Asphalt concrete overlays on CRCP : decision criteria, tack coat evaluation, and asphalt concrete mixture evaluation.

Details

• Creators:
  Trevino, Manuel ; Kim, Seong-Min ; Smit, Andre ; McCullough, B. Frank ; Yildirim, Yetkin
• Corporate Creators:
  University of Texas at Austin. Center for Transportation Research
• Corporate Contributors:
  Texas. Dept. of Transportation. Research and Technology Implementation Office ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Overlays (Pavements)
  • Bituminous overlays
  • Asphalt concrete pavements
  • Tack coats
  • Asphalt
  • concrete
  • decision tree
  • reinforced concrete
  • pavements
  • thin asphalt concrete overlays
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• Publication/ Report Number:
  FHWA/TX-05/0-4398-3
• Resource Type:
  Tech Report
• Geographical Coverage:
  Texas
• Corporate Publisher:
  Texas Department of Transportation. Research and Technology Implementation Office
• Abstract:
  This report presents the research undertaken within two areas of study of thin asphalt concrete (AC) overlays to rehabilitate ; continuously reinforced concrete pavements (CRCP). The first one is the development of a decision tree for the project ; selection of a rehabilitation of this kind. The second area is the testing of tack coats and AC mixtures for its use in AC ; overlays. ; Within the first area, several decision criteria, based on the functional and structural characteristics of the existing pavement, ; were developed to evaluate the technical suitability of AC overlays on CRCP. These criteria are, namely, a profile criterion, ; based on the remaining life concept and on the formulation of a dynamic load factor; a condition survey criterion, which ; utilizes a pavement distress index and the rate of failures per mile per year; and a deflection criterion, which evaluates the ; hypothetical contribution of an AC overlay based upon deflection measurements performed on the existing structure. ; The second part of the study investigated the interface shear strength of tack coats used for bonding AC and portland cement ; concrete pavement (PCCP), and the rutting resistance of asphalt mixtures for use as overlays on CRCP. A shear test was ; developed for the tack coats experiment, and it was found that mixes with finer gradations appear to improve the shear ; strengths of tack coat interfaces. Based on the results of the rutting resistance tests, it is recommended to use Superpave, ; CMHB, and Type C mixes for AC overlays on CRCP, and to avoid using siliceous river gravel aggregates in these mixes, ; because of its inferior performance.
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• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/31684/dot_31684_DS1.pdf
• File Type:
  [PDF - 1.83 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:f462b7c33ca685ece1d0103cc5256068922c7c3f7122b42600b3670655f2d6d1