Construction Research Institute of Malaysia (CREAM)
Abstract
The vast amount of waste cooking oil (WCO) has invited odds effects on the environment when
disposed of improperly. Incorporating waste materials into asphalt mixture is common practice
these days as it minimizes the amount of waste material as well as improves the performance
of the mixture. WCO is known for its natural fluidity characteristics, wherein affecting good
cracking performance at low temperature, yet indicate poor rutting resistance at high
temperature. Plus, less strength in porous asphalt has worsened the rutting condition. Hence,
pretreatment of WCO is suggested before the modification was done. In this study, WCO is
being treated with chemical treatment of the transesterification process. Then, the modified
binder of 5%, 10%, 15% and 20% untreated and treated WCO were tested with physical testing
of penetration and softening point temperature. Later, a similar percentage of untreated and
treated WCO were incorporated into porous asphalt mixture to analyze the mechanical
performance of Marshall Stability, Flow and Stiffness. The result of porous asphalt mixture with
10% treated WCO showed an improvement in Marshall Stability, Flow and Stiffness. It can be
concluded, samples with treated WCO indicated remarkable performance in terms of physical
and mechanical evaluation, owing to similar polarity which enhances good interaction bonding
that strengthens the asphalt mixture