DESIGN AND PROPERTIES OF SPLIT MASTIC ASPHALT MODIFIED WITH BAGASSE ASH
ABDALLH .A.A.LHWAINT - S941302029 - Pascasarjana
Go green campaign is one of ways to save the earth from garbage. This campaign
not only suggests recycling and reducing but also reusing the garbage. In line with
the go green campaign, the aim of this study is to achieve the viability of using
Bagasse Ash (BA) as additive material in hot mix Split Mastic Asphalt (SMA)
with certain comparison which is expected to improve the quality of SMA.
This research was conducted by using experiment research design in comparison
among the three types of (without BA and with BA) properties of the hot SMA
toward the Marshall properties (stability, flow, Marshall Quotient (MQ), Void In
Total Mix (VITM), Void Filled Without Asphalt (VFWA),and Air Void to get
Optimum Bitumen Content ,Indirect Tensile Strength (ITS) at different
temperature (20oC,40oC,60oC) and Unconfined compressive at same temperature
room at 27oC but different percentage of BA (3%,4% ,5%).
The results of this research are as follows: 1) the properties of the hot mix SMA
toward the Marshall properties are: The stability value of SMA with BA is higher
than SMA without BA by 3%; The flow value of SMA with BA is lower than
SMA without BA by 5.5%; The Marshall Quotient value of SMA with BA is
higher than SMA without BA by 5%; The Air void value of SMA with BA is
lower than SMA withoutBA by 3%; The VFWA value of SMA with Bagasse Ash
is higher than SMA without BA by 75.87%; The Air Void value of SMA with BA
is lower than SMA without BA by 2%.In terms of ITS value, the value of ITS is
high when BA is combined with low temperature; but when the temperature is
increased, the value of ITS decreases. Moreover, in terms of UCS, the value of
UCS of BA mixture is higher than SMA and higher than normal mixture at
normal temperature. The recommendation of this research is that a certain
percentage of air voids is necessary in all dense-graded mixes to prevent the
pavement from flushing, shoving, and rutting. Air voids may be increased or
decreased by lowering or raising the binder content. They may also be increased
or decreased by controlling the amount of material passing the No. 200 sieve in
the HMA. The more fines added to the HMA generally the lower the air voids.
The air voids may be changed by varying the aggregate gradation in the HMA.
Keywords: Bagasse Ash, Split Mastic Asphalt, ITS, UCS