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Effects of mixing procedures on the properties of polymer modified bitumen Mohan, SA ; Woldekidan, MF ; Qiu, J

By: Contributor(s): Publication details: Trondheim Akademika Publishing, 2013Description: s. 687-698ISBN:
  • 9788232102860
Subject(s): In: Bearing capacity of roads, railways and airfields: proceedings of the ninth International Conference on the Bearing Capacity of Roads, Railways and Airfields: Trondheim, Norway 25-27 June 2013Bibl.nr: VTI 2013.0053:2Location: Notes: Konferens: Ninth International Conference on the Bearing Capacity of Roads, Railways and Airfields, 2013, Trondheim Abstract: In this study two types of polymer pellets, Styrene-Butadiene-Styrene (SBS) and Ethylene Vinyl Acetate (EVA), were used to modify a 70/100 pen grade bitumen. Mixing variables such as, mixing speeds, mixing times and maturation times were considered in the polymer modification process. The influences of the mixing variables on the polymer modified binder were evaluated using conventional binder test methods and morphology study using florescence microscopy. The microscopy and conventional binder test result analysis in general showed the strong influence of mixing speed on polymer dispersion. The effects of mixing times on the binder test results were not distinct for both EVA and SBS polymers. The effect of pre/post stirring procedures on the binder test results was also found minimal, only the maximum speed used in the maturation process seem to influence the test results.
Item type: Reports, conferences, monographs
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Konferens: Ninth International Conference on the Bearing Capacity of Roads, Railways and Airfields, 2013, Trondheim

In this study two types of polymer pellets, Styrene-Butadiene-Styrene (SBS) and Ethylene Vinyl Acetate (EVA), were used to modify a 70/100 pen grade bitumen. Mixing variables such as, mixing speeds, mixing times and maturation times were considered in the polymer modification process. The influences of the mixing variables on the polymer modified binder were evaluated using conventional binder test methods and morphology study using florescence microscopy. The microscopy and conventional binder test result analysis in general showed the strong influence of mixing speed on polymer dispersion. The effects of mixing times on the binder test results were not distinct for both EVA and SBS polymers. The effect of pre/post stirring procedures on the binder test results was also found minimal, only the maximum speed used in the maturation process seem to influence the test results.