Carbonation-Induced and Chloride-Induced Corrosion in Reinforced Concrete Structures

Zhou, Yue; Gencturk, Bora; Willam, Kaspar; Attar, Arezou

doi:10.1061/(asce)mt.1943-5533.0001209

Cited by 173 publications

(68 citation statements)

References 83 publications

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“…The other notable chemical constitute of the soil, i.e., chloride, well known for its corrosion-causing capability particularly to reinforce concrete structures [14] can be responsible to the failure of steel pipes. However, from the comprehensive reviews, it can be found out that the research related to the effect of chlorides present in soil and the corresponding corrosion of carbon steel pipes is limited.…”

Section: Introductionmentioning

confidence: 99%

Influence of Chemical Properties of Soil on the Corrosion Morphology of Carbon Steel Pipes

Wasim¹,

Shoaib²

2019

Metals in Soil - Contamination and Remediation

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Corrosive soils are responsible for the deterioration of buried underground utilities such as buried steel pipes. Frequent pipe failures are reported due to corrosive soil globally. Although soil's corrosion phenomenon has been understood and identified long time ago, pipe failures due to corrosive soil are uncontrollable and unavoidable despite the use of protective coatings and techniques such as cathodic protection. Therefore, it is essential to review the causes of soil's corrosivity for the protection of steel pipes. This chapter demonstrates the influence of varying moisture and chloride contents of soils on the corrosion of coated and uncoated steel pipes. Carbon steel specimens (coated and uncoated) were buried in soils of 20, 40, 60, and 80 wt.% moisture content, respectively, while the chloride concentration introduced in soil was 0, 5, and 10 wt.%, respectively. Through the analysis of experiments, it is revealed that the corrosion rate of pipes buried in soil increases with increase in moisture content up to critical moisture and chloride values. The influence of soil's moisture and chloride on the corrosion products formed on steel pipes was investigated and comprehensively explained in this chapter. Authors believe that the knowledge presented in this chapter can be applied to other structures or utilities buried in corrosive soils.

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Section: Introductionmentioning

confidence: 99%

Influence of Chemical Properties of Soil on the Corrosion Morphology of Carbon Steel Pipes

Wasim¹,

Shoaib²

2019

Metals in Soil - Contamination and Remediation

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“…The electrons given by anodic area are consumed at the cathodic area (O 2 + 2H 2 O + 4e − → 4OH − ). Pore solution as a conducting medium for the transportation of electrons and ions ensure the corrosion process to proceed [20]. The electrochemical nature of corrosion means that electrochemical techniques can be used to monitor the corrosion behavior such as corrosion rate or corrosion current density of rebar in concrete.…”

Section: Introductionmentioning

confidence: 99%

Effect of Crack on Durability of RC Material under the Chloride Aggressive Environment

et al. 2018

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Exposed to aggressive environments, the rebar in reinforced concrete (RC) bridges will be corroded gradually. Durability of RC material mostly depends on the rebar corrosion behavior. In this research, influences of crack on rebar corrosion were investigated. Firstly, RC specimens with different crack number, width and spacing were prepared and the rebar corrosion was conducted through an accelerated chloride penetration method. Then, corrosion current densities of rebar were calculated from electrochemical test methods including liner polarization (LP), Tafel potentiodynamic polarization (TPP) and electrochemical impedance spectroscopy (EIS) measurements. Finally, the discussion was presented about a more reasonable electrochemical testing method for rebar corrosion in RC material. Besides, the significant influence factor among crack width, number and spacing was evaluated based on both One-way analysis of variance (One-way ANOVA) and Turkey's honest significant difference (Turkey's HSD) test. The results revealed that a more reasonable way to obtain corrosion current densities of rebar is combining EIS measurement with TPP measurement. Crack number shows the most significant effect on corrosion behavior of rebar, while crack spacing possesses the least one.

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“…Generally, the damage of the passivation film is regarded as the initiating factor of reinforcement corrosion (Heiyantuduwa, Alexander, & Mackechnie, 2006;Zhou, Gencturk, Willam, & Attar, 2015). The entire chemical process of concrete carbonation can be expressed in Eqn (1) (Papadakis, Vayenas, & Fardis, 1989;Zhou et al, 2015): At present, there are many models for calculating the carbonation depth of concrete, and the model can be categorised as theoretical model, semi-theoretical/semi-empirical model, and empirical model. The theoretical model (Papadakis et al, 1991a;Steffens, Dinkler, & Ahrens, 2002;Ishida & Li, 2008) is derived from physical principles.…”

Section: Concrete Carbonation Depth Modelmentioning

confidence: 99%

Effect of Concrete Stress States on Carbonation Depth of Concrete

Wang

et al. 2019

Journal of Civil Engineering and Management

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Carbonation can lead to reduction of alkalinity of concrete and initiation of steel reinforcement corrosion. In durability design of concrete structures, the carbonation depth should be duly considered. However, the concrete stress state would influence the carbonation depth, and there has been inadequate research on such effect. In this study, it is proposed to introduce a stress influence coefficient to the concrete carbonation depth model. With reference to the experimental data from eleven research studies in the literature encompassing both tensile and compressive stress states, the relationship between stress influence coefficient and concrete stress ratio is quantitatively investigated, and mathematical equations relating the stress influence coefficient with the concrete stress ratio are established. Comparative study with three typical existing groups of equations shows that the proposed equations of stress influence coefficient are more reasonable and have a higher reliability. The effects of carbonation time, mix proportions of concrete on stress influence coefficient are also analysed, and the magnitudes of the effects are found to be approximately within ±10%. Finally, the modified carbonation depth models are proposed and verified by the experimental data, which suggests that the proposed models are of desirable accuracy. Adoption of the proposed equations as the modified formula of stress influence coefficient in the concrete carbonation depth model for practical applications is recommended.

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Carbonation-Induced and Chloride-Induced Corrosion in Reinforced Concrete Structures

Cited by 173 publications

References 83 publications

Influence of Chemical Properties of Soil on the Corrosion Morphology of Carbon Steel Pipes

Influence of Chemical Properties of Soil on the Corrosion Morphology of Carbon Steel Pipes

Effect of Crack on Durability of RC Material under the Chloride Aggressive Environment

Effect of Concrete Stress States on Carbonation Depth of Concrete

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