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Chloride penetration by cyclic immersion of selfcompacting concrete
The service life of concrete structures in a marine environment is mainly influenced by the resistance of the concrete to chloride penetration. From the moment these ions are reaching the reinforcing steel in the concrete, corrosion can start. Chloride ions are penetrating most quickly in the tidal /one due to the capillary absorption of sea water containing chlorides. In order to study the penetration of chlorides in the tidal zone, an experimental set up was built in the Magnel Laboratory for Concrete Research. In this testing device, concrete specimens are immersed in a chloride containing solution during 20 minutes, followed by 40 minutes of drying. In this paper the test results of 16 SCC and 4 traditional concrete mixtures, will be discussed. Four types of cement (portland cement and blast furnace slag cement), three types of filler (fly ash and two types of limestone filler with a different grading curve) and two types of coarse aggregate are used and the influence of the amount of powder and the amount of water is studied. A model, based on capillary absorption tests and chloride migration tests, is proposed, leading to a good estimation of the chloride penetration depth.
Chloride penetration by cyclic immersion of selfcompacting concrete
The service life of concrete structures in a marine environment is mainly influenced by the resistance of the concrete to chloride penetration. From the moment these ions are reaching the reinforcing steel in the concrete, corrosion can start. Chloride ions are penetrating most quickly in the tidal /one due to the capillary absorption of sea water containing chlorides. In order to study the penetration of chlorides in the tidal zone, an experimental set up was built in the Magnel Laboratory for Concrete Research. In this testing device, concrete specimens are immersed in a chloride containing solution during 20 minutes, followed by 40 minutes of drying. In this paper the test results of 16 SCC and 4 traditional concrete mixtures, will be discussed. Four types of cement (portland cement and blast furnace slag cement), three types of filler (fly ash and two types of limestone filler with a different grading curve) and two types of coarse aggregate are used and the influence of the amount of powder and the amount of water is studied. A model, based on capillary absorption tests and chloride migration tests, is proposed, leading to a good estimation of the chloride penetration depth.
Chloride penetration by cyclic immersion of selfcompacting concrete
Audenaert, Katrien (author) / Schutter, Geert de (author)
2007
6 Seiten, 1 Bild, 2 Tabellen, 9 Quellen
Conference paper
English
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