A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Cathodic Protection Field Trials on Prestressed Concrete Components
This is the Interim Report in a study to demostrate the feasibility of using cathodic protection (CP) on concrete bridge structures containing prestressed steel. Past laboratory and test yard studies had indicated that overprotection could result in the evolution of atomic hydrogen and the embrittlement of prestressing steel. Systems utilizing catalyzed titanium mesh, conductive rubber, and arc-sprayed zinc anodes were installed on prestressed pilings and girders of the Howard Frankland Bridge in Tampa, Florida; and systems using flame-sprayed zinc and conductive paint anodes were installed on the soffit of prestressed box beams of the Abbey Road and West 130th Street bridges near Cleveland, Ohio. The installation of all systems went well, with two exceptions. A strong October storm caused damage to the substructure and CP systems installed on the Howard Frankland Bridge, and leaking joints on the Ohio bridges caused construction delays and additional work. The three zones using zinc anodes were all started up in sacrificial mode, but after a few months on-line, polarization of the steel in these zones was inadequate, and operation will be switched to impressed current in the near future.
Cathodic Protection Field Trials on Prestressed Concrete Components
This is the Interim Report in a study to demostrate the feasibility of using cathodic protection (CP) on concrete bridge structures containing prestressed steel. Past laboratory and test yard studies had indicated that overprotection could result in the evolution of atomic hydrogen and the embrittlement of prestressing steel. Systems utilizing catalyzed titanium mesh, conductive rubber, and arc-sprayed zinc anodes were installed on prestressed pilings and girders of the Howard Frankland Bridge in Tampa, Florida; and systems using flame-sprayed zinc and conductive paint anodes were installed on the soffit of prestressed box beams of the Abbey Road and West 130th Street bridges near Cleveland, Ohio. The installation of all systems went well, with two exceptions. A strong October storm caused damage to the substructure and CP systems installed on the Howard Frankland Bridge, and leaking joints on the Ohio bridges caused construction delays and additional work. The three zones using zinc anodes were all started up in sacrificial mode, but after a few months on-line, polarization of the steel in these zones was inadequate, and operation will be switched to impressed current in the near future.
Cathodic Protection Field Trials on Prestressed Concrete Components
J. E. Bennett (author) / T. J. Schue (author)
1995
80 pages
Report
No indication
English
Cathodic protection for prestressed concrete structures
| Online Contents | 1998
Cathodic protection for prestressed concrete structures
| British Library Conference Proceedings | 1998