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Comparison of spacing factors as measured by the air-void analyzer and ASTM C457 [Final Report]

File Language:
English


Details

  • Creators:
    Lindquist, Will ; Montney, Rodney
  • Corporate Creators:
    Kansas. Dept. of Transportation. Bureau of Research
  • Corporate Contributors:
    United States. Federal Highway Administration
  • Subject/TRT Terms:
  • Publication/ Report Number:
    FHWA-KS-15-10 ; SPR-73-1
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    Kansas
  • Corporate Publisher:
    Kansas. Dept. of Transportation. Bureau of Research
  • Abstract:
    The Kansas Department of Transportation (KDOT) began using the Air-Void Analyzer (AVA) in ; 2001 and first incorporated an AVA spacing factor requirement into paving specifications beginning in late ; 2002. In 2005, a statewide investigation to evaluate the AVA and specifications began with the collection of ; 4-inch diameter hardened concrete samples taken at or near locations where the spacing factor was ; determined with the AVA. The hardened concrete samples were tested to determine the spacing factor in ; accordance with ASTM C457 (2012), a well-established test method used to determine spacing factors in ; hardened concrete. A total of 270 data pairs were collected to evaluate KDOT’s current use of the AVA and ; ASTM C457 tests and to determine if a correlation (either direct or pass-fail criteria) exists between spacing ; factors obtained with the two methods. Results of the study indicate that average spacing factors obtained ; with the AVA were 1.67 higher than average spacing factors determined using ASTM C457. A strong direct ; correlation was not identified between the two test methods, although pass-fail criterion that limits KDOT’s ; risk of accepting concrete with an inadequate air-void system was identified.
  • Format:
    PDF
  • Download URL:
    https://rosap.ntl.bts.gov/view/dot/29736/dot_29736_DS1.pdf
  • File Type:
    Filetype[PDF - 1.33 MB]
  • Collection(s):
    US Transportation Collection
  • Main Document Checksum:
    urn:sha256:59587796e76feecee87c7e529a02125fd585b5db11ae76585cdb4511e3b832ce
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