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 Durability Tests Evaluation Permeability Quality Control Test Procedures
• 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.
  
  
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:1fe425050050868b15ecd740f52317132b081cc5d2c8460745e937e65585d24c
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/29078/dot_29078_DS1.pdf
• File Type:
  [PDF - 152.29 KB ]