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Alkali-Silica Reactivity (ASR) Development and Deployment Program

Development of ASR Protocols

The decision making process for preventing and mitigating ASR in new and existing concrete needs to be improved. Additional guidance is needed to help engineers and concrete practitioners determine appropriate prevention and mitigation options. Information on how to determine the future expansion of a structure that is afflicted with ASR is also needed. Existing information, guide specifications, inspection and evaluation protocols are being used to develop the following guide documents or protocols for use by practitioners:

  1. Rapid test methods and evaluation protocol(s) to select job specific ASR preventative procedures for new pavements, bridges, and other highway structures using specific materials available to the project. Materials include, but are not limited to, aggregates, cements, pozzolans, and chemical admixtures.
  2. Rapid test methods and evaluation protocol(s) to select mitigation procedures for existing pavements, bridges, and other highway structures using a variety of materials. Materials should include, but are not limited to, lithium and silane. A variety of other methods and techniques for mitigating ASR should also be included.
  3. Rapid test methods and evaluation protocol(s) for agencies to determine the future deterioration of a pavement, bridge, or other highway structure afflicted with ASR. The rapid test and evaluation should be capable of producing reliable predictions is less than six months.

It is anticipated that the protocols will be completed in early 2008.
 
This page last modified on 02/22/08
  
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