Evaluation of repeatability of Kansas test method KT-73, "density, absorption and voids in hardened concrete," boil test : [technical summary].

Details

• Creators:
  Montney, Rodney A. ; Barker, Susan F.
• Corporate Creators:
  Kansas. Dept. of Transportation
• Subject/TRT Terms:
  • Concrete
  • Permeability
  • Quality control
  • Durability tests
  • Test procedures
  • Evaluation
• Publication/ Report Number:
  KS-15-04
• Resource Type:
  Brief
• Geographical Coverage:
  Kansas
• Corporate Publisher:
  Kansas. Dept. of Transportation
• Abstract:
  For years, the Kansas Department of Transportation (KDOT) and concrete producers in ; the state have used a Rapid Chloride Test for concrete cylinders, AASHTO T277. This ; test has been thought of as an appropriate quality control test to evaluate permeability ; in concrete. Unfortunately, it has a low repeatability—a 51% difference in the mean ; between two laboratories/operators as percent of the mean (AASHTO T277, 2011). This ; could mean the difference between reliable permeability results and questionable results. ; This has a direct impact on KDOT’s ability to judge the quality of the concrete mixture, ; and whether it will be a long-term durable concrete or a concrete that fails early. ; KDOT has also used the Kansas Test Method KT-73 (2012), Density, Absorption and ; Voids in Hardened Concrete, a permeability test commonly referred to as the Boil Test, ; to evaluate concrete durability in the state of Kansas. It covers the determinations of ; density, percent absorption, and percent permeable voids in hardened concrete. KT-73 ; reflects testing procedures found in ASTM C642 (2013). KDOT has relied on this test to ; evaluate concrete permeability, but some concrete producers in the state have objected ; to its accuracy, preferring the Rapid Chloride Test which has a low repeatability.
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• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/29078/dot_29078_DS1.pdf
• File Type:
  [PDF - 152.29 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:1fe425050050868b15ecd740f52317132b081cc5d2c8460745e937e65585d24c