Verification of effectiveness of chip seal as a pavement preventive maintenance treatment using LTPP data

Michael Mamlouk, Matild Dosa

Research output: Contribution to journalArticlepeer-review

34 Scopus citations


It is hypothesised that maintenance treatments should be applied in the preventive mode before pavements display significant amounts of distress in order to be more cost-effective. The objective of this study was to verify the concept of preventive maintenance by examining the long-term effectiveness of chip seal treatment in four climatic zones in the USA using the long-term pavement performance database. Pavement sections were categorised into smooth, medium and rough pavements, based upon initial condition (IC) as indicated by the international roughness index. Pavement performance of treated and untreated sections was collectively modelled using exponential regression analysis. Effectiveness was evaluated in terms of life extension, relative benefit and benefit-cost ratio. The results showed that preventive maintenance is cost-effective. The life extension, relative benefit and benefit cost ratio were highest for sections whose IC was smooth at the time of treatment. Chip seal treatment effectiveness showed no correlation to climatic conditions or to traffic levels.

Original languageEnglish (US)
Pages (from-to)879-888
Number of pages10
JournalInternational Journal of Pavement Engineering
Issue number10
StatePublished - Dec 2014


  • benefit-cost ratio
  • chip seal
  • maintenance effectiveness
  • pavement preservation
  • preventive maintenance
  • relative benefit

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Mechanics of Materials


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