Development of an Ultra-Accelerated Test to Evaluate ASR Potential in Concrete

Alkali Silica Reaction (ASR) is a global concrete durability problem with a complexity that continues to plague Wyoming. Although a simple, expeditious way to identify reactive aggregate, cement, and an appropriate mitigation measure does not exist; recent research shows promise of a week-long test to evaluate combinations of coarse and fine aggregates. This proposed test has the potential to replace the year-long concrete prism test. ASR is a significant problem in Cheyenne and other towns because of the presence of reactive aggregates. Although an effective mitigation technique exists in the form of adding effective fly ashes to concrete mix designs, not all fly ashes mitigate ASR in an equal manner. Wyoming Department of Transportation's (WYDOT’s) only means of evaluating fly ash as a mitigating agent is utilizing ASTM C1567 along with the history of the fly ash and the aggregates. The autoclave test would be extended to consider results of fly ashes combined with local aggregates. The overall goal is to provide a single test that can combine aggregates, cement, and mitigating measures within a one week time frame. Currently WYDOT ships fly ash from Texas to use as a mitigating. Finding locally available sources will improve sustainability and use a waste product. If suitable fly ash is not available, WYDOT specifies that contractors add lithium nitrate to concrete design mixtures. The cost of this mitigation can be significant. The primary goal of this project is cost savings by producing durable concrete with an extended service life.

Language

  • English

Project

  • Status: Active
  • Funding: $192850
  • Contract Numbers:

    RS03217

  • Sponsor Organizations:

    Wyoming Department of Transportation

    5300 Bishop Blvd.
    Cheyenne, WY  United States  82009-3340
  • Project Managers:

    Romo, Chris

    Rothwell, Bob

    Milburn, Greg

  • Performing Organizations:

    University of Wyoming, Laramie

    1000 E University Avenue, Department 3295
    Laramie, WY  United States  82071
  • Principal Investigators:

    Tanner, Jennifer

  • Start Date: 20170601
  • Expected Completion Date: 20210930
  • Actual Completion Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 01625527
  • Record Type: Research project
  • Source Agency: Wyoming Department of Transportation
  • Contract Numbers: RS03217
  • Files: RiP, STATEDOT
  • Created Date: Feb 2 2017 5:22PM