Deterioration of concrete structures due to salt crystallization; influence of salt types and relative humidity

Author(s): Jan Sælensminde, S.M Samindi M.K Samarakoon
Paper category: Proceedings
Book title: Proceedings on International RILEM Conference on Materials, Systems and Structures in Civil Engineering Conference segment on Moisture in Materials and Structures
Editor(s): Kurt Kielsgaard Hansen, Carsten Rode and Lars-Olof Nilsson
ISBN: 978-2-35158-178-0
e-ISBN: 978-2-35158-179-7
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 120 - 127
Total Pages: 8
Language : English

Abstract: Surface scaling/spalling of concrete due to salt crystallization is a form deterioration, which affect the durability of concrete surfaces periodically exposure to seawater or water containing different salts. In nature, salts will accumulate on surfaces exposed to salt solutions where water can evaporate and leaving the salts at and beneath the surface. Such situations can be arise in tunnel liners, docks, reinforced concrete columns/piers etc. in which a part of the concrete surface in salt ions and other parts are exposed to warm air (evaporation). This deterioration looks similar to deterioration due to freezing and thawing damage but mechanism is different. One of the challenges is to understand the mechanism of migration of salt into concrete and crystallization of salts within porous materials. This paper discusses the various possible mechanisms in literature on salt crystallization. In addition, this paper particularly looks into the mechanisms of crystallization of different salts and how different salts can govern the hygroscopic conditions depending on the temperature and the relative humidity in the enclosed surrounding environment.

Online publication : 2016
Publication type : full_text
Public price (Euros) : 0.00

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