Effect of Ultrasonic Parameters on Electrochemical Chloride Removal and Rebar Repassivation of Reinforced Concrete
Abstract
:1. Introduction
2. Experimental Procedures
2.1. Materials and Specimen Preparation
2.2. Ultrasonic-Assisted Electrochemical Treatment
2.3. Measurements of Discharged and Residual Chloride Quantities
2.4. Electrochemical Test
3. Results and Discussion
3.1. Effect of Ultrasound Parameters on Chloride Ion Discharge
3.2. Effect of Ultrasonic Parameters on Residual Chloride Ion Content After ECR
3.3. Effect of Ultrasonic Parameters on Steel Bar Repassivation after ECR
4. Conclusions
- (1).
- Ultrasonic waves could effectively promote the ECR efficiency. When frequency is located in 17–49 Hz and power is in 40–60 W, the promotion effect has a weak positive correlation with the ultrasonic frequency and a relatively strong positive correlation with the ultrasonic power.
- (2).
- The promotion of ultrasonic waves on ECR efficiency was more reflected in the reduction of residual bound chloride ions, which might be a merit of ultrasonic-assisted ECR technique since it would reduce the potential risk from the prospective re-conversion of bound chloride to free ones after ECR treatment.
- (3).
- Electrochemical tests demonstrated that ultrasonic-assisted ECR treatment could accelerate the repassivation process of the embedding steel bar.
Author Contributions
Funding
Conflicts of Interest
References
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CaO | SiO2 | Al2O3 | Fe2O3 | SO3 | MgO | LOI | K2O | Na2O | TiO2 | MnO2 | P2O |
---|---|---|---|---|---|---|---|---|---|---|---|
64.65 | 21.70 | 5.08 | 4.32 | 1.08 | 0.92 | 0.85 | 0.54 | 0.22 | 0.14 | 0.10 | 0.05 |
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Liu, Q.; Song, Z.; Cai, H.; Zhou, A.; Wang, W.; Jiang, L.; Liu, Y.; Zhang, Y.; Xu, N. Effect of Ultrasonic Parameters on Electrochemical Chloride Removal and Rebar Repassivation of Reinforced Concrete. Materials 2019, 12, 2774. https://doi.org/10.3390/ma12172774
Liu Q, Song Z, Cai H, Zhou A, Wang W, Jiang L, Liu Y, Zhang Y, Xu N. Effect of Ultrasonic Parameters on Electrochemical Chloride Removal and Rebar Repassivation of Reinforced Concrete. Materials. 2019; 12(17):2774. https://doi.org/10.3390/ma12172774
Chicago/Turabian StyleLiu, Qingyang, Zijian Song, Huanchun Cai, Aiping Zhou, Wanyi Wang, Linhua Jiang, Yongqi Liu, Yingjie Zhang, and Na Xu. 2019. "Effect of Ultrasonic Parameters on Electrochemical Chloride Removal and Rebar Repassivation of Reinforced Concrete" Materials 12, no. 17: 2774. https://doi.org/10.3390/ma12172774