Time variation law of chlorine diffusion coefficient of marine concrete structures in tidal zone and its influence on service life

Xu, Yu; Gao, Yuning; Yu, Hongfa; Ma, Hongfang; Xu, Mei Juan; Xu, Zhongyang; Feng, Tian

doi:10.1016/j.jobe.2023.107379

Cited by 3 publications

(2 citation statements)

References 12 publications

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“…The results showed a better fit of chloride transport with the DuraCrete model [60], compared to the LNEC E465 [77] and Life365 models [78],with the splash zone having the most severe impact on concrete durability. A similar analysis was recently published by Xu et al [79], where the authors focused on the apparent chloride diffusion coefficient and its time-dependent constant of concrete exposed in the tidal zone based on a large number of natural exposure test data. The service life was calculated using the DuraCrete model [60], the Life365 model [78], and the ChaDuraLife model [80], with the latter proving to be the most cost-effective and reliable for prediction.…”

Section: Experimental Characterizationmentioning

confidence: 72%

Degradation Models and Maintenance Strategies for Reinforced Concrete Structures in Coastal Environments under Climate Change: A Review

Rincon,

Moscoso,

Hamami

et al. 2024

Buildings

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Modern engineering faces challenges in ensuring technical standards for service, durability, and sustainability. Political, administrative, and budgetary factors, coupled with climate change, pose tasks to structural integrity, affecting industries and economies. Marine infrastructures represent a strategic asset of a country as they handle a large part of the economic exchanges. This article analyzes five essential factors that play a fundamental role in the performance analysis of coastal structures: chloride-induced corrosion, degradation models, maintenance strategies, monitoring, and climate change. We start with reinforcement corrosion, which is considered as the main cause of distress, particularly in coastal zones, for the long-term behavior of structures. Additional pressure from the influences of climate change is becoming evident and extreme, leading to a reduction in capacity. To guarantee the lifespan of infrastructures, degradation models contribute by estimating the long-term performance of the asset as a strategic piece to the development of effective maintenance solutions. Artificial Neural Networks (ANNs) have gained recent prominence in this field due to their ability to learn intricate patterns from historical data, making them valuable instruments for predicting structural deterioration. Additionally, quantifying the condition of the structure from monitoring data plays a crucial part in providing information on the current situation of the structure. Finally, this review summarizes the challenges associated with the maintenance of aging marine structures considering aspects such as corrosion, monitoring, and the future challenges this area will face due to climate change.

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Section: Experimental Characterizationmentioning

confidence: 72%

Degradation Models and Maintenance Strategies for Reinforced Concrete Structures in Coastal Environments under Climate Change: A Review

Rincon,

Moscoso,

Hamami

et al. 2024

Buildings

View full text Add to dashboard Cite

show abstract

“…The corrosion mechanism of chloride under different exposure conditions varies [98,99]. Depending on the exposure conditions, concrete can be categorized into four parts, i.e., atmospheric, splash, tidal, and underwater zones (see Figure 3 for details) [100].…”

Section: Corrosion Mechanisms Of Concrete Under Different Exposure Co...mentioning

confidence: 99%

Advances in Modeling Surface Chloride Concentrations in Concrete Serving in the Marine Environment: A Mini Review

Zhao,

Li,

Guan

2024

Buildings

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Chloride corrosion is a key factor affecting the life of marine concrete, and surface chloride concentration is the main parameter for analyzing its durability. In this paper, we first introduce six erosion mechanism models for surface chloride ion concentration, reveal the convection effect in the diffusion behavior of chloride ions, and then introduce the corrosion mechanisms that occur in different marine exposure environments. On this basis, the analysis is carried out using empirical formulations and machine learning methods, which provides a clearer understanding of the research characteristics and differences between empirical formulas and emerging machine learning techniques. This paper summarizes the time-varying model and multifactor coupling model on the basis of empirical analysis. It is found that the exponential function and the reciprocal function are more consistent with the distribution law of chloride ion concentration, the multifactor model containing the time-varying law is the most effective, and the Chen model is the most reliable. Machine learning, as an emerging method, has been widely used in concrete durability research. It can make up for the shortcomings of the empirical formula method and solve the multifactor coupling problem of surface chloride ion concentration with strong prediction ability. In addition, the difficulty of data acquisition is also a major problem that restricts the development of machine learning and incorporating concrete maintenance conditions into machine learning is a future development direction. Through this study, researchers can systematically understand the characteristics and differences of different research methods and their respective models and choose appropriate techniques to explore the durability of concrete structures. Moreover, intelligent computing will certainly occupy an increasingly important position in marine concrete research.

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Research progress of silane impregnation and its effectiveness in coastal concrete structures: A review

Zewei,

Xiaodong,

Ming

2024

Journal of Building Engineering

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Time variation law of chlorine diffusion coefficient of marine concrete structures in tidal zone and its influence on service life

Cited by 3 publications

References 12 publications

Degradation Models and Maintenance Strategies for Reinforced Concrete Structures in Coastal Environments under Climate Change: A Review

Degradation Models and Maintenance Strategies for Reinforced Concrete Structures in Coastal Environments under Climate Change: A Review

Advances in Modeling Surface Chloride Concentrations in Concrete Serving in the Marine Environment: A Mini Review

Research progress of silane impregnation and its effectiveness in coastal concrete structures: A review

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