Full scale field performance study on SBS modified and conventional bitumen in bituminous concrete surface subjected to heavy traffic

In this paper findings of long term full scale comparative performance of styrene-butadiene-styrene (SBS) modified and conventional bituminous mixes under overloading conditions with high pavement temperature are reported. The laboratory results show that the performance of SBS modified bitumen is superior to conventional 60/70 bitumen. The resistance to rutting and moisture sensitivity of bituminous concrete with polymer modified bitumen (PMB)-40 (SBS modified) is observed better than conventional 60/70 (VG-30) bitumen. The values of stiffness modulus of bituminous mixes with PMB-40 (SBS modified) are observed higher than conventional 60/70 bitumen. Paper also deals with structural evaluation (by deflection test) and functional evaluation (by roughness test) of the selected road sections with SBS modified and conventional bitumen in bituminous concrete (BC) wearing coat, periodically for 60 months at an interval of about six months. The study includes the assessment of the performance of test sections based upon the time series pavement performance data (deflection, roughness and distresses). The progression of roughness in SBS modified surface is found less compared to surface laid with conventional 60/70 bitumen. The deflection of pavement is also marginally less in case of surface laid with SBS modified bitumen. The rut depth of sections is also observed less than 8 mm in case of SBS modified bitumen as compared to 10-12 mm in 60/70 bitumen sections, supporting laboratory test data of rut depth studies done using wheel tracking machine. The results indicated delayed pavement deterioration, besides higher service life of wearing course, when SBS modified bitumen is used in 40 mm thick bituminous concrete (BC) surface on a portion of national highway. The estimated extension in life is 50-75%.

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  • Supplemental Notes:
    • Abstract reprinted with permission from the publisher.
  • Authors:
    • Jain, P K
  • Publication Date: 2013


  • English

Media Info

  • Media Type: Print
  • Features: Appendices; Figures; References; Tables;
  • Pagination: pp 21-36
  • Serial:

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Filing Info

  • Accession Number: 01483071
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 4 2013 11:07AM