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PMSS Project Details


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
Status: Active
Last Name:Virmani
First Name:Paul
Office: Office of Infrastructure Research and Development
Team:Infrastructure Management Team
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.
Start Date: September 30, 2008
End Date: December 31, 2013
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.
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:Name: Report
Product Type(s): Research report
Description: Methodology for concrete mix design with minimal laboratory evaluation.
Keywords: Materials
Subject Areas: Bridges and other structures
Maintenance and Preservation