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Chip Seal Best Practices (2005) / Chapter Skim
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Appendix D - Innovative Chip Seal Case Studies
Pages 109-110

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From page 109...
... Project Specific Data The Tai Tapu trial in 2000 had the following results: • First trial -- included three short trial lengths within a 700-m reseal; • Site -- a straight section of two-lane state highway; • Average annual daily traffic -- 2000; • Design adjusted for 5% heavy trucks; • Target application rate -- 1.90 L/m2 of binder; • Lowest application rate in wheelpath -- 1.47 L/m2; • Highest application rate on shoulder -- 2.46 L/m2; • Highest application rate between wheelpaths and centerline application rate -- 2.1 L/m2; • Chip used -- Grade 3 single-sized 16-mm to 13-mm chip, with an average least dimension of 8.61 mm; and • Average sand circle before sealing -- 177 mm. Performance of Practice The traditional design method calculates an average application rate for the whole road surface, which is not applicable to any particular area.
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From page 110...
... Considering the width of the surface cracks on roadway surfaces in Borrego Springs, San Diego County found chip sealing over fabric to be more cost-effective than chip sealing with ground rubber/paving asphalt binder, or chip sealing without fabric. Plans for This Best Practice San Diego County plans to routinely use this practice in the desert community where thermal surface cracks on the asphalt concrete pavement are present.
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Key Terms

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  • fulton hogan
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  • chip sealing
  • chip seals

  • diego county
  • variable transverse
  • found chip
  • excess sand
  • culated application

  • crack seal
  • paving asphalt
  • excess chips
  • remove excess
  • trial sections

  • transverse application
  • sand cover
  • using variable
  • sesses multispray
  • cracked bituminous

  • design methods
  • application design
  • rates calculated
  • rate appears
  • binder rates

  • design method
  • specific data
  • traditional treatment
  • american agencies
  • fog seal


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