Corrosion of Steel Prestressing Reinforcement - The Influence of the Used Construction Technology of Concrete Suspension Footbridges

Abstract

Stainless steel reinforcement in the form of prestressing wires and ropes, commonly used to reinforce prestressed concrete structures [1], is also used for suspension strips of footbridge bridges. After the accident of some of them, these structures became the subject of an examination of their current state and analyses of the origin and development of corrosion of the prestressing reinforcement used. The issue of the service life of prestressed structures is related, among other things, to their structural arrangement and the construction procedure used. As with most existing prestressed structures, the anti-corrosion protection of the reinforcement has traditionally been ensured primarily by the alkalinity of the environment, ie by concreting or grouting prestressed elements in the pipeline [2].