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Author Shi, Xianming
Source SpringerLink
Content type Text
Publisher Higher Education Press
File Format PDF
Copyright Year ©2016
Language English
Subject Domain (in DDC) Technology ♦ Engineering & allied operations
Subject Keyword arc sprayed Zn ♦ anode replacement ♦ reinforced concrete ♦ bridge preservation ♦ neural networks ♦ surface profile ♦ Civil Engineering ♦ Cities, Countries, Regions
Abstract Arc sprayed zinc (Zn) anode on concrete surfaces has been an emerging technology for protecting reinforced concrete structures from rebar corrosion in coastal environments. Many cathodic protection (CP) systems with arc sprayed Zn anodes will reach or exceed their design life in the near future and thus may function improperly or insufficiently, making it necessary to replace the aged anodes. However, prior to this study, little was known about the most effective profile for the concrete surface, for either new concrete or old concrete with existing Zn anodes removed. This work develops criteria to properly prepare the concrete surface before the application of new Zn anode. Experimental studies were conducted both in the laboratory and for a field structure in Oregon. Artificial neural network was used to achieve better understanding of the complex cause-and-effect relationships inherent in the Zn-mortar or Zn–concrete systems and was successful in finding meaningful, logical results from the bond strength data. The goal is to achieve strong initial bond strength of new Zn to concrete, which is essential for long-term performance of the CP system. The results from this case study suggest that it is necessary to adjust the anode removal and surface sandblasting based on the electrochemical age of the existing concrete. In all cases of sandblasting, minimize the exposure of large aggregates (e.g., those bigger than 19 mm in diameter).
ISSN 20952430
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2016-01-21
Publisher Institution Chinese Universities
Publisher Place Beijing
e-ISSN 20952449
Journal Frontiers of Architecture and Civil Engineering in China
Volume Number 10
Issue Number 1
Page Count 11
Starting Page 1
Ending Page 11

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Source: SpringerLink