Abstract:
Transportation infrastructure plays a key role in the everyday life of social beings.
For its design, highway agencies focus on appropriate and cost-effective design technique
s for this purpose Engineers are carrying research on Rock Wool Fiber to introduce it as a
Pavement modifier in Market. The use of RWF will not only reduce the use of our natural
resources but also help in using the waste materials (i.e., slag from steel mill) for a useful
purpose, meeting economic and environmental friendly needs of a country.
Pavements over time gets damaged by rutting, fatigue, moisture susceptibility
render it unusable for vehicles. Therefore, it is needed to have such design which are cost
effective and environment friendly. The use of Rock wool Fiber acts as a distinct part in
achieving national prosperity. This project is based on evaluating the performance of Hot
Mix Asphalt (HMA) by using different contents of Rock Wool fiber as an additive in
Asphalt Concrete. NHA gradation B, PARCO grade 60/70 Bitumen and RWF from
INCOM ROCKWOOL LTD Karachi were used in this study. Penetration, Ductility and
Temperature testing were done on virgin bitumen. The RWF contents used were 0%, 0.4%,
0.6% and 0.8% of Bitumen content. Performance testing was done after finding out the
OBC, volumetric, stability and flow of AC mixtures. Using those OBC and adding RWF
as an additive in bitumen, different samples were formed and tested for evaluation and
compared with the performance testing results of AC mixtures without RWF. Moisture
Susceptibility Test using Universal Testing Machine (UTM) was performed for
performance evaluation.
