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Evaluation of cold in-place recycling for rehabilitation of transverse cracking on US 412.
  • Published Date:
    2007-12-01
  • Language:
    English
Filetype[PDF-3.42 MB]


Details:
  • Publication/ Report Number:
    FHWA/OK 07 (04)
  • Resource Type:
  • Geographical Coverage:
  • OCLC Number:
    749984828
  • Edition:
    Final report.
  • Corporate Publisher:
  • NTL Classification:
    NTL-HIGHWAY/ROAD TRANSPORTATION-Construction and MaintenanceNTL-HIGHWAY/ROAD TRANSPORTATION-Materials ; NTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and Performance ;
  • Format:
  • Abstract:
    Successful rehabilitation of transverse cracked hot mix asphalt (HMA) pavements has been a challenge

    for state DOTs. Conventional thin HMA overlays allow the rapid return of the existing transverse cracks

    and thicker HMA overlays are cost prohibitive. Cold In-Place Recycling (CIR) has been shown to be a

    cost-effective procedure for rehabilitation of transverse cracked HMA pavements. The use of fly ash

    Portland cement slurry to pretreat large transverse cracks has made CIR applicable to HMA pavements

    with severe (wide) transverse cracks. The new Mechanistic-Empirical Pavement Design Guide (MEPDG)

    uses dynamic modulus as a material characterization parameter for asphalt mixtures. In order to

    ensure CIR’s place in pavement maintenance and rehabilitation activities, guidelines on dynamic modulus

    (E*) parameters need to be developed.

    The objectives of this study were to evaluate the effectiveness of CIR with slurry crack injection to

    rehabilitate transverse cracked HMA pavements on two rehabilitation projects on US 412 in Beaver and

    Harper counties, to investigate the dynamic modulus properties of CIR mixtures, and to evaluate the

    appropriateness of the M-EPDG predictive equation for dynamic modulus for CIR mixtures.

    The CIR treatments have reduced the occurrence of transverse cracking but longitudinal wheel path

    cracking is occurring in the CIR test sections. The longitudinal cracking might be attributed to the thin,

    stiff HMA layer placed over the softer CIR layer. AASHTO TP 62 can be used to determine dynamic

    modulus of CIR mixtures with slight modification. The predictive dynamic modulus equations give good

    agreement with measured values at the three higher test temperatures if the aggregate properties are based

    on the RAP gradation and binder properties on the base binder in the asphalt emulsion.

  • Funding:
  • Supporting Files:
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