Over het archief
Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.
Dit archief wordt uitgebouwd en beheerd volgens de principes van de Open Access Movement, en het daaruit ontstane Open Archives Initiative.
Basisinformatie over ‘Open Access to scholarly information'.
| one publication added to basket [242583] |
Effect of temperature on transport of chloride ions in concrete
Yuan, Q.; Shi, C.; De Schutter, G.; Audenaert, K. (2009). Effect of temperature on transport of chloride ions in concrete, in: Alexander, M.G. et al. (Ed.) Concrete Repair, Rehabilitation and Retrofitting II. pp. 345-351
In: Alexander, M.G. et al. (Ed.) (2009). Concrete Repair, Rehabilitation and Retrofitting II. CRC Press/Balkema: Leiden. ISBN 9780415468503. 476 pp., meer
|
| Beschikbaar in | Auteurs |
|
Documenttype: Congresbijdrage
|
| Auteurs | | Top |
- Yuan, Q.
- Shi, C.
- De Schutter, G., meer
- Audenaert, K., meer
|
|
|
| Abstract |
Chloride-induced corrosion is the major durability issue of reinforced concrete structures along seacoast and in cold areas where de-icing salts are used. Various service life prediction models based on chloride induced corrosion have been developed. Temperature plays an important role in modeling chloride transport in cement-based materials. However, it is often overlooked. In this paper, the effect of temperature on non-steady-state migration and diffusion coefficients of chloride ion in concrete with water-to-cement ratios of 0.35, 0.48 and 0.6 were investigated. Non-steady-state migration coefficient was measured at 20°C adn 5°C following NT build 492. Non-steady-state diffusion coefficient was measured at 5°C, 20°C and 40°C according to NT build 443. The effect of temperature on migration/diffusion coefficient is examined by using Arrhenius Equation. The results show that higher temperatures result in higher diffusion/migration coefficients. Temperatures alter the chloride penetration depth, but not the trend of chloride profile. The activation energy obtained from non-steady-state migration coefficient is quite comparable to Samson and Marchand’s results (Cement and Concrete Research, V37, 2007, 455-468), which is around 20 kJ/mol, and independent of water-to-cement ratio. However, the activation energy obtained from non-steady-state diffusion tests ranges from 17.9 to 39.9 kJ/mol, which seems dependent on water-to-cement ratio. The surface chloride concentration is also affected by water-to-cement ratio and temperature. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
