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96312 FIELD APPLICATION OF CATHODIC PREVENTION ON REINFORCED CONCRETE STRUCTURES

Product Number: 51300-96312-SG
ISBN: 96312 1996 CP
Author: Alberto Bazzoni, Bruno Bazzoni, Luciano Lazzari, Luca Bertolini, Pietro Pedeferri
Industry: Highways & Bridges
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This paper illustrates the results gained during the first three years of cathodic protection application to Frejus highway viaducts in northern Italy. CP applications deal with corrosion control of chloride contaminated structures (cathodic protection application properly said) and the corrosion prevention of new non-contaminated structures, constructed with incorporated cathodic protection systems (so-called cathodic prevention). Both normal and post-tensioned structures are present: in the latter case the problems connected with the risk of hydrogen embrittlement of the tendons are discussed. The paper illustrates also the computerized system for gathering and monitoring data and the criteria adopted to evaluate and control the cathodic protection and cathodic prevention conditions as well as to avoid overprotection. Keywords: Cathodic protection, cathodic prevention overprotection, hydrogen embrittlement, monitoring. reinforced concrete, post-tensioned concrete
This paper illustrates the results gained during the first three years of cathodic protection application to Frejus highway viaducts in northern Italy. CP applications deal with corrosion control of chloride contaminated structures (cathodic protection application properly said) and the corrosion prevention of new non-contaminated structures, constructed with incorporated cathodic protection systems (so-called cathodic prevention). Both normal and post-tensioned structures are present: in the latter case the problems connected with the risk of hydrogen embrittlement of the tendons are discussed. The paper illustrates also the computerized system for gathering and monitoring data and the criteria adopted to evaluate and control the cathodic protection and cathodic prevention conditions as well as to avoid overprotection. Keywords: Cathodic protection, cathodic prevention overprotection, hydrogen embrittlement, monitoring. reinforced concrete, post-tensioned concrete
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