| Title |
A Study on Prediction Model of Chloride Ion Permeation of Mortar by Incorporation of Steel Powder |
| Authors |
Ko Joo-Hwan ; Kim Jeong-Jin ; Park Soon-Jeon |
| Keywords |
Chloride ion ; Steel Powder ; Pore Solution ; Steel Corrosion ; Immersion Testing in 3%NaCl ; Diffusion Coefficient |
| Abstract |
In this study the prediction model of Chloride ion progress rate of concrete using steel powder as an addition is developed, in which the reduction of not only the diffusion rate of Cl- but also the amount of Fe2+ by replenishment of pore by corrosion products. The model is based on the diffusions of Cl- and its reaction with Fe2+ in chloride attack progression region. The model can also explain the characteristics of chloride ion permeation resistance of concrete that the matrix is densified due to chloride attack. The prediction by the model agreed well the experimental data in which the concrete using steel powder, and it showed the higher rate at chloride attack in early age and the lower rate in long-term age than the concrete without steel powder. Consequently the model can predict the rate of chloride attack of concrete exposed in the atmosphere regardless of the water-to-cement raito, the amount of the content of steel powder, etc. |