| Title | Time-to-Corrosion of Reinforcing Steel in Concrete Slabs, Vol. 4: Galvanized Reinforcing Steel |
|---|---|
| Record ID | 64230 |
| Personal Name Creator |
Clear, Kenneth C. |
| Personal Name Contributor |
Virmani, Yash Paul; Jones, Walter; Jones, David |
| Corporate Creator | United States. Federal Highway Administration. Materials Division |
| Corporate Contributor |
United States. Department of Transportation. Federal Highway Administration. Office of Research and Development |
| Publisher | United States. Federal Highway Administration |
| Publication Date | 19811201 |
| Language | English |
| Abstract | Four-ft. by 5-ft. by 6-inch (1.2m x 1.5m x 0.15m) reinforced concrete slabs were fabricated, cured and subjected to 7 years of daily salting at an outdoor exposure yard. Subsequently, the slabs were modified and instrumented to allow direct measurement of the corrosion current flowing between the top and bottom mats of reinforcing steel and other characteristics of the corrosion process. Comparison of the performance of galvanized reinforcing steel and conventional black steel in the slabs indicated the following: 1. Galvanized reinforcing steel is subject to the same type of macroscopic (galvanic) corrosion in salt-contaminated concrete, as black steel. 2. There was no benefit from the use of all galvanized reinforcing steel in a 0.40 water-cement ratio concrete. 3. Galvanizing all the reinforcing steel in a 0.50 water-cement ratio concrete resulted in slightly lower corrosion rates, whereas galvanizing only the top mat reinforcing steel was very detrimental, resulting in corrosion rates twice as high as those for all black steel. 4. The lowest corrosion rates measured in this comparative/study of black and galvanized steel were those for the slab containing all black steel and a 0.40 water-cement ratio concrete. |
| Rosap ID | dot:34959 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/34959 |
| TRT Terms | Contaminants; Corrosion; Galvanized metals; Reinforced concrete; Reinforcing steel; Slabs; Sodium chloride; Water cement ratio; Concrete; Galvanizing |
| General Subjects | Bridge deck; Contamination; Corrosion rate; Galvanic cell; Macrocell |
| Geographical Coverage |
United States |
| TRIS Online Accession No |
377247 |
| Report Number | FHWA/RD-82/028 |
| Resource type | Tech Report |
| URL | https://ntlrepository.blob.core.windows.net/lib/64000/64200/64230/FHWA-RD-82-28.pdf |
| Format | |
| Database | NTL Digital Repository |