抄録
Bitumen penetration grade 80/100 was modified with oil palm fruit ash (OPFA) to improve its resistance to the change of pavement temperature and its physical properties. OPFA is a waste by product of palm oil mill, the ash of burning mesocarp of palm oil fruitlets. OPFA with uniform grain size less than 0.075 mm was added to the bitumen 2.5, 5, 7.5, and 10% by weight of the bitumen. The mixtures of OPFA and bitumen or OPFA-modified bitumen (OPFA-MB) as well as the base bitumen then were aged using rolling thin film oven (RTFO) and pressure aging vessel (PAV) prior to rheological testing using dynamic shear rheometer (DSR), bending beam rheometer (BBR), and direct tension tester (DTT). The results show that OPFA-MB content 5% OPFA can resist permanent deformation or rutting at high temperature 70 degree Centigrade, fatigue cracking at intermediate temperature 20 degree Centigrade, and thermal cracking at low temperature -15 degree Centigrade.
