A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Service life of repaired concrete bridge decks
Pre-mature deterioration of reinforced concrete causesproblems world-wide and the search for reliable cost effectiveand environmental friendly repairs is intense. The service lifeof the repaired structure is important in order to establishthe annual cost and environmental impact for differentalternatives. This doctoral thesis focuses on the service lifeof concrete bridge decks repaired with bonded concreteoverlays. The approach was broad and based on the performanceof a number of bridge decks after approximately ten years inservice. The main aims were to establish the overall servicelife and to improve the design where improvements were needed.Efforts have been made to make the repairs as robust aspossible and the crucial production stage is always considered.The following parameters were investigated: Wear and rutting Bond strength and extent and cause of cracks Relative humidity and temperature in the deck Freeze-thaw resistance and number of freeze-thawcycles Concrete cover and service life criterion with respect tochloride initiated corrosion Service life predictions using moving boundarytheory Chloride concentrations in de-icing water and in thesurfaces of concrete overlays Absorption of water and chloride ions due to capillarysuction of de-icing water Chloride ingress in solid and cracked parts of bondedconcrete overlays The wear and rutting were found to be limited. The bondbetween new and old concrete was unaltered or increased afterten years in service. The cracking on the overlays wasgenerally limited. The main cracking causes were insufficientcuring and reflective cracking due to construction joints (coldcasting joints) in the old bridge deck. The cracks can beavoided or made non-hazardous with respect to corrosion andfreeze-thaw damages with simple measures. The chloride ingress was low in solid and limited in crackedparts of the overlay. Samples of concrete, snow, slush andwater were taken from the overlay during two years to quantifythe chloride concentrations and their variations. The ...
Service life of repaired concrete bridge decks
Pre-mature deterioration of reinforced concrete causesproblems world-wide and the search for reliable cost effectiveand environmental friendly repairs is intense. The service lifeof the repaired structure is important in order to establishthe annual cost and environmental impact for differentalternatives. This doctoral thesis focuses on the service lifeof concrete bridge decks repaired with bonded concreteoverlays. The approach was broad and based on the performanceof a number of bridge decks after approximately ten years inservice. The main aims were to establish the overall servicelife and to improve the design where improvements were needed.Efforts have been made to make the repairs as robust aspossible and the crucial production stage is always considered.The following parameters were investigated: Wear and rutting Bond strength and extent and cause of cracks Relative humidity and temperature in the deck Freeze-thaw resistance and number of freeze-thawcycles Concrete cover and service life criterion with respect tochloride initiated corrosion Service life predictions using moving boundarytheory Chloride concentrations in de-icing water and in thesurfaces of concrete overlays Absorption of water and chloride ions due to capillarysuction of de-icing water Chloride ingress in solid and cracked parts of bondedconcrete overlays The wear and rutting were found to be limited. The bondbetween new and old concrete was unaltered or increased afterten years in service. The cracking on the overlays wasgenerally limited. The main cracking causes were insufficientcuring and reflective cracking due to construction joints (coldcasting joints) in the old bridge deck. The cracks can beavoided or made non-hazardous with respect to corrosion andfreeze-thaw damages with simple measures. The chloride ingress was low in solid and limited in crackedparts of the overlay. Samples of concrete, snow, slush andwater were taken from the overlay during two years to quantifythe chloride concentrations and their variations. The ...
Service life of repaired concrete bridge decks
Paulsson-Tralla, Johatan (author)
1999-01-01
50
Theses
Electronic Resource
English
Service life prediction of concrete bridge decks repaired with bonded concrete overlays
| Springer Verlag | 2001
Service life prediction of concrete bridge decks repaired with bonded concrete overlays
| British Library Online Contents | 2001
Service life estimation of concrete bridge decks
| Springer Verlag | 2006
Determination of End of Functional Service Life for Concrete Bridge Decks
| British Library Online Contents | 1995