Electrochemical deposition induced continuum damage-healing framework for the cementitious composite

Zhu, Hehua; Chen, Qing; Ju, J. W.; Yan, Zhiguo; Jiang, Zhengwu

doi:10.1177/1056789521991871

Cited by 8 publications

(3 citation statements)

References 50 publications

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“…By defining the level set delta function and deposit rate of Mgfalse(normalOH)2 on the cathode surface in the transport equation, the deposit growth and changes in concentration of ions in terms of time and under different voltages were presented. Zhu et al 23 using an electrochemical deposition method and a continuous damage improvement framework, proposed an approach for repairing concrete. Wang et al 24 arranged a simulation to determine the deposit's effective diffusion coefficient and conductivity, by considering the deposition of Mgfalse(normalOH)2 and using the Bruggeman relationship.…”

Section: Introductionmentioning

confidence: 99%

Corrosion deposition in deforming anodes of in-ground cathodic protection systems: A three-dimensional transient study

Shirshahi,

Mansouri,

Taheri

et al. 2024

Corrosion Engineering, Science and Technology: The Internationa

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Cathodic protection as a complementary technique is widely considered in the industry along with the selection of suitable materials as well as efficient coating considerations. In cathodic protection (CP), anode produces a current output to protect the structure (cathode) and part of the current output is wasted by the grounding system. We developed a 3D, and time-dependent numerical model to simulate the anode corrosion (using arbitrary Lagrangian-Eulerian method), find the deposit formation (by interface tracking level set method), anode mass loss and current wasted by the grounding system. We also defined a CP efficiency as anode mass loss times the current percentage received by the structure. The CP efficiency can be utilized for anode quantity and placement pattern. The results showed when the conductivity of corrosion products (deposit) is lower than that of soil, the current output from the anode decreases over time. When the deposit conductivity is higher than that of soil, the current output from the anode increases in time, reaches a peak, then decreases. This is due to the competition among three factors: anode surface increase, medium conductivity change, and inhibition effect of the deposition layer. For the studied case, almost 54% of the current from the anode is wasted by the grounding system. To illustrate the significance of CP efficiency, this study compares three alternative anode configurations with the original design. It is observed that for a 14.5 kg anode, burying the anodes 2 m deeper enhances the mean potential distribution on the structure by 4%. Additionally, the configuration featuring the 7.7 kg anode, owing to its superior dimensional design, demonstrates improved performance compared to other configurations.

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Section: Introductionmentioning

confidence: 99%

Corrosion deposition in deforming anodes of in-ground cathodic protection systems: A three-dimensional transient study

Shirshahi,

Mansouri,

Taheri

et al. 2024

Corrosion Engineering, Science and Technology: The Internationa

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“…There is no doubt that the research on resilience at the material level will become a research hotspot in the field of materials. Concrete structures built with self-healing materials have self-healing properties after disaster damage, and research on this aspect can improve the safety and sustainability of the entire life cycle of underground structures (Chen et al., 2021; Ivica et al., 2022; Tian et al., 2019; Voyiadjis et al., 2020; Wei et al., 2023; Zhang et al., 2022; Zhu et al., 2021). Based on different healing methods, many healing materials have been proposed by different scholars, such as the microencapsulated self-healing concrete (Andrushia et al., 2020a, 2020b; Jahadi et al., 2023; Zhou et al., 2020; Zhuang et al., 2021), the UHPC (Fang et al., 2022; Luo et al., 2019; Zhu et al., 2022), the slurry infiltrated fiber concrete (Zhou et al., 2023), the lightweight aggregate concrete (Xiong et al., 2019, 2022a, 2022b), the calcined wollastonite powder (Zheng et al., 2021), the ECC (Zhou et al., 2020) and the bacteria-based concrete (Zhuang and Zhou, 2019).…”

Section: Introductionmentioning

confidence: 99%

A resilience assessment framework for microencapsulated self-healing cementitious composites based on a micromechanical damage-healing model

Han,

Ju,

Zhang

et al. 2023

International Journal of Damage Mechanics

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In this paper, a resilience assessment framework for microencapsulated self-healing cementitious composites is proposed based on a micromechanical damage-healing model. A 3D micromechanical analytical model is constructed to analyze the performance evolution during the damage-healing process of self-healing concrete. The resilience assessment of microencapsulated self-healing concrete is defined by virtue of the residual stiffness, self-healing effect on stiffness and damage cumulative on stiffness, which corresponds to three main features of resilience; namely, the robustness, recoverability and adaptability. The assessment results indicate that the release of healing agents within microcapsules and healing process of extended microcracks allows the microencapsulated self-healing concrete to have higher resilience than conventional concrete. Moreover, a parameter sensitivity analysis is conducted to investigate the influence of the healing efficiency, the applied initial damage and the fracture toughness of the repaired microcrack on resilience of microencapsulated self-healing concrete. The results indicate that higher healing efficiency and applied initial damage leads to high resilience, and fracture toughness of the repaired microcrack makes less difference to the results. The findings of this paper lay a theoretical foundation for the resilience design of self-healing material layer of underground structures.

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“…Under the SA, it is essential to predict the mechanical behavior of cementitious materials qualitatively and quantitatively. The mechanical property is an important aspect to reflect the deterioration of concrete (Han et al., 2021; Zhang et al., 2020, 2021; Zhu et al., 2021). Therefore, it is necessary to establish a numerical model of concrete under the SA to analyze and explore the deterioration process of concrete.…”

Section: Introductionmentioning

confidence: 99%

A numerical chemo-micromechanical damage model of sulfate attack in cementitious materials

Zhou

Wang

2022

International Journal of Damage Mechanics

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The sulfate attack (SA) of cementitious materials widely exists, which severely reduces the mechanical properties and durability of cementitious materials. However, few numerical SA damage models of cementitious materials have been comprehensively developed. The understanding and simulation of the chemo-mechanical behavior of cementitious materials are beneficial to better modeling, predictions and designs of underground structures. In this research, a numerical chemo-micromechanical damage model under the SA and loading is proposed to explore the cracking process of the cementitious materials based on the discrete element method (DEM). Some inherent characteristics of the chemical attack can be well considered in the proposed numerical model. The local damage effect can be simulated, as well as the sulfate corrosion degree and the material component. The performance of this proposed model is confirmed and validated by available experimental results. We examine the dependence of the strength and the elastic moduli of the cementitious material on: (a) the content of ettringite, (b) the distribution of ettringite, (c) the mechanical properties of the cementitious matrix, (d) the void ratio of the cementitious materials, (e) the confining pressure, and (f) the expansion coefficient of sulfate corrosion products. The softening and fluctuating phenomena are witnessed in the stress-strain curves. The failure mode of cementitious materials with the SA is different from that of specimens without the SA. The damage parameters of cementitious materials under the SA are examined in depth. The numerical results reveal that the proposed damage model is feasible and valuable in the modeling, predictions, applications and durability of chemo-mechanical sulfate attack problems in cementitious materials.

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Electrochemical deposition induced continuum damage-healing framework for the cementitious composite

Cited by 8 publications

References 50 publications

Corrosion deposition in deforming anodes of in-ground cathodic protection systems: A three-dimensional transient study

Corrosion deposition in deforming anodes of in-ground cathodic protection systems: A three-dimensional transient study

A resilience assessment framework for microencapsulated self-healing cementitious composites based on a micromechanical damage-healing model

A numerical chemo-micromechanical damage model of sulfate attack in cementitious materials

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