Rheological Property of Bitumen Modified by the Mixture of the Mechanochemically Devulcanized Tire Rubber Powder and SBS

The mechanochemically devulcanized ground tire rubber (m-GTR) prepared by solid-state mechanochemical reactor was used in the modification of bitumen with styrene-butadiene-styrene block (SBS) copolymer powder. The conventional properties (such as penetration index, softening point, 5° C ductility, and aging test) and rheological properties of bitumens modified by 8, 10, and 12 weight percent (wt %) m-GTR/SBS were investigated in this paper. The conventional properties except penetration of m-GTR/SBS modified bitumen were improved, compared with 5.5 wt % SBS modified bitumen. Rheological data demonstrated that all of the testing results of 10 wt % m-GTR/SBS modified bitumen were better than those of SBS modified bitumen under the condition of high temperature. The scanning electron microscope observation of the fractured surfaces showed that the m-GTR/SBS mixed powder had a better interface adhesion with matrix than SBS.

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  • Authors:
    • Zhu, Xiao-qing
    • Lu, Can-hui
    • Liang, Mei
  • Publication Date: 2009-11


  • English

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  • Accession Number: 01146008
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Dec 5 2009 4:30PM