Quick test for durability factor estimation.

Details

• Alternative Title:
  Quick test for concrete durability factor estimation
• Creators:
  Richardson, David N.
• Corporate Creators:
  Missouri University of Science and Technology. Center for Transportation Infrastructure and Safety
• Corporate Contributors:
  Missouri. Dept. of Transportation. Organizational Results ; United States. Department of Transportation. Research and Special Programs Administration
• Subject/TRT Terms:
  • Concrete pavements
  • Aggregates
  • Testing
  • Freeze thaw tests
  • Freeze thaw durability
  • D cracking
  • Pavements, Concrete--Missouri--Testing
  • Aggregates (Building materials)--Missouri--Testing
• Publication/ Report Number:
  NUTC R219
• Resource Type:
  Tech Report
• Geographical Coverage:
  Missouri
• Edition:
  Final.
• Corporate Publisher:
  Missouri University of Science and Technology. Center for Transportation Infrastructure and Safety
• Abstract:
  The Missouri Department of Transportation (MoDOT) is considering the use of the AASHTO T 161 Durability Factor (DF) as an endresult ; performance specification criterion for evaluation of paving concrete. However, the test method duration can exceed 75 days ; before results are known. MoDOT contracted with the Missouri University of Science and Technology (Missouri S&T) to develop a ; method of approximation of DF based primarily on aggregate testing that would be of a shorter duration. Nineteen different ledge ; samples representing 18 ledges, 10 geologic formations (nine limestone and one dolomite) were sampled by MoDOT and delivered to ; Missouri S&T. The ledge samples represented DFs of 28 to 95 and nominal maximum aggregate sizes of ⅜ to 1 in. The aggregates ; were subjected to twelve different test methods. This information, coupled with MoDOT historical gradation, specific gravity, ; absorption, and deleterious materials data, formed the basis of the test study dataset. Multiple linear regression was used to produce ; seven models of varying accuracy and complexity for DF prediction. Historical T 161 DF data for the same aggregate materials ; (different samples) was used as the dependent variable. Model R2 values ranged from 0.804 to 0.974. Thus, seven op ; tions were open ; to MoDOT for consideration. As an alternate to the regression models, a threshold-limits method was presented.
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• Format:
  PDF
• Funding:
  DTRT06-G-0014
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/17154/dot_17154_DS1.pdf
• File Type:
  [PDF - 1.21 MB]
• Collection(s):
  University Transportation Centers ; US Transportation Collection
• Main Document Checksum:
  urn:sha256:731caf57f4850d37af6e25d342bb3b565df28c06cd52bb4ea9e639b69640ac43