Laboratory evaluation of properties of modified asphalt binder
with different types of additives
Esraa R. Al-gurah1*, Sahar J. Al-ghurabi2, Basim H. Al-Humeidawi2
1Civil Engineering Department, College of Engineering, University of Al-Qadisiyah,
Al-Diwaniyah province, Iraq
2Roads and Transport Engineering Department, College of Engineering, University of
Al-Qadisiyah, Al-Diwaniyah province, Iraq
2Roads and Transport Department, College of Engineering, University of Al-Qadisiyah,
Al-Diwaniyah province, Iraq

• Corresponding author e-mail: esraa.riadh@qu.edu.iq
  Abstract: This research aims to assess the properties of Polymer Modified Bitumen (PMB)
  binder prepared with different types of additives such as (Waste low density polyethylene
  (W-LDPE) and crumb rubbers (CR)and Styrene Butadiene Styrene (SBS)). Most of these
  additives are sustainable materials since it is derived from old scrap materials. All the
  above-mentioned materials (W-LDPE, CR and SBS) were added with percentages of (2, 4,
  and 6 percentage) of the weight of pure asphalt binder. Several tests were conducted to
  evaluated the properties of improved asphalt binder such as penetration test, Ductility test,
  Softening point test, Rotational viscosity test as well as thin-film oven test. The results of
  investigation revealed that, the using of different types of PMB significantly improved the
  physical properties and performance of asphalt. The using of sustainable waste materials
  such as W-LDPE and CR significantly improve the properties of PMB and contribute in
  recycling great amount of waste materials. Also, the results showed that the using of high
  percentage of SBS (6%) significantly increase the viscosity of asphalt binder and that can
  affect workability of Hot Mix Asphalt (HMA) compared with same percentages of WLDPE
  and CR).
  Keywords: Asphalt binder (Bitumen), Sustainable materials, Crumb rubbers, Physical
  properties, SBS, Waste low density polyethylene