Rutting and fatigue cracking are two apparent failure modes in a flexible
pavement. They do not only shorten the performance life of a pavement but also
require a lot of money and energy on repair works. This study presents a
laboratory investigation of combining asphaltic concrete bituminous mix (AC) as
wearing course and hot-rolled asphalt (HRA) binder course in road surfacing
structure to overcome the problems. Four types of mixtures namely AC with 80
PEN bitumen grade (AC(80)), AC with 50 PEN bitumen grade (AC(50)), HRA
with 50 PEN bitumen grade (HRA(50)) and HRA with 80 PEN bitumen grade
(HRA(80)) were made as control specimens to compare the performance of the
combination of AC wearing course and HRA hinder course, (AC(80)+HRA(50)).
Results from dynamic creep test and wheel tracking test confirm that AC is more
superior in reducing rutting. The combined mix provides promising findings when
it surpasses rutting performance when compared to normal AC. Meanwhile HRA
mix shows a longer fatigue life compared to AC. The combined mix
(AC(80)+HRA(50)) shows a better resistance towards fatigue compared to
AC(80). At low strain level, the former achieved a fatigue life of 1E+8 cycles
while a fatigue life for the latter mix is only 9.98E+5 cycles. Thus, the usage of
combined mix has potential to improve the road surfacing performance
