A Statistical Evolution Model of Concrete Damage Induced by Seawater Corrosion

Lv, Hangjie; Chen, Jiankang; Lu, Chunsheng

doi:10.3390/ma14041007

Cited by 10 publications

(5 citation statements)

References 32 publications

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“…The durability of concrete in the marine environment is an important hidden danger to the safety of concrete structures. Among them, chloride ion penetration is one of the main reasons for the durability of concrete, and the effect of dry–wet alternation greatly accelerates the penetration of corrosive ions, and the tidal range area becomes the most serious area for concrete structure corrosion [ 3 , 4 , 5 , 6 , 7 ]. Therefore, it is of great significance to carry out research on the effect of concrete’s anti-chloride ion corrosion performance under dry–wet alternation action.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Influence of Rubber Content on Chloride Salt Corrosion Resistance Performance of Concrete

Pang

Huang

2021

Materials

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In order to enhance the corrosion resistance of concrete to chloride salt, 5% NaCl solution was used to corrode ordinary concrete (OC) and rubber concrete (RC) with 5%, 10%, and 15% rubber content, respectively. By testing the compressive strength, mass, chloride ion concentration at different depths and relative dynamic elastic modulus, the erosion mechanism was analyzed by means of SEM scanning and EDS patterns, and the mechanical properties and deterioration degree of ordinary concrete (OC) and rubber concrete (RC) under the corrosion environment of chloride salt were studied. The results show that: the quality of rubber mixed into concrete increases first and then decreases, and rubber can increase the compressive strength of concrete, improve its internal structure. At the same time, the mechanical properties of concrete in the corrosion environment of chloride salt are improved to a certain extent, and the deterioration degree is reduced. Considering the comprehensive performance of OC and RC in the dry–wet alternation mechanism under chloride salt corrosion, the best content of rubber is 10%.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on the Influence of Rubber Content on Chloride Salt Corrosion Resistance Performance of Concrete

Pang

Huang

2021

Materials

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“…It combines with surrounding free ions and tends towards equilibrium. The aggregate particles inside C-S-H can bond with each other to form a spatial system [44], which largely determines the strength of concrete. Figure 18a shows the microscopic morphology of hydration products in full coral concrete without being mixed with shellfish marine impurities.…”

Section: Conversion Relationship Between Flexural Strength and Compre...mentioning

confidence: 99%

Effects of Marine Shellfish on Mechanical Properties and Microstructure of Coral Concrete

Zhao,

Wu,

Akbar

et al. 2023

Buildings

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Using coral debris as coarse and fine aggregates and seawater as mixing water has been proposed to address transportation and material shortage issues in island and reef construction projects. However, the utilization of coral may result in impurities, such as shellfish and other marine organisms, which could impact the mechanical properties of the resulting concrete. The goal of this study is to find out how different amounts of shellfish and marine organism impurities affect the mechanical properties and microstructure of coral concrete. This study builds on the process of making full coral concrete. Substitution optimization is carried out using the response surface method (RSM), with the polynomial work expectation serving as a validation measure. The experimental findings indicate that impurities have an insignificant impact on the mechanical properties of coral concrete when their dosage is below 2%, causing a decrease of only around 6%. The mechanical properties of coral concrete containing shellfish and marine organism impurities exhibit a strong correlation at 28 days. SEM and XRD analysis revealed that the primary factor contributing to the decline of mechanical properties in coral concrete with shellfish and marine organism impurities is the weak strength of the impurity shell structure, in addition to the rehydration of internal biomass during the cement hydration process, leading to the formation of numerous small pores within the coral concrete. The results of an ANOVA test indicate that the model is statistically significant, with a p-value of less than 0.05.

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“…Impinging chloride ions rapidly produce a so-called "skin effect" on the immersed concrete surface where chloride concentrations are at their highest levels [30]. There have been many attempts to model the ingress of aggressive ions and subsequent deterioration reactions in concrete subjected to the marine environment [28,[31][32][33]. Results differ considerably, making this a highly complex area.…”

Section: Chemical Corrosionmentioning

confidence: 99%

Biodeterioration and Chemical Corrosion of Concrete in the Marine Environment: Too Complex for Prediction

Gaylarde,

Ortega-Morales

2023

Microorganisms

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Concrete is the most utilized construction material worldwide. In the marine environment, it is subject to chemical degradation through reactions with chloride (the most important ion), and sulfate and magnesium ions in seawater, and to biodeterioration resulting from biological (initially microbiological) activities, principally acid production. These two types of corrosions are reviewed and the failure of attempts to predict the degree of deterioration resulting from each is noted. Chemical (abiotic) corrosion is greatest in the splash zone of coastal constructions, while phenomenological evidence suggests that biodeterioration is greatest in tidal zones. There have been no comparative experiments to determine the rates and types of microbial biofilm formation in these zones. Both chemical and microbiological concrete deteriorations are complex and have not been successfully modeled. The interaction between abiotic corrosion and biofilm formation is considered. EPS can maintain surface hydration, potentially reducing abiotic corrosion. The early marine biofilm contains relatively specific bacterial colonizers, including cyanobacteria and proteobacteria; these change over time, producing a generic concrete biofilm, but the adhesion of microorganisms to concrete in the oceans has been little investigated. The colonization of artificial reefs is briefly discussed. Concrete appears to be a relatively prescriptive substrate, with modifications necessary to increase colonization for the required goal of increasing biological diversity.

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A Statistical Evolution Model of Concrete Damage Induced by Seawater Corrosion

Cited by 10 publications

References 32 publications

Experimental Study on the Influence of Rubber Content on Chloride Salt Corrosion Resistance Performance of Concrete

Experimental Study on the Influence of Rubber Content on Chloride Salt Corrosion Resistance Performance of Concrete

Effects of Marine Shellfish on Mechanical Properties and Microstructure of Coral Concrete

Biodeterioration and Chemical Corrosion of Concrete in the Marine Environment: Too Complex for Prediction

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