Assessing cryogenic testing of aggregates for concrete pavements

Details

• Creators:
  Korhonen, Charles ; Charest, Brian
• Subject/TRT Terms:
  • Aggregates
  • Concrete
  • Freeze thaw tests
  • Test procedures
• Publication/ Report Number:
  Special report 95-4
• DOI:
  https://doi.org/10.21949/1404577
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  US Army Corps of Engineers. Cold Regions Research and Engineering Laboratory (U.S.)
• Abstract:
  Damage to concrete pavements caused by freeze-thaw deterioration of concrete aggregate remains a serious problem. Current tests for determining an aggregate's freeze-thaw durability can take up to 70 days to perform and results from these tests don't always correlate well with field performance. A rapid test for freeze-thaw durability that would accurately predict field service would be a valuable tool for providing durable concrete. Cycling aggregate 10 times between liquid nitrogen and hot water proved useful as a tool to rule out frost-susceptible aggregate. Pore size distribution measurements reveal pore sizes that are critical to freeze-thaw durability. Aggregates with more than 75% of their measurable pore volume between pore diameters of 0.01 and 5 mm or with more than 95% of their measurable pore volume smaller than 5 mm were susceptible to frost damage. Thus a new freeze-thaw test for aggregates might employ the cryogenic test to screen out all frost-susceptible aggregate and pore ; size measurement classify the rest. This new test procedure offers results much sooner than current standard test procedures. Further study is needed to refine this method for general use.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/13249/dot_13249_DS1.pdf
• File Type:
  [PDF - 96.36 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:b0e08f4e6d3b40e1352bfa70fd342252f5794f624f755b028dc8fc8e7f5580c3069ffe92581fc3685441a1d9b10777ef591383fe592b2a6e96f0e20da3c65d87