Short communication, Note

https://doi.org/10.15255/KUI.2016.019

Effects of SBS Configuration on Performance of High Modulus Bitumen Based on Dynamic Mechanical Analysis

Ming Liang ; State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266 580, P.R. China
Yong Hu ; State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266 580, P.R. China
Xiangjun Kong ; State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266 580, P.R. China
Weiyu Fan ; State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266 580, P.R. China
Xue Xin ; State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266 580, P.R. China
Hui Luo ; State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266 580, P.R. China

Abstract

High modulus bitumens modified by polystyrene-block-polybutadiene-block-polystyrene (SBS) with different molecular structure were investigated on dynamic shear rheometer and fluorescence microscopy to evaluate viscoelastic properties and morphology of binders. The results shows that storage modulus (G’) is obviously less than loss modulus (G”), which means viscous behaviour of bitumen is dominant, and anti-rutting factor (G* ⁄ sin δ) is markedly enhanced by star SBS than by linear SBS. The morphology indicated that star SBS improved the softening point more obviously, tending to form a cross-linked network in bitumen. As for linear SBS, it is dispersed in bitumen in the form of globules and enhances the ductility of binder.

Keywords

dynamic mechanical analysis; anti-rutting; microstructure; high modulus bitumen

Hrčak ID:

161954

URI

https://hrcak.srce.hr/161954

Publication date:

25.7.2016.

Article data in other languages: croatian

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