scholarly journals Corrosion propagation phase and bond strength degradation of reinforced concrete structures: State of the art

2017 ◽  
Vol 6 (3) ◽  
pp. 499-514 ◽  
Author(s):  
Nirosha D. Adasooriya ◽  
Samindi Samarakoon ◽  
Ove Tobias Gudmestad
Keyword(s):  
Reinforced Concrete ◽  
Bond Strength ◽  
State Of The Art ◽  
Concrete Structures ◽  
Strength Degradation ◽  
Reinforced Concrete Structures ◽  
Corrosion Propagation

Elektrochemische, zerstörungsfreie Prüfmethoden für Zustandsanalysen und Qualitätssicherung bei Instandsetzung von Stahlbetonbauten / Electrochemical non-destructive test methods for the assessment and quality control of restoration measures of reinforced concrete structures

1997 ◽  
Vol 3 (6) ◽  
pp. 581-602
Author(s):  
H. Wojtas
Keyword(s):  
Quality Control ◽  
Reinforced Concrete ◽  
State Of The Art ◽  
Concrete Structures ◽  
Test Methods ◽  
Reinforced Concrete Structures ◽  
Potential Mapping ◽  
Concrete Resistivity ◽  
Non Destructive ◽  
Restoration Measures

Abstract In this state of the art report the electrochemical, non destructive techniques for the survey, assessment and the quality control of reinforced concrete structures such as the potential mapping, the measuring of concrete resistivity and the polarisation resistance for on-site applications are described. Along with a short description of each technique especially those aspects are discussed, that are important for on-site applications: possibilities and limits of the technique as well its suitability for use in the different stages of rehabilitation works. The examples from practical on-site applications will be presented in a following report.

Reliability-based evaluation of bond strength for tensed lapped joints and anchorages in new and existing reinforced concrete structures

2017 ◽  
Vol 19 (3) ◽  
pp. 904-917 ◽  
Author(s):  
Giuseppe Mancini ◽  
Vincenzo I. Carbone ◽  
Gabriele Bertagnoli ◽  
Diego Gino
Keyword(s):  
Reinforced Concrete ◽  
Bond Strength ◽  
Concrete Structures ◽  
Reinforced Concrete Structures

scholarly journals Bond Deterioration of Corroded-Damaged Reinforced Concrete Structures Exposed to Severe Aggressive Marine Environment

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Cecielle N. Dacuan ◽  
Virgilio Y. Abellana
Keyword(s):  
Reinforced Concrete ◽  
Bond Strength ◽  
Crack Width ◽  
Concrete Structures ◽  
Steel Reinforcement ◽  
Minimal Amount ◽  
Reinforced Concrete Structures ◽  
Exponential Relationship ◽  
Cross Sectional ◽  
Different Diameters

Cracks lead to a reduction of the bond between concrete and reinforcing steel rebars. A considerable decrease in the bond strength is more dangerous to a structural element’s safety than the loss of the cross-sectional steel reinforcement area. The purpose of this study is to evaluate the bond strength of corroded-damaged structures exposed to severely aggressive marine environments. Eighteen (18) cube specimens with dimensions of 200   mm   x   200   mm were cast. They were reinforced with three (3) different diameters of deformed steel and were grouped as unconfined and confined. The specimen was accelerated under a simulated corrosive environment. The experiment results reveal that the bond strength of concrete and steel reinforcement is susceptible to corrosion levels. The degree of corrosion significantly affects the bond strength of concrete and steel. The bond strength and the average crack width have a strong correlation; a minimal amount of corrosion with a minimum crack width of 0.03 mm after cracking reduces the bond strength to an unacceptable level. Stirrups confinement has a significant influence on the bond strength; it provides an excellent means to counteract bond loss. The loss of bond directly affects the serviceability and ultimate strength of reinforced concrete structures. There is an exponential relationship between cement and steel reinforcement’s bond strength with the serviceability and residual strength of reinforced concrete structures.

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