Characterization of Emulsion Wax Curing Agent as Bond-Breaker Medium in Jointed Concrete Pavement

Bond-breaker media have been used with success to reduce and minimize undesirable cracks reflecting from cement-treated or lean-concrete subbases (LCSs). The common bond-breaking media include: 1) emulsion slurry seal; 2) 30-60-mm-thin asphalt concrete; 3) 1 or 2 applications of wax-based curing compounds; 4) 1 or 2 layers of polyethylene sheets; and 5) geotextile. The cost differences among different bond-breaking media are significant for a highway project over 200 km long. Different types of tests (British pendulum friction, push off, pullout, and torsion) were performed to determine the cost-effectiveness of bond-breaking media. It was found that the bond stress had been reduced by approximately 90% when either emulsion wax curing compound (EWCC) or emulsion slurry seal was used. Results from the British pendulum, push-off, pullout, torsion, and cost analyses indicate that EWCC is the most cost-effective bond-breaker medium. Based on observations from the lab testing and field trial section, the EWCC application rate was selected at 0.4 L/m². As evident from the push-off and torsion test results, effectiveness of the EWCC as a bond-breaker medium decreased with time. Thus, a second application of EWCC is required if the LCS base has been exposed to the environment for more than 14 days. The 216-km project was successfully constructed with EWCC. It resulted in a more than $7 million savings by using EWCC instead of emulsion slurry seal. No distress or cracking has been observed after the section was opened to traffic for more than 1 year.

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  • Supplemental Notes:
    • Abstract reprinted with permission from ASCE
  • Authors:
    • Yao, Jialiang
    • Yuan, Jianbo
    • Zhang, Qisen
    • Wu, Xian
  • Publication Date: 2009-11


  • English

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  • Accession Number: 01147455
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Dec 29 2009 1:21PM