ABSTRACT

ABSTRACT: The Faro Bridges (1985) were constructed using state-of-the-art concrete technology, using dense concrete with high quality materials and using state-of-the-art production and curing technology. In the late 80’ies dust samples were taken and analysed for chloride content. The chloride ingress was somewhat higher than expected. This lead to a number of concrete investigations with the purpose of assessing the time dependent corrosion risk due to chloride penetration. Partly due to the very extensive data basis, the Faro Bridges have also been in front adopting the probability-based methods for maintenance management. As early as 1996 the first evaluations, taking the uncertainties into account, were carried out. Since then the data basis has grown significantly and in 2005 a probability-based evaluation of the residual service life has been carried out. The paper presents the extensive data basis and demonstrates how the information has been included in the probability-based plan for maintenance management. Further the benefits for the bridge owner are highlighted.