Rheological Property of Bitumen Modified by the Mixture of the Mechanochemically Devulcanized Tire Rubber Powder and SBS
Publication: Journal of Materials in Civil Engineering
Volume 21, Issue 11
Abstract
The mechanochemically devulcanized ground tire rubber ( -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, ductility, and aging test) and rheological properties of bitumens modified by 8, 10, and -GTR/SBS were investigated in this paper. The conventional properties except penetration of -GTR/SBS modified bitumen were improved, compared with SBS modified bitumen. Rheological data demonstrated that all of the testing results of -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 -GTR/SBS mixed powder had a better interface adhesion with matrix than SBS.
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Acknowledgments
This research is supported by National High Technology Research and Development Program (863 Program, Grant No. UNSPECIFIED2008AA06Z343), and the writer thank the Analytical and Testing Center of Sichuan University for providing SEM measurement facility.
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Information & Authors
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Published In
Journal of Materials in Civil Engineering
Volume 21 • Issue 11 • November 2009
Pages: 699 - 705
Copyright
© 2009 ASCE.
History
Received: May 6, 2008
Accepted: May 19, 2009
Published online: Oct 15, 2009
Published in print: Nov 2009
Notes
Note. Associate Editor: Shin-Che Huang
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