Influence of external loading and loading type on corrosion behavior of RC beams with epoxy-coated reinforcements

Wang, Xiao Hui; Chen, Bing; Gao, Yang; Wang, Jing; Gao, Lu

doi:10.1016/j.conbuildmat.2015.05.101

Cited by 23 publications

(13 citation statements)

References 36 publications

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“…In the present paper, we prepared 300×120×1500 (mm) RC test specimens ( Fig.1) [43][44]. After 28-day curing, test specimens were subjected to pre-exposure in-service static (one-time 18kN load) and fatigue loads (500,000 cycles and 5.4 to 18kN), respectively.…”

Section: Experimental Procedures and Methodsmentioning

confidence: 99%

“…Two weeks later, the plastic sheets and sponges were moved away to make the specimens air-dried for one week. Thus three weeks constituted one cycle of wetting and drying [43].…”

Section: Chloride Exposure Conditionsmentioning

confidence: 99%

“…Displacements at mid-span and the two pivots of the supports of each test specimen were measured by displacement transducers. A load cell was used to control and record the magnitudes of static and fatigue loads [43]. Fatigue loading test details for test specimens in Group 3 are found in [47].…”

Section: Induction Of Cracks By Loading Testmentioning

confidence: 99%

“…All test specimens (RC beams) were designed with a rectangular cross section ( Fig.1) [43][44] reinforced by three 12 mm diameter deformed bars (flexural reinforcements) and 8 mm diameter smooth bars (distribution reinforcements). Reinforcing bars were bought from OSD Company in Jiangsu Province, China.…”

Section: Specimen Details and Materialsmentioning

confidence: 99%

“…Two weeks later, the plastic sheets and sponges were moved away to make the specimens air-dried for one week. Thus three weeks constituted one cycle of wetting and drying [43].The test specimens were fully immersed in a pool filled with a 3.5%~ 5% NaCl rich solution to accelerate chloride ingress after four wetting-drying cycles. Test specimens were subjected to one-month fully immersion period followed by one-month air-drying period.…”

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Probabilistic analysis of chloride penetration in reinforced concrete subjected to pre-exposure static and fatigue loading and wetting-drying cycles

Wang

Bastidas‐Arteaga

Gao

2018

Engineering Failure Analysis

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analysis of chloride penetration in reinforced concrete subjected to pre-exposure static and fatigue loading and wetting-drying cycles. Engineering Failure Analysis, Elsevier, 2017Elsevier, , 10.1016Elsevier, /j.engfailanal.2017 1 Please cite this paper as: Wang XH, Bastidas-Arteaga E. Gao Y. (2017). Probabilistic analysis of chloride penetration in reinforced concrete subjected to pre-exposure static and fatigue loading and wetting-drying cycles. Engineering Failure Analysis. In press https://doi.org/10. 1016/j.engfailanal.2017.11.008 Probabilistic analysis of chloride penetration in reinforced concrete subjected to pre-exposure static and fatigue loading and wetting-drying cycles AbstractReinforced concrete (RC) structures are subjected to environmental actions and loading that could significantly affect their serviceability and safety. Among these actions these paper focuses on the interaction between concrete cracking produced by static and fatigue loading and chloride ingress. Given the complexity of the problem and its related uncertainties, we carried out an experimental study that provided information for the probabilistic characterization of chloride ingress model parameters by accounting for static and fatigue loading effects. In the experimental part of the study RC specimens (beams) were subjected to pre-exposure loading and wetting-drying chloride exposure. At the end of the simulated chloride environmental attack, ϕ100×120-mm cylinders were drilled out from the bottom side of the central zone of the beams and used to measure chloride profiles within the concrete cover. The probabilistic analysis of test results showed that static and fatigue loading increases both the mean and standard deviation of chloride content for concrete depths larger than 15 mm. In order to evaluate the effect of loading on modeling chloride ingress processes, experimental data was used to fit the surface chloride concentration and the chloride diffusion coefficient for an analytical chloride ingress model as random variables. The identified random variables are then used to determine the distribution of the time to corrosion initiation for the present experimental configuration and to evaluate the long-term probability of corrosion initiation for other environmental exposures and cover configurations. The overall results confirm that considering pre-exposure loading conditions has an important effect in lifetime assessment. This effect depends on the aggressiveness of the surrounding environment. Keywords: pre-exposure loads and wetting/drying cycle; reliability; chloride-induced corrosion; random variable identification; reinforced concrete IntroductionOne of the main causes of reinforced concrete (RC) deterioration is the corrosion of the reinforcing bars due to chloride ingress from the surrounding environment [1]. Chloride-induced corrosion leads to loss of cross-section of reinforcing bars, loss of bond between steel and concrete [2,3] and concrete cracking [4,5]. These deterioration effects produce a significan...

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Section: Experimental Procedures and Methodsmentioning

confidence: 99%

“…Two weeks later, the plastic sheets and sponges were moved away to make the specimens air-dried for one week. Thus three weeks constituted one cycle of wetting and drying [43].…”

Section: Chloride Exposure Conditionsmentioning

confidence: 99%