|Table of Contents|

Comparison of rheological properties between SBS, rubber and
highviscosity modified asphalt binders
(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2020年1期
Page:
135-142
Research Field:
道路工程
Publishing date:

Info

Title:
Comparison of rheological properties between SBS, rubber and
highviscosity modified asphalt binders
Author(s):
YUAN Dongdong1;  JIANG Wei1; 2;  XIAO Jingjing3;  ZHOU Bo1; 
JIA Meng1; WANG Wentong1
1. School of Highway， Changan University， Xian 710064, Shaanxi, China； 2. Key Laboratory for SpecialArea Highway Engineering of Ministry of Education, Changan University, Xian 710064, Shaanxi, China；
3. School of Civil Engineering, Changan University, Xian 710061, Shaanxi, China
Keywords:
road engineering;  modified asphalt;  rheological theory;  hightemperature performance;  lowtemperature performance
PACS:
-
DOI:
-
Abstract:
To fully understand the high and lowtemperature rheological properties of different modified asphalt binders in the same evaluation system, a dynamic shear rheometer was used to conduct a strain sweep test to determine the linear viscoelastic range of styrenebutadienestyrene (SBS) modified asphalt binder, rubber modified asphalt binder, and highviscosity modified asphalt binder. This rheometer was also utilized to perform the frequency sweep test and multiple stress creep recovery tests to analyze their hightemperature properties. Meanwhile, a bending beam rheometer was used to carry out bending creep stiffness tests to analyze their lowtemperature properties. The results show that according to the strain sweep test, the SBS, rubber, and highviscosity modified asphalt binders are within the range of linear viscoelasticity at less than 10% strains. Based on the frequency sweep test result, their complex shear modulus main curves fitted by the Sigmoidal model are smooth and continuous, they are all simple rheological materials. There are great differences in the complex shear moduli of the SBS, rubber, and high viscosity modified asphalt binders at low frequencies. These differences are relatively small at high frequencies. The multiple stress creep recovery test result shows that compared with the SBS and highviscosity modified asphalt binders, the rubber modified asphalt binder has larger flow deformation characteristics. Furthermore, the highviscosity modified asphalt binder has better resistance to permanent deformation than rubber and SBS modified asphalt binders. According to the lowtemperature bending creep stiffness test result, both creep stiffness and creep rate are exponentially related to temperature. Through the creep stiffness and creep rate, it is determined that the lowtemperature cracking resistance of the highviscosity modified asphalt binder is better than that of SBS and rubber modified asphalt binders. Furthermore, the result of lowtemperature sensitivity assessed by the creep stiffness index demonstrates that the temperature sensitivity of the highviscosity modified asphalt binder is smaller than that of SBS and rubber modified asphalt binders. Therefore, the high and lowtemperature rheological behaviors of the highviscosity modified asphalt binder are superior to those of the SBS and rubber modified asphalt binders.
 3 tabs, 10 figs, 29 refs.

References:

Memo

Memo:
-
Last Update: 2020-01-17