A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
One of the most serious and costly problems presently facing highway agencies is premature deterioration of concrete bridge decks. The cause has now been linked to deicing chemical 'chloride' induced corrosion of the reinforcement. In some cases bridge decks designed to last 40 years have required major repairs after only 10 years of service due to corrosion related 'chuckholing' or spalling. Mn/DOT has become increasingly aware of this problem during the last 5 years and has initiated a comprehensive program to resolve it. The two basic approaches to solving the problem are to: (1) Keep the salt and moisture out of the decks with protective overlays and membranes, modified concretes or sealers; (2) Protect the steel from corrosion once the concrete's protective nature has been destroyed by chloride contamination, using epoxy and zinc coatings. Bridge decks were constructed or reconstructed using protective membranes, modified concretes and coated bars. Testing and evaluation consists of visual observations, delamination detection, chloride content testing, depth of concrete cover over rebars and electrical potential measurement.
One of the most serious and costly problems presently facing highway agencies is premature deterioration of concrete bridge decks. The cause has now been linked to deicing chemical 'chloride' induced corrosion of the reinforcement. In some cases bridge decks designed to last 40 years have required major repairs after only 10 years of service due to corrosion related 'chuckholing' or spalling. Mn/DOT has become increasingly aware of this problem during the last 5 years and has initiated a comprehensive program to resolve it. The two basic approaches to solving the problem are to: (1) Keep the salt and moisture out of the decks with protective overlays and membranes, modified concretes or sealers; (2) Protect the steel from corrosion once the concrete's protective nature has been destroyed by chloride contamination, using epoxy and zinc coatings. Bridge decks were constructed or reconstructed using protective membranes, modified concretes and coated bars. Testing and evaluation consists of visual observations, delamination detection, chloride content testing, depth of concrete cover over rebars and electrical potential measurement.
Bridge Deck Deterioration and Restoration
R. G. Tracy (author)
1976
106 pages
Report
No indication
English
Highway Engineering , Construction Equipment, Materials, & Supplies , Corrosion & Corrosion Inhibition , Bridge decks , Corrosion prevention , Protective coatings , Coverings , Membranes , Concrete pavements , Reinforcing steels , Deicers , Chlorides , Spalling , Bitumens , Waterproof coatings , Epoxy coatings , Zinc coatings , Electric potential , Performance evaluation
Bridge Deck Deterioration and Restoration
| NTIS | 1982
Bridge Deck Deterioration Study
| NTIS | 1975
Bridge Deck Deterioration Study
| NTIS | 1973
Detection of Bridge Deck Deterioration
| NTIS | 1972
Chlorides and Bridge Deck Deterioration
| NTIS | 1969