Self-Terminated Carbonation Model as an Useful Support for Durable Concrete Structure Designing
Piotr Paweł Woyciechowski , Joanna Julia Sokołowska
AbstractThe paper concerns concrete carbonation, the phenomena that occurs in every type of climate, especially in urban-industrial areas. In European Standards, including Eurocode (EC) for concrete structures the demanded durability of construction located in the conditions of the carbonation threat is assured by the selection of suitable thickness of reinforcement cover. According to EC0 and EC2 the thickness of the cover in the particular class of exposure depends only on the structure category and concrete strength class – it is not differentiated for various cements, nor additives, nor technological types of concrete. As a consequence the selected thickness of concrete cover is in fact a far estimation – sometimes too exaggerated (too safe or too risky). The paper presents the elaborated “self-terminated carbonation model” that includes abovementioned factors and enables to indicate the maximal possible depth of carbonation. This is possible because presented model is a hyperbolic function of carbonation depth in time (the other models published in the literature use the parabolic function that theoretically assume the infinite increase of carbonation depth value). The paper discusses the presented model in comparison to other models published in the literature, moreover it contains the algorithm of concrete cover design with use of the model as well as an example of calculation of the cover thickness
|Publication size in sheets||0.75|
|Book||Chang-Koon Choi (eds.): World Congress on Advances in Civil, Environmental, and Materials Research. ACEM. The 2016 Structures Congress (Structures16) , 2016, Int'l Associ tion of Structural Eng. & Mechanics (IASEM), ISBN 978-89-89693-42-0, 850 p.|
|Keywords in English||self-terminated carbonation model|
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