Journal Article10.1016/j.cemconcomp.2022.104511
Experimental and theoretical investigation of chloride ingress into concrete exposed to real marine environment
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TL;DR: In this article , a modified time-dependent prediction model of chloride ingress into concrete was established and validated by considering the time-dependency effect of material and environmental factors, and the results indicated that the predicted chloride profiles were in good agreement with the results of the real marine exposure test.
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Abstract: Chloride-induced corrosion is a critical issue that influences the durability and mechanical performance of reinforced concrete (RC) structures exposed to marine tidal and splash environments. This paper presents an experimental and theoretical investigation on the chloride transport behavior in concrete exposed to an aggressive marine environment for up to 720 days. Field exposure tests were performed in marine tidal and splash zones, and free chloride concentration profiles for different types of concrete after several exposure times, i.e. 90, 180, 360 and 720 days, were obtained. The effects of the water-to-cement ratio, binder type, exposure environment and exposure time on the time dependency of the chloride diffusion coefficient (D) and surface chloride concentration (Cs) were analyzed and discussed. Based on the obtained results, a modified time-dependent prediction model of chloride ingress into concrete was established and validated by considering the time-dependency effect of material and environmental factors. The results indicate that the comparisons of the predicted chloride profiles using the developed time-dependent prediction model were in good agreement with the results of the real marine exposure test.
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References
Factors influencing chloride transport in concrete structures exposed to marine environments
TL;DR: In this paper, a literature review regarding chloride transport in terms of the diffusion coefficient (D ) and surface chloride content (C S ) in concrete structures exposed to a marine environment is presented.
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On the mathematics of time-dependent apparent chloride diffusion coefficient in concrete
Tang Luping,Joost Gulikers +1 more
TL;DR: In this article, the authors provided an improved mathematical analysis of chloride penetration into concrete employing a time-dependent diffusion coefficient for the solution of Fick's second law of diffusion. But the results from this mathematical analysis demonstrate that some models based on the oversimplified error function complement (ERFC) solutions may easily overestimate the service life by orders of magnitude, especially when the age factor is high.
402
Influence of freeze-thaw cycles on capillary absorption and chloride penetration into concrete
TL;DR: In this article, the influence of freeze-thaw cycles on capillary water absorption and chloride penetration into ordinary concrete with two different water-cement ratios and air-entrained concrete was investigated.
384
Transport Properties of Engineered Cementitious Composites under Chloride Exposure
TL;DR: In this paper, the results of an experimental investigation on the chloride transport properties of engineered cementitious composites (ECC) under combined mechanical and environmental loads were presented, and the results showed that ECC is a newly developed, high-performance, fiber-reinforced cementitious composite with substantial benefit in both high ductility and improved durability due to tight crack width.
331
A review on the deterioration and approaches to enhance the durability of concrete in the marine environment
TL;DR: In this article, a review of the deterioration of concrete under seawater attack with particular interests in field exposure is presented, and the protocols to enhance the durability performance of marine concrete are also reviewed, such as using supplementary cementitious materials (SCMs) to mitigate rate of chloride penetration and, more promisingly, to use alternative binder systems.
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