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Pro047

Chloride deposition rate in wet candle device as an environmental indicator to concrete durability study



Author(s): G.R. Meira, C. Andrade, I.J. Padaratz, C. Alonso, J.C. Borba Jr.
Paper category: Workshop
Book title: International RILEM Workshop on Performance Based Evaluation and Indicators for Concrete Durability
Editor(s): V. Baroghel-Bouny, C. Andrade, R. Torrent, K. Scrivener
ISBN: 978-2-912143-95-2
Pages: 241 - 248
Total Pages: 8
Language: English


Abstract: Durability of concrete structures under marine environments is a matter that has been studied for a long time. This work was focused in marine atmosphere zone and studied the deposition of chlorides in wet candle devices and its relation with chlorides accumulated in concrete. As an environmental characterization, besides deposition of chlorides, climatic parameters were also monitored. To study chlorides transport in concrete, concrete specimens with three different mixtures were exposed at places located at four different distances from the sea. Periodically, chloride profiles were obtained and analysed with environmental data. Results show that there is a strong decrease on chlorides presence in marine atmosphere zone in the first meters away from the sea. There is also a good agreement between chlorides accumulated in concrete and those deposited in the wet candle device, following a relation based on square root of accumulated deposition of chlorides. On the other hand, chloride deposition rate in wet candle device can be an environmental indicator in concrete durability study, setting minimum requirements to concrete structures depending on deposition level expected.


Online publication: 2007
Publication Type: full_text
Public price (Euros): 0.00