Concrete Deterioration of Prestressed Bridge Beams
Many prestressed concrete beam bridges in Michigan constructed in the 1970’s and 1980’s are showing mild to significant concrete deterioration due to Akali Aggregate Reactivity (AAR), including, but not limited to, Akali-Silica Reactivity (ASR), Akali-Carbonate Reactivity (ACR), and other material compatibility issues. Cracking and spalling deterioration tends to be more evident on fascia beams, and in some cases has required full superstructure replacements much earlier than anticipated, with ASR confirmed as a contributing factor. It is currently unknown how widespread this problem is in Michigan’s bridges, and if it extends to bridges built with prestressed beams constructed in the 1990’s and beyond. MDOT instituted specifications to test and mitigate for ASR in approximately 2012, but that leaves a significant portion of the bridge inventory whose susceptibility to AAR and durability may be unknown. Michigan Department of Transportation (MDOT) has recently tried several rehabilitation techniques but short and long-term durability of these approaches is relatively unknown.
Language
- English
Project
- Status: Completed
-
Contract Numbers:
2016‐0069 Z9
-
Sponsor Organizations:
Michigan Department of Transportation
8885 Ricks Road, P.O. Box 30049
Lansing, MI United States 48909 -
Performing Organizations:
1903 W. Michigan Avenue
Kalamazoo, MI United States 49008-5241 - Start Date: 20190301
- Expected Completion Date: 20220731
- Actual Completion Date: 20220731
Subject/Index Terms
- TRT Terms: Alkali aggregate reactions; Beams; Cracking; Deterioration; Durability; Prestressed concrete bridges; Rehabilitation (Maintenance); Spalling
- Identifier Terms: Michigan Department of Transportation
- Geographic Terms: Michigan
- Subject Areas: Bridges and other structures; Highways; Maintenance and Preservation; Materials;
Filing Info
- Accession Number: 01762867
- Record Type: Research project
- Source Agency: Michigan Department of Transportation
- Contract Numbers: 2016‐0069 Z9
- Files: RIP, STATEDOT
- Created Date: Jan 28 2021 8:22AM