Evaluating ion diffusivity of cracked cement paste using electrical impedance spectroscopy

Akhavan, Alireza; Rajabipour, Farshad

doi:10.1617/s11527-012-9927-x

Cited by 42 publications

(26 citation statements)

References 35 publications

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“…In turn, cracking modifies the mass transport by creating continuous pathways that facilitate the penetration of aggressive ions [7], thus leading to a strongly coupled process. Such effect, experimentally observed in [8,9], is amplified by the external loads.…”

Section: Introductionmentioning

confidence: 77%

Towards multiscale modeling of the interaction between transport and fracture in concrete

2016

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Transport, fracture and their interaction in concrete are complex phenomena of great practical relevance for the durability of civil engineering structures. Due to the heterogeneous nature of the materials, encompassing a wide range of length scales, multiscale approaches are essential. In this paper, we outline some recent research results and open issues in this field. First, we present a microscale model which aims at simulating chloride diffusion and binding in cement. Then, we outline a mesoscale model addressing coupling between cracking and diffusion. Finally, we discuss open issues in the acquisition of the mesoscale geometry from X-ray computed tomography techniques.

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Section: Introductionmentioning

confidence: 77%

Towards multiscale modeling of the interaction between transport and fracture in concrete

2016

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“…Over the past decades, extensive experiments have been conducted for understanding the effect of cracks on diffusion of chloride ions in cement-based materials, including HCP, mortar and concrete, see [27][28][29][30][31]. In experiments, artificial and real cracks are employed.…”

Section: State Of the Art On The Effect Of Cracking On Diffusion In Cmentioning

confidence: 99%

“…Real cracks can be generated by mechanical loading. The brazilian test [30], the wedge splitting test [35], the three-point bending test [36] and the expansive core test [27] are four widely used experimental set-ups for measuring mechanical properties and generating cracks in cementitious specimens. [29,45,43,46] Cracked specimens are then employed to measure their diffusion properties, with either conventional methods [27,37] or accelerated methods [34].…”

Section: State Of the Art On The Effect Of Cracking On Diffusion In Cmentioning

confidence: 99%

A phase-field approach to fracture coupled with diffusion

Lorenzis

2016

Computer Methods in Applied Mechanics and Engineering

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“…Certain transport parameters, i.e. permeability or diffusion coefficient were able to be determined [27][28][29][30]. The electrical impedance can also be used in quantification of the physical properties of porous materials as monitor the microstructural characteristics of cementitious materials at early age [31].…”

Section: Introductionmentioning

confidence: 99%

Non-destructive Electrical Methods for Measuring the Physical Characteristics of Porous Materials

2015

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The durability of reinforced concrete structures, built on the seafront, has been at the heart of recent concerns. Indeed, chloride transport across the porosity of concrete coating produces medium to long-term corrosion of reinforcements. This has a direct impact on the mechanical behavior and the ageing of the affected structures. The difficulty of in situ monitoring of these structures, continuously and non-destructively against infiltration of chlorides, is still topical. The work presented here aims mainly at correlating the electrical properties, i.e. electrical resistance, conductivity…, with the physical characteristics (porosity, tortuosity, ...), of granular materials using Archie's law. The recommended experimental program consists in placing, different granular materials, i.e. sand, mortar, bricks, and concretes saturated with electrolytic solutions, in a PVC cell fitted with a pair of stainless steel electrodes connected to an electrical circuit, in order to measure the electrical resistances. The results obtained allow one to determine durability factors, such as the connected porosity and the coefficient of chloride diffusion through a simple measurement of the EC, and estimate the tortuosity parameter that governs transport in porous media.

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Evaluating ion diffusivity of cracked cement paste using electrical impedance spectroscopy

Cited by 42 publications

References 35 publications

Towards multiscale modeling of the interaction between transport and fracture in concrete

Towards multiscale modeling of the interaction between transport and fracture in concrete

A phase-field approach to fracture coupled with diffusion

Non-destructive Electrical Methods for Measuring the Physical Characteristics of Porous Materials

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