Abstract:
This study attempts to identify the sensitivity of modified Hot Mix Asphalt concrete for
temperature variation. Saw dust ash was used as a partial replacement of the conventional filler used
in contemporary road construction with Hot Mix Asphalt concrete. The samples were subjected to two
different temperature conditions modelled by a 20-minute period in a hot temperature bath under the
tested temperatures of 35°C and 60°C. The filler replacement was based on constant volume
exchange and a saw dust ash weight of 30g was introduced to the mix. The Marshall Stability and
Flow values of the modified Hot Mix Asphalt mixtures were recorded compared to two distinct control
samples each tested under same temperatures as the saw dust ash added samples. According to the
study, the saw dust addition will be highly vulnerable to malfunctioning under higher temperature
conditions. However, saw dust ash could still be used as a partial filler replacement under low
temperatures and for local roads with medium traffic.
