Optimizing Cover Rebuilding Maintenance for Reinforced Concrete Structures Exposed to Chloride Attack

Truong, Quynh Chau; Soueidy, Charbel‐Pierre El; Bastidas‐Arteaga, Emilio; Li, Yue

doi:10.1007/978-3-030-91877-4_18

Cited by 1 publication

(2 citation statements)

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“…The validity of the proposed model for chloride ingress is confirmed by comparing the simulated chloride profile with the experimental observational results in the research works of Yu et al [10] and Roy et al [11]. The validation methodology and results were presented in detail in the previous study of Truong et al [12] and are not included in this paper.…”

Section: Numerical Solution Of Chloride Ingress In Unrepaired Concret...mentioning

confidence: 89%

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Maintenance modeling and cost assessment for repaired reinforced concrete structures exposed to chloride attack in coastal areas in Vietnam

Truong,

Nguyen,

Soueidy

et al. 2023

IOP Conf. Ser.: Mater. Sci. Eng.

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One of the primary causes that can reduce the lifespan of concrete structures is chloride-induced corrosion of reinforcing steel. Recent research has shown that material properties, exposure conditions and climatic conditions have a significant influence on the structural deterioration of reinforced concrete (RC) structures, especially in marine environments. The objective of this paper is to predict the durability of RC structures damaged by chloride-induced corrosion in near-shore environments in Vietnam, considering regular repair activities. A two-dimensional model of chloride penetration in square cross-section RC columns repaired by cover replacement techniques is studied. Two repair methods with different shapes (orthogonal and circular) are considered. The effects of the different repair methods on the life span of structures are investigated in case studies in Vietnam that consider the variations of annual temperature and humidity in three coastal areas such as Danang, Haiphong, and Ho Chi Minh City. Finally, maintenance and repair costs during the lifetime of structures are calculated for each case. The study suggests that for RC structures exposed to two-dimensional chloride ingress, the most critical areas for assessing chloride concentration, predicting corrosion initiation, and planning repair schedules are the corners of the columns. In addition, the chloride-induced corrosion process is strongly influenced by the local weather conditions, especially in areas with high humidity. The repair method with circular concrete replacement seems to be more efficient in terms of maintenance schedule and cost than the repair method with orthogonal concrete replacement.

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Section: Numerical Solution Of Chloride Ingress In Unrepaired Concret...mentioning

confidence: 89%

“…C RP =C t * S RP * n RP (12) where C t the repair cost for a single repair at the scheduled time, S RP is the surface area of the structure requiring repairs, and n RP the number of repairs.…”

Section: Assessment Of Lifetime Maintenance Costmentioning

confidence: 99%