Skip to contentU.S. Department of Transportation/Federal Highway Administration
Pavement | Bridge
FHWA > Pavement : Bridge > ASR > Reference Documents on Preventing and Mitigating ASR

Reference Documents on Preventing and Mitigating ASR

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 for use by practitioners:

  1. Information on rapid test methods and evaluation processes 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.
    Report on Determining the Reactivity of Concrete Aggregates and Selecting Appropriate Measures for Preventing Deleterious Expansion in New Concrete Construction
  2. Information on rapid test methods and evaluation processes 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. Information will be included on 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.
    Report on the Diagnosis, Prognosis, and Mitigation of Alkali- Silica Reaction (ASR) in Transportation Structures
Updated: 06/12/2012