| Title |
Protective Effect on the Chloride ion Permeation of Cement Mortar by Steel Powder |
| Authors |
Kim Jeong-Jin ; Park Dong-Cheon |
| Keywords |
Chloride Ion ; Steel Powder ; Corrosion of Reinforcement ; Immersion Testing in 3%NaCl ; Corrosion Reactive Time |
| Abstract |
The purpose of this study is protective effect on the chloride ion permeation of cement mortar by the ratio of steel powder mixing. First, after immersion testing in 3％NaCl for 364 days, the corrosion area and the weight loss of steel bar, and pore volume in admixture mortar was decreased greatly by increase the displacement ratio of steel powder and changing the property as compared with non-admixture mortar. The depth of chloride ion permeation correlates the pore volume and pore size distribution and corrosion reactive time depend on exposure duration in 3％NaCl. The depth of chloride ion permeation of mortar decreases due to the replenishment of pore by corrosion products. Based on these test results, the pore volume of mortar that mixed with steel powder was decreased 4%?8%, compared with plain mortar. and results of EPMA, it is necessary to consider the pore volume and corrosion reactive time at the same time. |