1. Evaluation of maintenance procedures for bridge spalling on parapet walls : final report.
- Author
-
Ohio. Department of Transportation. Office of Statewide Planning and Research, United States. Federal Highway Administration, Miller, Richard, Delatte, Norbert J., Mullins, Sarah, University of Cincinnati. Department of Civil and Architectural Engineering and Construction Management, Ohio. Department of Transportation. Office of Statewide Planning and Research, United States. Federal Highway Administration, Miller, Richard, Delatte, Norbert J., Mullins, Sarah, and University of Cincinnati. Department of Civil and Architectural Engineering and Construction Management
- Abstract
State Job Number 135313, Deterioration of parapet walls is a concern to the Ohio Department of Transportation. Spalling of the parapets, presents a danger as pieces of deteriorated concrete may fall onto the road below. The current repair method, is to chip off the deteriorated concrete, however, this process may damage the sound concrete and leaves an, unprotected surface. This project used a literature search to explore methods of concrete removal and, protecting/sealing the remaining surface. It was determined that hydrodemolition was the most promising, method of concrete removal as it does not damage the remaining concrete. This is most efficiently done with a, robot and a robot was found that may work on vertical surfaces of the parapets. Literature and research on, protectants/sealants shows a number of possible solutions, but there is no long term data on performance. One, protectant, polyurea, appears promising. This material may not only seal the concrete but may provide a, reinforcing barrier that might retain loose pieces of concrete.