Numerical assessment of external sulfate attack in concrete structures. A review

Ikumi, Tai; Segura, Ignacio

doi:10.1016/j.cemconres.2019.04.010

Cited by 99 publications

(36 citation statements)

References 43 publications

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“…When the volume of expansive products is larger than that of the reactant, the change of volume induces swelling stress. On the basis of previous studies, this investigation mainly considers the expansion of ettringite (Ikumi and Segura, 2019). The dissolution of CH is not considered here, which can be further considered in the future work.…”

Section: Mechanism Of Sulfate Attack On Concretementioning

confidence: 99%

A chemo-micromechanical damage model of concrete under sulfate attack

Zhou

2021

International Journal of Damage Mechanics

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It is essential to explore the corrosion cracking of concrete under sulfate attack to predict the service performance and durability of concrete structures. The damage degree of concrete caused by sulfate attack is quantitatively investigated. Based on the damage mechanism of the local cracking stage, a chemo-micromechanical damage model of sulfate attack of concrete is established by elasto-damage mechanics. The progressive degradation behavior of concrete under sulfate attack is divided into three zones, including the chemical corrosion zone, the damaged concrete zone by expansive stress, and the intact concrete zone. The proposed chemo-micromechanical damage model can quantitatively determine the effects of chemical sulfate corrosion on mechanical properties of concrete. In addition, the present model considers the interaction among corrosion products, the damaged concrete, the intact concrete and uncorrupted hydration products. The comparison between the calculation results and the available experimental data shows that the proposed model is feasible for corrosion cracking analysis. Based on the proposed model, the influencing factors of concrete damage are discussed. With the increase of corrosion degree, the content of corrosion products, the expansion coefficient of corrosion products and the initial radius of corrosion products, the elastic moduli of concrete decrease after sulfate attack. When the tensile strength and rigidity of concrete matrix reduce, the effective elastic moduli of concrete after sulfate attack also deteriorate. The numerical results exhibit that the proposed chemo-micromechanical model is of notable significance to the application of the chemo-mechanical coupling problems of cementitious composite materials.

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Section: Mechanism Of Sulfate Attack On Concretementioning

confidence: 99%

A chemo-micromechanical damage model of concrete under sulfate attack

Zhou

2021

International Journal of Damage Mechanics

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“…Substitution of equation 9into equation 6, the corresponding strain of concrete is derivated, written as equation (10). Integrating equations (6), (9), and (10), the compressive peak stress of concrete can be formulated as equation (11):…”

Section: �� D(ln X) φ(•) Stands For a Standard Normal Distribumentioning

confidence: 99%

“…e durability and service life of concrete structures can be significantly affected by the environment. Especially, the sulfate attack is a major threat to the durability of concrete structures, which causes strength loss [1], changes of mass [2] and microstructure [3], degradation of durability [4] and service life [5], deformation behavior [6], formations of expansive products [7] and noncohesive mass [8], and loss of cohesion of cement hydration products [9,10]. As a consequence, the reliability of the concrete structures is degraded gradually [11].…”

Section: Introductionmentioning

confidence: 99%

Damage Constitutive Model and Mechanical Performance Deterioration of Concrete under Sulfate Environment

Liu

Chen

et al. 2020

Mathematical Problems in Engineering

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The effects of erosion mode, erosion age, and concentration of sulfate solution on mechanical properties of concrete were investigated. The dimensionless relationship model of the stress-strain of concrete on the basis of randomness was proposed. The variation of the elasticity modulus and Poisson’s ratio of the concrete surface attacked by sulfate was studied, and a novel method of using a superficial parameter to characterize the performance change of the concrete surface was recommended. The results showed that the dimensionless relationship model of stress-strain of concrete could be used to represent the variations of mechanical properties of concrete. The differences of load-displacement of concrete before and after sulfate attack were reflected as the change of curve’s slope and ultimate bearing capacity, and the slope of a straight section of the lateral and longitudinal strain curves of concrete surface also varied. The increment rates of ultimate bearing capacity of concrete attacked by 1% and saturated sulfate solution were about 30% and 10%, respectively. However, the decreasing ratio of the ultimate bearing capacity of concrete attacked by saturated sulfate solution was approximately 25%. The damage factor of the elasticity modulus of the concrete surface of C20 and C40 was 0.185 and −0.19, respectively. The obtained results could provide a support for investigating the variations of stress-strain relationship and mechanical performance of concrete under a sulfate environment.

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“…These methods provide another powerful tool for studying sulfate attack in concrete in addition to experiments. Ikumi et al [13][14][15] proposed a simplified chemical-mechanical model to evaluate the damage evolution of concrete structures exposed to sulfate environment. The model considered not only penetration acceleration caused by sulfate consumption and cracks but also the reduction of diffusion coefficient that resulted from pore filling to analyze the failure mode of concrete.…”

Section: State Of the Artmentioning

confidence: 99%

Numerical Simulation of the Ion Transport Behavior in Concrete under Coupled Axial Loading and Sulfate Attack

2020

Teh. vjesn.

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Numerical assessment of external sulfate attack in concrete structures. A review

Cited by 99 publications

References 43 publications

A chemo-micromechanical damage model of concrete under sulfate attack

A chemo-micromechanical damage model of concrete under sulfate attack

Damage Constitutive Model and Mechanical Performance Deterioration of Concrete under Sulfate Environment

Numerical Simulation of the Ion Transport Behavior in Concrete under Coupled Axial Loading and Sulfate Attack

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