LONG - TERM PERFORMANCE OF CONCRETE CONTAINING HYDRATED HYDRAULIC LIME AS AN ADMIXTURE

In 1941 two bridges were constructed with decks using concrete incorporating as an experimental fature the use of hydrated lime as an admixture in amounts varying from zero to 12%. After 35 years of service the decks were scheduled for repairs to correct surface spalling caused by corrosion of the reinforcing steel. Performance surveys were made including the measurement of electrical corrosion potential. Cores were removed for petrographic examination, chloride content and analysis by X-ray diffraction. Among the conclusions were: 1. The major defect observed in surface spalling. 2. Based upon electrical potential measurements, the corrosion potential decreases with increasing additions of lime between 4 and 8% and increases slightly between 8 and 12%. 3. The better than average performance of the decks as compared with contemporary decks undoubtedly reflects the greater than average testing and inspection exercised in connection with the experimental features of the project.

Record URL:
Supplemental Notes:
- Sponsored by DOT, Federal Highway Administration.
Corporate Authors:
Virginia Highway and Transportation Research Council

Charlottesville, VA United States
Authors:
- Newlon Jr, H H
Publication Date: 1976-12

Media Info

Pagination: 63 p.

Subject/Index Terms

TRT Terms: Admixtures; Bridge decks; Calcium hydroxide; Chloride content; Concrete; Core samples; Corrosion; Diffraction; Geological surveying; Performance; Petrography; Reinforcing steel; Spalling; X rays
Uncontrolled Terms: X-ray diffraction
Old TRIS Terms: Cores; Petrographic investigations
Subject Areas: Geotechnology; Highways; Materials; Pavements;

Filing Info

Accession Number: 00158097
Record Type: Publication
Source Agency: Federal Highway Administration
Report/Paper Numbers: FHWA-VA-RD-77-R32 Final Rpt.
Contract Numbers: 1260
Files: TRIS, USDOT, STATEDOT
Created Date: Oct 13 1977 12:00AM