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doi:10.3850/978-981-08-7920-4_S3-M028-cd
Effect of Oil Shale Ash on Dynamic Creep of Asphalt Concrete Mixtures
Taisir S. Khedaywi1 and Arabi N. Al-Qadi2
1Jordan University of Science and Technology, Irbid, Jordan.
2Ministry of Municipal affairs, Department of Services and Projects,
Amman, Jordan.
ABSTRACT
The main objective of this research is to determine the effect of oil shale ash on dynamic creep
of asphalt concrete mixtures. Oil shale ash was used as an additive to the asphalt concrete
mixtures with five-ash contents (0, 5, 10, 15 and 20%) by volume of binder. Then, they were
exposed to simulation of creep test through Universal Testing Machine (UTM). Three testing
temperature levels (5, 25 and 40°C) resembling cold, moderate and high levels of temperature
were considered and three loading frequencies (1, 4 and 8 Hz) were used. Oil shale ash is an air
and water pollutant by product of shale rock. This research attempts to recycle oil shale ash by
using it as an additive to the asphalt. Further more, the use of ash decreases the economic cost
of constructing asphalt mix. Finally, it has been found that the addition of optimum percentage
(12.5%) of ash increases the quality and performance of asphalt concrete mixtures by reducing
rutting based on statistical analysis of data.
Keywords: Oil shale ash, Creep, Asphalt mixtures, Resilient modulus, Stiffness, Strain.
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