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Indexed by:期刊论文

Date of Publication:2013-07-01

Journal:NANOSCIENCE AND NANOTECHNOLOGY LETTERS

Included Journals:SCIE、EI、Scopus

Volume:5

Issue:7

Page Number:801-804

ISSN No.:1941-4900

Key Words:MWCNTs; Modified Asphalt; Dynamic Viscosity; Microscopic Mechanism

Abstract:The porous asphalt mixture has been accepted by people because of their excellent performance on drainage and absorption of the noise, but the conflict between its superior performance and durability needs to be solved with the high viscosity asphalt since the ordinary modified asphalt cannot meet the requirements. The orthogonal design is adopted to study the influence on dynamic viscosity of the asphalt at 60 degrees C of that added with MWCNTs, SBS or the combination. The experimental results show that the dynamic viscosity of asphalt at 60 degrees C added with MWCNTs or SBS has an increase of 36% and 12 times, respectively, compared with the matrix asphalt. Furthermore, the combination of MWCNTs and SBS with the same proportion yields the increase of dynamic viscosity by 54 times. Based on the observations of MWCNTs/SBS modified asphalt using the scanning electron microscope (SEM), we draw the conclusion that well-dispersed MWCNTs play a role in network filling, increasing the internal friction thus dynamic viscosity.