Marshall Stability of Porous Asphalt Mixture Incorporating Kenaf Fiber

Porous asphalt mixture (PA), known as open-graded surfaces over a stone bed underneath,
allows water to go through. These factors can affect the porous asphalt mixture adhesive strength. The
high amount of course aggregate promotes the structure of air voids have certain impacts on the acoustic
properties of porous asphalt. The materials properties are consisting of both aggregate and bitumen
tests. This study also details out the aggregates sieve analysis test to develop new aggregate gradation for
PA. According to five ASEAN countries’ specifications, the sieve analysis test was done. The countries
included are Malaysia, Vietnam, Thailand, Singapore, and Indonesia. The test for the binder includes
the softening point, penetration, and ductility. This study also investigates the addition of kenaf fiber in
the mixture as an additive. Mechanical performance test for PA using Marshall Stability test to identify
the strength and the properties of the conventional PA with the addition of kenaf fiber compared to the
new gradation of PA incorporating kenaf fiber. From the results, the addition of 0.3% kenaf modified
PA improved the performance of PA in terms of Marshall Stability and volumetric properties.