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Aggregate freeze-thaw testing and d-cracking field performance : 30 years later.

File Language:
English


Details

  • Creators:
    McLeod, Heather A.K. ; Welge, Joshua ; Henthorne, Robert
  • Corporate Creators:
    Kansas. Dept. of Transportation. Bureau of Materials & Research
  • Subject/TRT Terms:
  • Publication/ Report Number:
    KS-14-04
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    Kansas
  • Corporate Publisher:
    Kansas. Dept. of Transportation. Bureau of Materials & Research
  • Abstract:
    Premature deterioration of concrete pavement due to D-cracking has been a problem in Kansas since the 1930s. Kansas ; geology includes mineable limestone coarse aggregates with variable durability in the eastern portion of the state. Due ; to this variability and historically poor D-cracking field performance, the Kansas DOT initiated intensive identification ; and tracking of individual mined beds, as well as frequent durability testing during production in the 1980s. D-cracking field performance of concrete pavements containing limestone coarse aggregates was investigated in 2010- ; 2012. Results of this investigation indicate that the rate of D-cracking decreased, but the minimum rate of D-cracking ; presence in concrete pavements is more than 30%. ; In reaction to these results, KDOT implemented changes aimed at mitigating the risk of D-cracking. Implementation ; actions included increasing the number of freeze-thaw cycles for aggregate in concrete prisms from 300 to 660 cycles, ; freeze-thaw testing of all aggregate types (not just limestone) in concrete, focusing aggregate sampling at the point of ; concrete production, and including an “acceptable field-performance history” criterion for concrete aggregates. ; Ongoing research is being conducted to develop new methods to identify durable aggregates and faster testing ; techniques.
  • Format:
    PDF
  • Download URL:
    https://rosap.ntl.bts.gov/view/dot/28013/dot_28013_DS1.pdf
  • File Type:
    Filetype[PDF - 577.25 KB]
  • Collection(s):
    US Transportation Collection
  • Main Document Checksum:
    urn:sha256:9f4c4e9e7991769fe631548b0af356e22c006659e4a93b50f871b46f44d7e197
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