Development and evaluation of vibrating Kelly Ball Test (VKelly test) for the workability of concrete.

Details

• Creators:
  Taylor, Peter ; Wang, Xuhao ; Wang, Xin
• Corporate Creators:
  Iowa State University. National Concrete Pavement Technology Center
• Corporate Contributors:
  Iowa. Dept. of Transportation ; United States. Federal Highway Administration
• Subject/TRT Terms:
  Concrete Evaluation Field Tests Laboratory Tests Mix Design Rheology Slip Form Paving Vibration Tests Workability
• Publication/ Report Number:
  TPF 5(205)
• Resource Type:
  Tech Report
• Geographical Coverage:
  Iowa
• Corporate Publisher:
  Iowa State University. Institute for Transportation
• Abstract:
  Due to the low workability of slipform concrete mixtures, the science of rheology is not strictly applicable for such concrete. However,
  
  the concept of rheological behavior may still be considered useful. A novel workability test method (Vibrating Kelly Ball or VKelly
  
  test) that would quantitatively assess the responsiveness of a dry concrete mixture to vibration, as is desired of a mixture suitable for
  
  slipform paving, was developed and evaluated. The objectives of this test method are for it to be cost-effective, portable, and repeatable
  
  while reporting the suitability of a mixture for use in slipform paving.
  
  The work to evaluate and refine the test was conducted in three phases:
  
  1. Assess whether the VKelly test can signal variations in laboratory mixtures with a range of materials and proportions
  
  2. Run the VKelly test in the field at a number of construction sites
  
  3. Validate the VKelly test results using the Box Test developed at Oklahoma State University for slipform paving concrete
  
  The data collected to date indicate that the VKelly test appears to be suitable for assessing a mixture’s response to vibration
  
  (workability) with a low multiple operator variability. A unique parameter, VKelly Index, is introduced and defined that seems to
  
  indicate that a mixture is suitable for slipform paving when it falls in the range of 0.8 to 1.2 in./√s.
  
  
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:6408bed73eb30baf56e3c25afa651a96fb1305cf64ac69b121ad2c0f52c46e4b51324e4ad50beeca9e9b7aa3c7f913266cd7c188ef453dcbceabe0f1f33fef96
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28695/dot_28695_DS1.pdf
• File Type:
  [PDF - 1.08 MB ]