The rehabilitation project for Corridor VIII, financed by the European Union, aims, among other objectives, to rehabilitate the Durrës–Rrogozhinë–Lin (Pogradec) railway line toward Albania’s border with North Macedonia. Within the rehabilitation of this railway system, in recent years the task has arisen to assess the current condition of the structures (bridges), since investment decisions are based on their present state. As part of this project, a condition assessment of the bridges on the Rrogozhinë–Pogradec line was carried out on behalf of the European investors. Among the tests performed was the assessment of corrosion risk for the metallic elements—the reinforcing bars of the reinforced-concrete bridge structures. The testing was conducted by the Nord-Comat Laboratory, Tirana. Because of the mountainous terrain, bridges constitute an important part of the railway infrastructure. These bridges are built of reinforced concrete with steel bars, known as reinforced-concrete structures. This composite consists of the matrix—concrete—and the reinforcement—steel bars. The reinforcement essentially addresses concrete’s relatively low tensile strength and low ductility in structural applications. The corrosion resistance of these bars depends on many factors: their chemical and mechanical properties, the manufacturing method and the concreting technique, as well as design and production provisions intended to mitigate corrosion damage from the outset. This paper presents the measurement and evaluation of corrosion risk using the electrochemical galvanic-couple method for a specific structural element (bridge pier) typical of a railway bridge.

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Study of the Condition of Steel Reinforcing Bars in the Reinforced-Concrete Structures of the Rrogozhinë–Pogradec Railway Bridges, Albania

  • Enes Abazi,
  • Indrit Vozga,
  • Vladimir Kasemi

摘要

The rehabilitation project for Corridor VIII, financed by the European Union, aims, among other objectives, to rehabilitate the Durrës–Rrogozhinë–Lin (Pogradec) railway line toward Albania’s border with North Macedonia. Within the rehabilitation of this railway system, in recent years the task has arisen to assess the current condition of the structures (bridges), since investment decisions are based on their present state. As part of this project, a condition assessment of the bridges on the Rrogozhinë–Pogradec line was carried out on behalf of the European investors. Among the tests performed was the assessment of corrosion risk for the metallic elements—the reinforcing bars of the reinforced-concrete bridge structures. The testing was conducted by the Nord-Comat Laboratory, Tirana. Because of the mountainous terrain, bridges constitute an important part of the railway infrastructure. These bridges are built of reinforced concrete with steel bars, known as reinforced-concrete structures. This composite consists of the matrix—concrete—and the reinforcement—steel bars. The reinforcement essentially addresses concrete’s relatively low tensile strength and low ductility in structural applications. The corrosion resistance of these bars depends on many factors: their chemical and mechanical properties, the manufacturing method and the concreting technique, as well as design and production provisions intended to mitigate corrosion damage from the outset. This paper presents the measurement and evaluation of corrosion risk using the electrochemical galvanic-couple method for a specific structural element (bridge pier) typical of a railway bridge.