Effect of the Polypropylene Fibre as Replacement of Filler on Asphaltic Concrete Performance

Flexible pavement is extensively used in Malaysia as the construction cost of the pavement is lower compared to the rigid pavement. The uppermost layer of the flexible pavement called surface course, is made from asphalt bituminous mixture. This layer is a flexible layer where it can deform if subjected to great loads. The most popular defect that can be seen in flexible pavement is rutting. This study investigated the effect of Polypropylene (PP) fibre in influencing the behaviour and properties of the bituminous mixture when fully replaced as a filler and to evaluate the compressive strength of it. Marshall Mix Design was first used to obtain the optimum binder content and lastly, the specimens were compressed using Uniaxial Compressive Test machine to obtain its compressive strength. From the study, PP fibre reinforced bituminous mixture increased the compressive strength, the value of Marshall stability and help to reduce the flow. With all the stated effects, Polypropylene is ideal for replacing the conventional filler as it helps to strengthen the pavement layer and thus might be able to help save the maintenance cost for the constant repair of the conventional pavement layer.