Forum for National Committees
Spotlight on young professionals
- The Andorra Congress: First glimpse of the technical content - Didier Giloppé
- The effects of climate change on winter service in Germany - Peter Hoffmann, Hermann Österle and Friedrich-Wilhelm Gerstengarbe, Christian Holldorb, Franziska Rumpel
- A benefit-cost approach to level of service standards for winter road maintenance - Max Perchanok, Heather McClintock, Liping Fu, Lalita Thakali, Tina Greenfield Huitt
- Improving the resilience of the United Kingdom's road network to the impact of severe winter weather - Matthew Lugg
- Sapporo winter road management plans - YasuhiroTakamatsu, Takuji Umezawa
- Materials and technologies for winter road maintenance in Lithuania - Matas Bulevičius, Darjusas Mučinis, Donatas Čygas, Alfredas Laurinavičius, Audrius Vaitkus
- Traffic ability of heavy vehicles on an incline - Torgeir Vaa, Per Brandli
- Challenges related to winter operations in urban highway tunnels - Alexandre Debs
- Assessment and repair of bridges subjected to de-icing salts - Ulrik Sloth Andersen, Henrik Nielsen
Assessment and repair of bridges subjected to de-icing salts
Illustrations © Ramboll Denmark A/S
Many highway bridges in Denmark were constructed during the period from 1960 to 1980. Most of the bridges were built from reinforced concrete, often using aggregates sensitive to alkali-silica reactions (ASR).
The average temperature is close to 0°C in December, January and February, thus leading to many days with frost and a heavy usage of de-icing salts, the use of which in Denmark (43,000 km2) is approximately 300,000 ton per year.
This paper presents cases where reinforced concrete (RC) and post-tensioned bridges have undergone major rehabilitation in order to halt the deterioration (corroded reinforcement and aggravated alkali-silica-reactions) primarily caused by de-icing salts.