Engineering properties of SBS modified bitumen for paving mixes

During the last two decades, increased deformation of road structures due to the increased traffic volume and axle loads, construction errors as well as climatic conditions has been observed in many countries. In order to cope with the deformations that occur on pavements, several types of improvement of the engineering properties of asphalt pavement have been proposed, one of which is the utilization of polymers for bitumen modification. Currently the most used polymer is the elastomer styrene butadiene styrene (SBS) polymer. A laboratory evaluation of the effect of SBS polymer on the properties of the 50/70 penetration grade base (unmodified) bitumen was undertaken. SBS based polymer modified bitumen samples were prepared with different percentages (2-6%) of SBS polymer and their characteristics were determined by means of conventional test methods such as the penetration test, softening point, thin film oven test and storage stability test etc. The morphology and state of dispersion of the SBS polymer bitumen were also investigated using fluorescence microscopy at room temperature. The results gained from the study were evaluated. There was a decrease in penetration and an increase in softening point with increasing polymer content. For the covering abstract see ITRD E133040.

  • Authors:
    • SENGOZ, B
    • TOPAL, A
    • TANYEL, S
  • Publication Date: 2007-4


  • English

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Filing Info

  • Accession Number: 01060950
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Sep 10 2007 1:39PM