U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
202-366-4000


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Research and Development (R&D) Project Sites

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Project Information
Project ID:   FHWA-PROJ-08-0040
Project Name:   Understanding the Alkali-Silica Reaction (ASR) Mechanism and Developing Rapid and Reliable Laboratory Test Methods to Address ASR Reactivity of Concrete Mixture Design
Project Status:   Active
Start Date:  September 30, 2008
End Date:  December 31, 2013
Contact Information
Last Name:  Virmani
First Name:  Paul
Telephone:  202-493-3052
E-mail:  paul.virmani@dot.gov
Office:   Office of Infrastructure Research and Development
Team:   Infrastructure Management Team [HRDI-60]
Program:   Alkali-Silica Reactivity
Project detail
Roadmap/Focus area(s):   Infrastructure Research and Technology Strategic Plan and Roadmap
Project Description:   The goal of this project is to eliminate/reduce the deteriorating effects of alkali-silica reactions (ASRs) in highway concrete structures, even when exposed to adverse natural environments by understanding alkali-silica reactions (ASRs) mechanisms and developing methodology to design concrete mix design resistant to alkali-silica reactions (ASRs) phenomenon. Another goal of this project is to develop an accelerated laboratory test method to replace the ASTM C 1260 test method, which takes one to two years to complete.
Goals:  
The key project objectives are to:
(1) Advance the fundamental understanding of an alkali-silica reaction (ASR).
(2) Develop a rapid and reliable test method to evaluate concrete mixture design to assess alkali-silica reaction (ASR) reactivity.
Product Type:   Research report
Test Methodology:   The test approach is to use lightweight aggregate (LWA) to reduce the lithium content in concrete mixture to control alkali-silica reactions (ASRs). Another approach is to identify the mineralogy and composition of aggregates and fly ashes to design durable concrete mix design without lengthy laboratory evaluation.
Expected Benefits:   The expected benefit is long-lasting structures with no alkali-silica reactions (ASR) for the design life.
Deliverables:   Methodology for concrete mix design with minimal laboratory evaluation.
FHWA Topics:   Roads and Bridges--Structures
TRT Terms:   Materials
Maintenance
Concrete
Infrastructure
Bridges
Research
FHWA Disciplines:   Structures
Pavement and Materials
Subject Areas:   Bridges and other structures
Maintenance and Preservation
Pavements

 

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