Liaqat Ali,Abdul Farhan,Faisal Hayat,Yaseen Mahmood,Fawad Ahmad,




Shredded Rubbe,Fly ash, Ductility test,Flash and Fire point of bitumen,Marshall Stability test,


A huge quantity of waste material are produced i-e marble powder, shredded rubber, fly ash, stone dust, lime stone dust etc. from different sources. Modification of asphalt with such type of additives not only proved as cost effective and environmental friendly but can also improve asphalt properties. As asphalt is one the most expensive material used in the construction of flexible pavement and modification of asphalt with additives can make the pavement construction more economical. In this research an effort is made for the utilization of some waste materials such as fly ash and shredded rubber as an additive to improve the properties of asphalt i.e. ductility, penetration grade, flash and fire point of asphalt and marshal stability of asphalt mix. The asphalt was partially replaced with fly ash and shredded rubber in different percentages i.e. 0% (control) 3%, 5% and 7% by weight to bitumen. Total 90 specimen were prepared and were taken into laboratory for further investigation. The results showed that addition of 0% (control), 3%, 5% and 7% fly ash had no effect on flash and fire point of bitumen otherwise the addition of 3%, 5% and 7% of shredded rubber increased the flash point of bitumen from 191cº to 195cº, 200cº and 204cº and fire point from 198cº to 206cº, 208cº and 212cº respectively. The penetration test result showed that addition of fly ash and Shredded rubber up to 7 % decreases the value grade but the overall grade of the bitumen remained same, which was 60/70. Moreover the ductility value decreases with increase in percentage of fly ash and shredded rubber. Marshall Stability value of asphalt mix also increased with increase in percentage of fly ash and shredded rubber.


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Liaqat Ali, Abdul Farhan,Faisal Hayat, YaseenMahmood, Fawad Ahmad View Download