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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/51885

Title: A Study of The Bond Degradation of Rebar Due to Cathodic Protection Current
Authors: 張建智
Contributors: 國立臺灣海洋大學:河海工程學系
Keywords: Bond strength
Cathodic protection
Polarization time
Degradation
Date: 2002-10
Issue Date: 2019-01-03T03:04:54Z
Publisher: Cement and Concrete Research
Abstract: Abstract: Bond degradation of rebar embedded in concrete due to impressed cathodic protection current was studied and is reported in this paper. Different mix designs of concrete are found to have influence on the degradation percentage of bond strength. More specifically, bond strength degradation percentage with higher water-to-cement (w/c) ratio is found to be larger than that with lower w/c ratio. The microstructure scanning electron microscope (SEM) photos of the concrete near the rebar–concrete interface showed that a loose structure with larger microvoids existed in the interface zone. Further, microhardness tests on the concrete near the interface and chemical titration to determine contents of potassium and sodium ions were performed to ensure that the main cause of bond degradation is the softening effect of concrete. A unified parameter, which combined the effects of cathodic current density and polarization time, is used to build up the relationship between experimental data. This concept allows engineers to quickly obtain design information from the experimental data of accelerated tests.
Relation: 32(4) pp.657-663
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/51885
Appears in Collections:[河海工程學系] 期刊論文

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