discuss the time needed to generate cracking of the concrete as a function of the concrete characteristics, its physical properties and the accumulation of corrosion products (Liu and Weyers, 1998;Pantazopoulou and Papoulia, 2001), or assume good adherence behaviour at the steel/concrete interface to obtain an expansion threshold below which no crack propagation occurs (Leung, 2001). Other authors have modelled the critical corrosion penetration to initiate cracking and its relation with the reinforcement diameter (Andrade et al, 1993;Torres-Acosta and Martínez-Madrid, 2003;Muñoz et al, 2007;TorresAcosta and Castro-Borges, 2013), or the reduction in the steel section due to corrosion considering the concrete cover/rebar diameter relation and the characteristics of the concrete (Vidal et al, 2004;Bossio et al, 2015;Fahy et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Predicción de la vida útil en servicio de edificios de 50 años expuestos a ambientes marinos

et al. 2018

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Steel reinforcing bars are often coated with rusts formed during service in reinforced concrete (RC) structures. Rust layers growing on steel rebars induce expansive stresses and cause cracking on cover concrete. This study uses steel corrosion rate results measured on reinforced concrete buildings of more than 50 years of age located in marine environments and considers the pressure generated by the volume expansion of corrosion product layers to calculate the service life of the RC structures using a numerical simulation, estimating the time to corrosion cracking of the concrete cover. Akaganeite, goethite, lepidocrocite, hematite, magnetite and maghemite were identified by X-ray diffraction as crystalline phase constituents of the rust layers. RESUMEN: Predicción de la vida útil en servicio de edificios de 50 años expuestos a ambientes marinos.Los refuerzos corrugados de acero embebidos en hormigón, presentan con frecuencia una capa de herrumbre formada durante la vida en servicio de las estructuras de hormigón armado (EHA). Las capas de óxido, productos de corrosión, que crecen en los refuerzos de acero inducen tensiones expansivas y causan el agrietamiento del recubrimiento de hormigón. El presente estudio utiliza los resultados de la velocidad de corrosión del acero corrugado, medidos en edificios de más de 50 años, construidos con hormigón armado, ubicados en ambientes marinos. El estudio considera la presión generada por la expansión de volumen de las capas de productos de corrosión para calcular la vida útil en servicio de las EHA utilizando una simulación numérica, estimando el tiempo hasta la fisuración por corrosión del recubrimiento de hormigón. Akaganeita, goethita, lepidocrocita, hematita, magnetita y maghemita fueron identificadas por difracción de rayos X, como constituyentes de las fases cristalinas de las capas de óxido.

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“…Recent studies on safety and structural reliability of corroding reinforced concrete beams, assume general (uniform) corrosion and generally, simplified assumptions are made for pitting corrosion which ignore the spatial variability associated with pitting along the reinforcing bar (Mori and Ellingwood 1993;Rodriguez et al 1997;Stewart and Rosowsky 1998;Mangat and Elgarf 1999;Vu and Stewart 2000;Torres-Acosta and Martinez-Madrid 2003;Coronelli and Gambarova 2004). Stewart (2004) proposes a stochastic model to take account of the spatial effect of pitting corrosion on structural reliability.…”

Section: Time-dependent Spatially Variable Resistancementioning

confidence: 99%

Spatial time-dependent reliability analysis of reinforced concrete slab bridges subject to realistic traffic loading

Hajializadeh

Stewart

Enright³

et al. 2015

Structure and Infrastructure Engineering

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Residual Life of Corroding Reinforced Concrete Structures in Marine Environment

Cited by 121 publications

References 12 publications

Nonlinear Gel Migration in Cracked Concrete and Broken Symmetry of Corrosion Profiles

Nonlinear Gel Migration in Cracked Concrete and Broken Symmetry of Corrosion Profiles

Predicción de la vida útil en servicio de edificios de 50 años expuestos a ambientes marinos

Spatial time-dependent reliability analysis of reinforced concrete slab bridges subject to realistic traffic loading

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