Long-term durability of Danish bridges in marine environment
Microscopy investigations have been
carried out on concrete samples taken from a series of Danish coast
bridges with the purpose of studying the effects of long-term
exposure of concrete structures to a marine environment. The
following bridges were included in the investigations (Danish names
are given in brackets):
- Vejle Fjord Bridge (Vejlefjordbroen)
- Alssund Bridge (Alssundbroen)
- Farø Bridges (Farøbroerne)
- Storstrøm Bridge (Storstrømsbroen)
- Øresund Bridges (Øresundsbroen)
- Vilsund Bridge (Vilsundbroen)
- Oddesund Bridge (Oddesundbroen)
- Hadsund Bridge (Hadsundbroen)
Datasheets with microscopy
results
Results from the microscopy
investigations have been collected in datasheets containing data
obtained by optical microscopy, as well as scanning electron
microscopy (SEM) in combination with Energy-dispersive X-ray (EDX)
spectroscopy:
Danish bridges - Microscopy investigations
Chloride ingress in old
Danish bridges
The ingress of chloride in three
Danish coast bridges (Vejle Fjord Bridge, Alssund Bridge and the
Farø Bridges) has also been studied by means of chloride profiles
measured on concrete cores from submerged conditions. The sample
materials represent three different concrete types and exposure
times ranging from 30 to 34 years. A paper with results from these
investigations is currently under preparation, but preliminary
results can be found in the presentation below:
Long-term durability of concrete in marine
environment - Presentation from meeting with the referencegroup on
November 30, 2012