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Prediction of the penetrated rust into the microcracks of concrete caused by reinforcement corrosion

Kiani, K ; Sharif University of Technology | 2011

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  1. Type of Document: Article
  2. DOI: 10.1016/j.apm.2010.11.039
  3. Publisher: 2011
  4. Abstract:
  5. Consider a steel-rust-concrete composite consisting of a circular cylindrical concrete cover and a coaxial uniformly corroding steel reinforcement. Prediction of the amount of rust penetrated into the microcracks of concrete cover from a set of data measured at the surface of the concrete is of particular interest. The steel is assumed to be linear isotropic and rust follows a power law stress-strain relation. For the concrete, anisotropic behavior and post-cracking softening model is employed. The formulations lead to a nonlinear boundary value problem which is solved analytically. A key parameter β, defined as the ratio of the volume of corrosion products inside the cracks to the volume of the cracks, is calculated. With some efforts, this parameter is also extracted from the available theoretical and experimental studies for the purpose of comparison. The effects of the mechanical properties of rust and concrete on β is addressed
  6. Keywords:
  7. Steel-rust-concrete composite media ; Anisotropic behaviors ; Concrete composites ; Concrete cover ; Corrosion products ; Cylindrical concrete ; Experimental studies ; Key parameters ; Mathematical modeling ; Nonlinear boundary value problems ; Penetration of rust into the microcracks of concrete ; Power law stress ; Reinforcement corrosion ; Steel reinforcements ; Boundary value problems ; Computer simulation ; Concrete beams and girders ; Cracks ; Electrochemical corrosion ; Fatigue of materials ; Mechanical properties ; Structural members ; Concrete reinforcements
  8. Source: Applied Mathematical Modelling ; Volume 35, Issue 5 , 2011 , Pages 2529-2543 ; 0307904X (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0307904X1000449X