Analytical Model for Corrosion Penetration Depth at Cover Cracking in RC Structures

Hua Song; Di Tao Niu; Si Yuan Liu

doi:10.4028/www.scientific.net/KEM.400-402.227

Paper Titles

Mathematical Modeling of the Pessimum Action of Chlorides on the Extent of Delayed Ettringite Formation. Part 1: Formulation
p.203

Sulfate-Ion Diffusion Regularity and Reaction Mechanism of Sodium Sulfate Attack on Carbonized Concrete
p.211

Microstructure Analysis of the Rust Developing at Steel-Concrete Interface
p.215

Effect of Electrochemical Chloride Extraction on the Steel Reinforced Concrete
p.221

Analytical Model for Corrosion Penetration Depth at Cover Cracking in RC Structures
p.227

Fracture Behaviors of Dam and Wet-Sreening Concrete by Direct Tensile Test
p.233

Fatigue Fracture Propagation Random Process Model for Reinforcing Steel Bar in Reinforcing Concrete Structure
p.239

Damage Analysis of Waterproof Layer in Composite Tunnel Lining Based on Theory of Plate with Large Deflection
p.245

Stochastic Damage Constitutive Model for Concrete Considering Strain Rate Effect
p.251

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Analytical Model for Corrosion Penetration Depth at Cover Cracking in RC Structures

Abstract:

Corrosion products which occupy much greater volume accumulate, and generate expansive pressures on the surrounding concrete. The pressure builds up and eventually leads to the cover cracking of the structures. The cracking accelerates further corrosion and leads to the loss of the bond strength and the load carrying capacity. Corrosion cracking would reveal the reducing of the residual service life of the corrosion-affected structures. In this paper, an analytical model is proposed to predict the critical corrosion penetration at cover cracking in RC structures based on the crack process. An attempt has been made to develop the model by considering material properties of the surrounding concrete and expansive corrosion products. The problem is established as a boundary-value problem and the governing equations are expressed in terms of the radial displacement. The analytical predictions of the proposed model have also been in agreement with the available experimental data.