...Abstract Post-tensioning (PT) has evolved to become an important technology for affecting integrity of bridge structures. However, tendon failures resulting from wire/strand corrosion have been reported within two years of construction. In response to this, a recent study introduced and evaluated...

...Introduction Steel bridges represent more than 30% of the total number of highway bridges in the United States ¹ and Canada. Highway bridges currently utilize two types of steel, carbon based grades and weathering steel grades. They are predominantly constructed from steel...

... ( CR ) , and (3 T f (tendon  ) = 1.44 / μ ( CR ) . Abstract Post-tensioning (PT) has become an important technology for affecting integrity of large reinforced concrete structures, including bridges. While there are a number of advantages to PT construction compared...

... Construction Bridges Tanks Atmospheric corrosion Mechanical properties INTRODUCTION Duplex stainless steels have been actively developed by European companies since 1935. Their properties make them very attractive compared to equivalent austenitic grades: higher resistance to stress corrosion cracking...

...Abstract Post-tensioned (PT) concrete construction was first introduced over 60 years ago and has evolved to become a prime methodology for affecting integrity of large reinforced concrete structures, including bridges. While there are a number of advantages to PT construction compared...

... post-tensioning has evolved to become the construction method of choice for many structures, including bridges. However, instances of corrosion induced fracture of wires and strands and failure of tendons have occurred as a consequence of either chemically or physically deficient grout...

...Abstract The research initiative to be described relates to the concern of the current Mexican transportation agencies about infrastructure integrity particularly in the sector of highway bridges. We report analytical and field work on corrosion diagnosis, solution development, and monitoring...

... finite difference models, the results compared with the field measurements, and the utility of cathodic protection using SMgBAs alone projected. Reinforced concrete cathodic protection galvanic anode bridges substructure sea water finite difference modeling INTRODUCTION Sacrificial cathodic...

... not exceed 0.43%; M 0.10% is the maximum for sum total of all the grain elements such as V, Nb. Abstract Ministry of Transportation Ontario has been using weathering steel for bridge girders since1968. The main advantage of using weathering steel is that, under normal weathering cycles, it will form...

...INTRODUCTION Abstract Corrosion induced cracking, delamination, and spalling of prestressed coastal bridge pilings presents a formidable challenge to maintenance and maintenance planning, both in Florida and elsewhere. Particularly needed is a protocol whereby engineers can prioritize corrosion...

... with hydrogel adhesive, ⁹ 4) surface mounted penny and expanded Zn sheet, ^{4 , 10 , 11} 5) Zn mesh with fiberglass jacket, ¹² 6) Zn anode in chemically enhanced mortar. ¹³ While there have been studies and applications of GACP for bridge decks, ¹⁴...

...Abstract Reinforced concrete bridge substructures in Florida coastal waters have historically experienced deterioration as a consequence of embedded steel corrosion followed by concrete cracking and spalling. Galvanic anode cathodic protection (CP), as affected by thermally sprayed zinc for cast...

...Abstract Cathodic protection has become the preferred method for mitigating corrosion of steel reinforcement in concrete in Florida’s marine bridge substructures. Over the past twenty years, the Florida Department of Transportation (FDOT) has installed a variety of cathodic protection systems...

...Abstract Solvent-based acrylic carbon paint anodes were installed on the north approach spans of the Yaquina Bay Bridge (Newport OR) in 1985. The anodes continue to perform satisfactorily after more than 15 years service. The anodes were inexpensive to apply and field repairs are easily made...

... substructure conditions, even in the absence of chloride contamination of the concrete next to the rebar^{( 8 , 9 )}. Examination of the underside of coatings from numerous ECR samples from Florida bridges did not reveal any correlation between this disbondment and the usual forms of surface...

..., and rebar size and spacing. An experimental bridge built in West Conshohocken, Pennsylvania in 1973 was the first structure constructed using ECR. ¹ Between then and the time of an update report ^{2 , 3} in 1992, well over 100,000 structures were built in the United States using ECR...

... (1) Formerly, Graduate Research Assistant, Florida Atlantic University. PROCEDURE General Abstract Jacketing has been employed historically in Florida and elsewhere as a repair and rehabilitation method for corrosion damaged coastal bridge pilings. Such an approach involves either partial...

...Atmospheric Exposure Tests Copper mass loss samples were placed on the seven bridges and at the eleven communities shown on the Oregon map ( Figure 2 ). Prior to exposure, the mass loss samples were cleaned and degreased with methanol, dried, and weighed to 0.1 mg on an analytical balance...

...Arc-sprayed zinc has recently found favor as an anode on bridge substructures, principally because the zinc coating can be easily applied to the complex shapes of substructure surfaces. A survey conducted in 1994 identified 22 systems in 7 states and 2 countries using metallized zinc anodes on over...

... carried out independently and in collaboration with SHRP by Ontario Ministry of Transportations ⁸ . In the United Kingdom, there was considerable interest by the Department of Transport and its Highways Agency in the application of the technology to bridge substructures. There was particular...