主催: Eastern Asia Society for Transportation Studies
p. 299
Durability of bituminous pavements is usually attributed to the aging of the bitumen binder used to hold the aggregates within the pavement mix. The process of aging which normally occurs at the bitumen surface will propagate inwards till the bitumen layer hardens and brittle failure occurs. One mitigating measure is to increase the binder film thickness while minimizing binder drain-down. In this study, oil palm fiber (OPF) is used to increase binder viscosity, thus increasing binder film thickness. Certain basic rheological tests were conducted on samples prepared with various fiber contents. Initial results appear to indicate that the addition of oil palm fiber does increase the binder viscosity, thus potentially increasing the binder film thickness. The softening point test also indicates that the addition of OPF also reduces the temperature susceptibility of the binder.
