Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Betoniteraesten kloridikorroosio ja katodinen suojaus. (Chloride corrosion of reinforcement and cathodic protection)
Chloride corrosion of steel in concrete may result in shortening of the service life or a premature, expensive renovation or even failure of the renovation, unless the factors of chloride corrosion are known. It is nowadays impossible to remove chlorides from concrete reliably without cutting out chloride contamined concrete layer. However, after the renovation concrete may often contain chlorides so much that corrosion of steel will start and the service life will shorten. The expected service life can be gained by renovating the structure so both the threshold value of chloride content (the value after corrosion starts) and speed of the corrosion process are taken into account in the plans. The other renovating method is cathodic protection to stop corrosion. In the beginning of the report, chloride corrosion of steel in concrete (not in cold climate) is given on the base of the literature references and experience of renovations. Influence of binding material of concrete to threshold value and to continuation of corrosion process are presented. The proposal to the binding material quality and the minimum content of binding material are given. The end of the report presents the prerequisites to cathodic protection and designing principles.
Betoniteraesten kloridikorroosio ja katodinen suojaus. (Chloride corrosion of reinforcement and cathodic protection)
Chloride corrosion of steel in concrete may result in shortening of the service life or a premature, expensive renovation or even failure of the renovation, unless the factors of chloride corrosion are known. It is nowadays impossible to remove chlorides from concrete reliably without cutting out chloride contamined concrete layer. However, after the renovation concrete may often contain chlorides so much that corrosion of steel will start and the service life will shorten. The expected service life can be gained by renovating the structure so both the threshold value of chloride content (the value after corrosion starts) and speed of the corrosion process are taken into account in the plans. The other renovating method is cathodic protection to stop corrosion. In the beginning of the report, chloride corrosion of steel in concrete (not in cold climate) is given on the base of the literature references and experience of renovations. Influence of binding material of concrete to threshold value and to continuation of corrosion process are presented. The proposal to the binding material quality and the minimum content of binding material are given. The end of the report presents the prerequisites to cathodic protection and designing principles.
Betoniteraesten kloridikorroosio ja katodinen suojaus. (Chloride corrosion of reinforcement and cathodic protection)
A. Meuronen (Autor:in) / E. Westerlund (Autor:in)
1992
45 pages
Report
Keine Angabe
Englisch
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