Field aging and development of aging model for hot-poured crack sealants

Hasan Ozer, Seyed Saleh Yousefi, Imad L. Al-Qadi, Guillermo Elizalde-Castro

Research output: Contribution to journalArticlepeer-review


An investigation was conducted to evaluate the long-term field aging effects of hot-poured crack sealants by differential aging testing. An analysis of rheological and mechanical properties to implement two performance-based tests was used to characterize aging of sealants. A set of eight types of crack sealants was exposed to approximately 2 years of weathering conditions. Aging mechanisms were investigated by a comparison of the critical properties with those obtained at the time of installation inside a small kettle. Samples were collected every 6 months after installation for laboratory characterization. Laboratory characterization included low-temperature stiffness, cohesion, adhesion, and viscosity. According to the results of the experimental program, a consistent increase was observed in the low-temperature stiffness of crack sealants as a result of weathering. The study showed that the low- And hightemperature properties of the surface portion were significantly influenced by weathering effects even within a short period of time. A superposition rule analogous to time-temperature superposition for viscoelastic materials was applied to develop master curves. A phenomenological aging model was developed as a function of aging time and represented shift factors used in the master curve development. Sealants were categorized as Type A, B, or C on the basis of increasing aging potential.

Original languageEnglish (US)
Pages (from-to)90-99
Number of pages10
JournalTransportation Research Record
StatePublished - 2015

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Mechanical Engineering


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