Investigation on service life prediction models of reinforced concrete structures exposed to chloride laden environment

Athibaranan, S.; Karthikeyan, J.; Rawat, Shilpi

doi:10.1007/s41024-021-00149-8

Cited by 8 publications

(4 citation statements)

References 21 publications

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“…Since aggregates make up around 75% of the volume of common concrete mixtures, aggregate characteristics have a big impact on chloride dispersion and the resilience of concrete structures [17,18]. In order to estimate the service life of given buildings with known mixes and materials, multiple researchers by [19,20,21] have studied the problem of chloride diffusion and developed various chloride prediction and service life models. "A helpful foundation for constructing reinforced concrete structures in salt-contaminated settings has been created by" [22].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Chloride Diffusion into Concrete with Joint

Mishael,

Yan

2023

JERR

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The passive layer shielding the steel reinforcement from corrosion can be attacked by the chloride ions that permeate through the chloride ions that permeate through the pores in the concrete when it is in solution. This paper aims to explore the investigation of chloride diffusion into concrete with joint. Three exposure conditions were taken into consideration in chloride ion diffusion experiments in order to examine the impact of exposure conditions on the chloride ion diffusion property: long-term immersion in a static sodium chloride solution, long-term immersion in a circulating sodium chloride solution, and dry–wet cycles in a circulating sodium chloride solution. According to experimental findings, the age of erosion increased the chloride ion content at a particular depth. Furthermore, concrete subjected to dry-wet cycles of the circulating sodium chloride solution had slightly higher chloride ion content than concrete immersed in the solution for an extended period of time. Fick's second law served as the foundation for the empirical equations that were developed by fitting experimental data to determine the chloride content and diffusion coefficient at the concrete's surface, as well as the correlation coefficient values for various exposure scenarios. The calculation formula's greater applicability was confirmed by comparison with the experiment results. The chloride ion content could be predicted and examined using this method for various exposure scenarios.

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Section: Introductionmentioning

confidence: 99%

Investigation of Chloride Diffusion into Concrete with Joint

Mishael,

Yan

2023

JERR

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“…However, many buildings begin to show pathological manifestations a few years after their construction, leading to an early deterioration (FAQIH; ZAYED; SOLIMAN; 2020). Early deterioration of a building can be caused by design failures, construction failures, misuse and the absence of proper maintenance in buildings (ATHIBARANAN; KARTHIKEYAN;RAWAT, 2022;HAUASHDH et al, 2020). In addition to corroborating with the emergence of pathological problems, aesthetically harming the building, early deterioration can reduce the performance of the building, reduce its lifespan, negatively impact the health of users and increase the cost of maintenance (BAUER et al, 2020;OLANREWAJU et al 2022;SILVA et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Analysis of pathological manifestations through damage map: case study in Buildings I and K of the Polytechnic School of Pernambuco

AZEVEDO,

JÚNIOR,

SANTOS

et al. 2023

Proceedings of XIX International Conference on Building Pathology and Constructions Repair

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Building inspection in constructions is important to verify that the building is in good safety condition for its occupants, identify problems that harm people's comfort or even determine preventive maintenance to avoid problems early, helping to extend the life of the building. One of the ways to document the condition of a building is through the damage map. The objective of this article is to present the survey of the existing pathological manifestations on the facades of Buildings I and K of the Polytechnic School of Pernambuco, representing them using damage maps to contribute to the maintenance and restoration services of the analyzed buildings. To this end, the architectural survey of the facades of Buildings I and K was carried out, the photographic survey was done using smartphone and drone and finally, the creation of the damage map. With the analysis of the results, it was noticed the presence of 14 pathological manifestations, where the most recurrent were grime and efflorescence. The front and right lateral facades presented the highest and lowest number of pathological manifestations, respectively. With the periodic survey of the pathological manifestations and their representations in damage maps it will be possible to create an evolution chart of the state of Buildings I and K and plan future preventive and/or corrective maintenance.

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“…Concrete structures are exposed to both physical and chemical degradation offshore. The main chemical deterioration is caused by seawater constituents on cement hydration products and the crystallization of salts in the concrete [1,2]. Water waves, floating objects, freezing, and thawing cause physical erosion [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…Figure 3. Instrumental setup: 1 Computer,2 Lecroy Oscilloscope,3 Pulser-receiver,4 Ultrasonic probe,5 Immersion scanning tank,6 Coated concrete specimen, and 7 Probe positioning unit.…”

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confidence: 99%

Neural-Network-Based Ultrasonic Inspection of Offshore Coated Concrete Specimens

Malikov

Kim

et al. 2022

Coatings

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A thin layer of protective coating material is applied on the surface of offshore concrete structures to prevent its degradation, thereby extending the useful life of the structures. The main reasons for the reduction in the protective capability of coating layers are loss of adhesion to concrete and flattening of the coating layer wall. Usually, the state of the coating layer is monitored in the setting of water immersion using ultrasonic inspection methods, and the method of inspection still needs improvement in terms of speed and accuracy. In this study, the ultrasonic pulse echo method was used in a water immersion test of the coated specimens, and continuous wavelet transform (CWT) with complex Morlet wavelets was implemented to define the received waveforms’ time of flight and instantaneous center frequency. These allow one to evaluate the thickness of the coating layer during water immersion. Furthermore, phases of reflected echoes at CWT local peaks were computed using a combination of Hilbert transforms (HT) and wave parameters derived from CWT. In addition, three relative wave parameters of echoes were also used to train deep neural networks (DNN), including instantaneous center frequency ratio, CWT magnitude ratio, and phase difference. With the use of three relative waveform parameters of the DNN, the debonded layer detection accuracy of our method was 100%.

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Investigation on service life prediction models of reinforced concrete structures exposed to chloride laden environment

Cited by 8 publications

References 21 publications

Investigation of Chloride Diffusion into Concrete with Joint

Investigation of Chloride Diffusion into Concrete with Joint

Analysis of pathological manifestations through damage map: case study in Buildings I and K of the Polytechnic School of Pernambuco

Neural-Network-Based Ultrasonic Inspection of Offshore Coated Concrete Specimens

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