Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/30013
Title: The viscosity-reducing mechanism of organic wax additive on CRMA
Authors: Yu, X
Wang, Y 
Wei, T
Keywords: Crumb rubber modified asphalt (CRMA)
Mechanism
Organic wax additives
Viscosity-reducing
Issue Date: 2013
Publisher: Editorial Office of the Journal of the University
Source: Journal of Wuhan University of Technology. Materials science edition, 2013, v. 28, no. 4, p. 726-732 How to cite?
Journal: Journal of Wuhan University of Technology. Materials science edition 
Abstract: CRMA was prepared by mixing PG 64-22 asphalt with crumb rubber powder of 40 mesh size and 18% by weight of the asphalt. Sasobit®, a typical organic wax additive, was selected and added into CRMA. A series of tests, namely, brookfield viscosity, environmental scanning electron microscope(ESEM), component test, differential scanning calorimeter(DSC), fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance (NMR) were conducted on CRMA with and without organic wax additive, and microcosmic appearance, component content and molecular structure of various asphalt binders were obtained. The test results indicate that the addition of Sasobit® into CRMA can effectively change the contents of components: the content of asphaltenes increases relatively, while saturates decreases. In addition, the interaction between various components of CRMA is weakened, and the state of equilibrium between the dispersant and dispersed phase is changed at the same time. That is why the viscosity decreases after the organic wax additive is added into CRMA.
URI: http://hdl.handle.net/10397/30013
ISSN: 1000-2413
DOI: 10.1007/s11595-013-0760-z
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