Bazant2424 Bazant ZP. Physical model for steel corrosion in concrete sea structures–applications. Journal of Structural Division, 105(ST 6), 1155-1165, 1979.
|
Analytical model for time to corrosion cracking, based on the principle of a thick-walled (concrete) cylinder under uniform internal pressure caused by expansive corrosion products. |
Inability to recognize that concrete is a porous material and contains voids. |
Liu & Weyers55 Liu Y and Weyers RE. Modelling the time-to-corrosion cracking in chloride contaminated reinforced concrete structures. ACI Materials Journal. 1998; 95(6):675-681.
|
Models consider: (i) the importance of cover thickness in estimating the resistance of concrete to cracking due to reinforcement corrosion, and (ii) the influence of Icorr in estimation of the time to first crack |
Chlorides were added to concrete while mixing-hence initiation time of corrosion was not considered, sensitivity of a key parameter, viz. pore band around steel/concrete interface was not studied. |
El Maaddawy & Soudki2525 El Maaddawy T and Soudki K. Model for prediction of time from corrosion initiation to corrosion cracking. Cement and Concrete Composites. 2007; 29(3):168-175. http://dx.doi.org/10.1016/j.cemconcomp.2006.11.004. http://dx.doi.org/10.1016/j.cemconcomp.2...
|
Model developed based on Faraday's law; Considers the bar diameter, the current density, and the cover to bar diameter ratio as important factors. |
Considers Poisson's ratio and amount of voids in concrete as the only physical properties of concrete that affect its resistance to cracking. |
Alonso et al.66 Alonso C, Andrade MC, Rodriguez J and Diez JM. Factors controlling cracking of concrete affected by reinforcement corrosion. Materials and Structures. 1998; 31(7):435-441. http://dx.doi.org/10.1007/BF02480466. http://dx.doi.org/10.1007/BF02480466...
|
Expression for time to first crack; relation between /ϕ ratio and attack penetration; relationship between maximum crack width and attack penetration. |
Chlorides were added to concrete while mixing-hence initiation time of corrosion is not considered, cracks smaller than 0.05mm are not identified. |
Rasheeduzzafar et al.2626 Rasheeduzzafar, Al-Saadoun SS and Al-Gahtani AS. Corrosion cracking in relation to bar diameter, cover, and concrete quality. Journal of Materials in Civil Engineering. 1992; 4(4):327-342. http://dx.doi.org/10.1061/(ASCE)0899-1561(1992)4:4(327). http://dx.doi.org/10.1061/(ASCE)0899-156...
|
Model for corrosion cracking dependent on bar diameter, cover and concrete quality; Effect of corrosion on bond strength. |
A very high corrosion current density was used, results differed from other studies. |
Rodriguez et al.2727 Rodriguez J, Ortega LM, Casal J and Diez JM. Corrosion of reinforcement and service life of concrete structures. Durability of Building Material Components. 1996; 7(1):117-126.
|
Model for evaluation of crack width as a function of attack penetration. |
Chlorides were added to concrete while mixing-hence initiation time of corrosion is not considered, crack widths were measured only at the end of testing, so progression with time was not captured. |
Vidal et al.2828 Vidal T, Castel A and Francois R. Analyzing crack width to predict corrosion in reinforced concrete. Cement and Concrete Research. 2004; 34(1):165-174. http://dx.doi.org/10.1016/S0008-8846(03)00246-1. http://dx.doi.org/10.1016/S0008-8846(03)...
|
Model for crack width estimation, relating to steel cross-section loss, without accelerated corrosion tests. |
Limited sample data- inferences are based on two beams. |