Masters Theses
Abstract
"This study involved the spalling problem found in some partial-depth precast prestressed bridge decks in the state of Missouri. Recently, panels of several bridges have exhibited corrosion of the prestressing steel tendons causing concrete spalling at the edges of panels. Some of the exposed tendons are corroded to the point of rupture. The effect of factors, namely concrete side edge distance and concrete material type, on steel corrosion in chloride-contaminated reinforced concrete was investigated in this study. Wet-dry cycle tests and accelerated corrosion tests were carried out on sixty-three specimens designed with three different side edge distances and three different concrete mixture types. Visual inspection and gravimetric study were performed on all test specimens. For specimens subjected to wet-dry cycle test, corrosion potential measurement, electrical resistivity measurement, and chloride content analysis were also conducted. For specimens subjected to accelerated corrosion test, time from corrosion initiation to corrosion cracking was used to verify the effectiveness of various models in predicting cracking time with low impressed current. Findings indicate that, for specimens of constant thickness, concrete deterioration and tendon corrosion decreased as the side edge distance increased. In addition, experimental results showed little difference in deterioration levels between specimens of concrete with fibers and the control specimens with normal concrete. Higher levels of deterioration were found in specimens with corrosion inhibitor compared to the control specimens with normal concrete"--Abstract, page iii.
Advisor(s)
Sneed, Lesley
Committee Member(s)
LaBoube, Roger A.
Volz, Jeffery S.
Department(s)
Civil, Architectural and Environmental Engineering
Degree Name
M.S. in Civil Engineering
Sponsor(s)
Missouri. Department of Transportation
Publisher
Missouri University of Science and Technology
Publication Date
Spring 2012
Pagination
xv, 107 pages
Note about bibliography
Includes bibliographical references (pages 139-143).
Geographic Coverage
Missouri
Rights
© 2012 Dayi Zhang, All rights reserved.
Document Type
Thesis - Open Access
File Type
text
Language
English
Subject Headings
Concrete bridges -- Floors -- Corrosion -- MissouriTendons (Prestressed concrete) -- Corrosion
Thesis Number
T 9949
Print OCLC #
794689666
Electronic OCLC #
752530189
Recommended Citation
Zhang, Dayi, "Effect of side edge distance and concrete materials on corrosion in precast prestressed concrete panels" (2012). Masters Theses. 5005.
https://scholarsmine.mst.edu/masters_theses/5005