|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|
Office of Infrastructure Research and Development |
|Team:||Infrastructure Management Team|
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.|
Product Type(s): Research report
Description: Methodology for concrete mix design with minimal laboratory evaluation.
Bridges and other structures|
Maintenance and Preservation