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

Details

• Creators:
  McLeod, Heather A.K. ; Welge, Joshua ; Henthorne, Robert
• Corporate Creators:
  Kansas. Dept. of Transportation. Bureau of Materials & Research
• Subject/TRT Terms:
  Coarse Aggregates Concrete Pavements D Cracking Durability Tests Field Studies Freeze Thaw Durability Limestone Aggregates
• 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
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:9f4c4e9e7991769fe631548b0af356e22c006659e4a93b50f871b46f44d7e197
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28013/dot_28013_DS1.pdf
• File Type:
  [PDF - 577.25 KB ]