Title:
Concrete Q&A: Repair of Corrosion-Related Damage
Author(s):
Publication:
Concrete International
Volume:
47
Issue:
4
Appears on pages(s):
76-80
Keywords:
reinforcement, delamination, condition, rust
DOI:
10.14359/51746702
Date:
4/1/2025
Abstract:
While completing concrete repairs, is it necessary to remove sound concrete if a nearby reinforcing bar exhibits rust? Can terms like corrosion or rust be used interchangeably? This month’s Q&A provides answers to these questions as well as a discussion on various factors influencing the extent of a repair of corrosion-related damage in concrete structures.
Related References:
1. ACI Committee 562, “Assessment, Repair, and Rehabilitation of Existing Concrete Structures—Code and Commentary (ACI CODE-562-21),” American Concrete Institute, Farmington Hills, MI, 2021, 83 pp.
2. ICRI No. 310.1R-08, “Guide for Surface Preparation for the Repair of Deteriorated Concrete Resulting from Reinforcing Steel Corrosion,” International Concrete Repair Institute, Minneapolis, MN, 2008, 16 pp.
3. ACI Committee 563, “Specifications for Repair of Concrete in Buildings (ACI SPEC-563-18),” American Concrete Institute, Farmington Hills, MI, 2018, 40 pp.
4. ACI Committee 364, “Concrete Removal in Repairs Involving Corroded Reinforcing Steel—TechNote (ACI PRC-364.6-22),” American Concrete Institute, Farmington Hills, MI, 2022, 3 pp.
5. ACI Committee 563, “Specifications for Repair of Concrete in Buildings (ACI SPEC-563-18),” American Concrete Institute, Farmington Hills, MI, 2018, 40 pp.
6. ACI Committee 222, “Guide to Protection of Metals in Concrete Against Corrosion (ACI PRC-222-19),” American Concrete Institute, Farmington Hills, MI, 2019, 60 pp.
7. Syll, A.S., and Kanakubo, T., “Impact of Corrosion on the Bond Strength between Concrete and Rebar: A Systematic Review,” Materials, V. 15, No. 19, Oct. 2022, 21 pp.
8. Apostolopoulos, C., and Koulouris, K, “Corrosion Effects on Durability of RC Structures,” Metals, V. 11, No. 11, Nov. 2021, 2 pp.
9. Xu, A., and Shayan, A., “Relationship between Reinforcing Bar Corrosion and Concrete Cracking,” ACI Materials Journal, V. 113, No. 1, Jan.-Feb. 2016, pp. 3-12.
10. ACI Committee 364, “Guide for Assessment of Concrete Structures Before Rehabilitation (ACI PRC-364.1-19),” American Concrete Institute, Farmington Hills, MI, 2019, 20 pp.
11. NACE SP0308-2018, “Inspection Methods for Corrosion Evaluation of Conventionally Reinforced Concrete Structures,” Association for Materials Protection and Performance, 2018.
12. ACI Committee 364, “Rehabilitation of Structure with Reinforcement Section Loss—TechNote (ACI PRC-364.10-14),” American Concrete Institute, Farmington Hills, MI, 2014, 4 pp.
13. ACI Committee 546, “Concrete Repair—Guide (ACI PRC-546-23),” American Concrete Institute, Farmington Hills, MI, 2023, 59 pp.
14. ACI Committee E706, “Field Guide to Concrete Repair Application Procedures: Installation of Embedded Galvanic Anodes (ACI RAP Bulletin 8-22),” American Concrete Institute, Farmington Hills, MI, 2023, 8 pp.
15. NACE SP0290-2019, “Impressed Current Cathodic Protection of Reinforcing Steel in Atmospherically Exposed Concrete Structures,” Association for Materials Protection and Performance, 2019.
16. NACE SP0216-2023, “Galvanic Cathodic Protection of Reinforcing Steel in Atmospherically Exposed Concrete Structures,” Association for Materials Protection and Performance, 2023.
17. NACE SP0390-2019, “Maintenance and Rehabilitation Considerations for Corrosion Control of Atmospherically Exposed Existing Steel-Reinforced Concrete Structures,” Association for Materials Protection and Performance, 2019.