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    Field measurements of 42 in-service reinforced concrete bridges in coastal environments of Southeast China, covering a wide range of service year, span length, and concrete mixture, were carried out to investigate the chloride penetration. A modified chloride diffusion model was then proposed, taking into consideration a range of influencing factors including ambient temperature, relative humidity, stress state, carbon dioxide, chloride binding, and ageing. Verification of the modified model with field measurement data was performed. The sensitivity of the chloride diffusion to variations of each parameter was discussed in detail eventually. Chloride-induced corrosion of reinforcing steel is the main issue affecting the durability of reinforced concrete RC structures in coastal environments [ 1 , 2 ].
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    Chloride Penetration in Coastal Concrete Structures: Field Investigation and Model Development

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    One of the factors that affect the concrete structures durability is the corrosion in reinforcement steel. This phenomenon does not occur because of the physical and chemical protection that concrete offers. Among the factors that cause the degradation of reinforced concrete, the ingress of chloride ions stands out. This phenomenon reproduction in laboratory is difficult because of its time for natural occurrence. Therefore, researchers created tests that accelerate the ingress of ions inside concrete in order to simulate how this process will occur in real situations. The Salt Spray test, showed by ASTM B standard, is one of these tests, which has been widely utilized in the analysis of metal materials, but it is rare in concrete.
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    Verifying chloride penetration in concrete test samples partially immersed in seawater in Recife, Pernambuco. Abstract: The objective of this research is to analyze, through chemical tests, the quantity of chloride ions in concretes made from different traces proportions of materials in their depths. Laboratory tests were performed and test samples were made partially immersed in seawater, according to standards and the Mohr method.
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