Journal ArticleDOI
Parameters influencing corrosion and tension capacity of post-tensioning strands
TLDR
In this paper, a 12-month long strand corrosion test program with 298 specimens was conducted to identify and quantify parameters influencing corrosion and tension capacity of strands in post-tensioned bridges.Abstract:
A 12-month long strand corrosion test program with 298 specimens was conducted to identify and quantify parameters influencing corrosion and tension capacity of strands in post-tensioned bridges. The parameters investigated were grout class, moisture content, chloride concentration, void type, and stress level. The test specimens were 41 in. (1041 mm) long, in unstressed or stressed conditions, partially or completely embedded in cementitious grout, and exposed to various environmental conditions representing possible field conditions. After the exposure period, the grout material was removed and the strand surfaces were cleaned and visually evaluated for corrosion damage. The tension capacities of the strands were then determined. Results indicate that the corrosion was most severe at or near the grout-air-strand (GAS) interface. Corrosion evaluation and statistical analysis of the strand tension capacity results show that orthogonal, inclined, and bleedwater void conditions caused more corrosion and tension capacity loss than parallel and no-void conditions. The change in grout class did not result in statistically significant changes in the tension capacity of the strand samples evaluated. Statistically significant changes in tension capacity were observed with changes in the GAS interface, stress level, moisture content, and chloride concentration.read more
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Journal ArticleDOI
Rebar corrosion detection, protection, and rehabilitation of reinforced concrete structures in coastal environments: a review
Amala James,Ehsan Bazarchi,A.A. Chiniforush,Parinaz Panjebashi Aghdam,M. Reza Hosseini,Ali Akbarnezhad,Igor Martek,Farzad Ghodoosi +7 more
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Early Corrosion Detection in Prestressed Concrete Girders Using Acoustic Emission
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Journal ArticleDOI
Seismic fragility estimates for corroding reinforced concrete bridges
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Journal ArticleDOI
Performance of Corroded Reinforced Concrete Columns under the Action of Eccentric Loads
TL;DR: In this paper, the performance of RC columns with corroded reinforcing steel bars was investigated under eccentric-compressive loading, from which the residual strength of the columns was obtained and relationships between the average cross-sectional area loss of the steel bar, the average and maximum crack widths of concrete cover, and the strength loss of RC column were examined.
Journal ArticleDOI
Effect of insufficient grouting and strand corrosion on flexural behavior of PC beams
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