|Table of Contents|

Rheological properties of warm mix asphalt rubber in wide range of pavement temperature(PDF)

《交通运输工程学报》[ISSN:1671-1637/CN:61-1369/U]

Issue:
2015年01期
Page:
1-9
Research Field:
道路与铁道工程
Publishing date:

Info

Title:
Rheological properties of warm mix asphalt rubber in wide range of pavement temperature
Author(s):
HE Liang1; 2; 3;  LING Tian-qing1;  MA Yu4;  MA Tao5;  HUANG Xiao-ming5
1. National and Local Joint Engineering Laboratory of Traffic Civil Engineering Materials, Chongqing Jiaotong University, Chongqing 400074, China; 2. Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang’an University, Xi’an 710064, Shaanxi, China; 3. Nottingham Transportation Engineering Centre, University of Nottingham, Nottingham NG7 2RD, Nottingham, UK;
Keywords:
pavement engineering;  pavement material;  warm mix asphalt rubber;  rheological properties;  wide range of pavement temperature
PACS:
U414.75
DOI:
-
Abstract:
In order to research the rheological properties of warm mix asphalt rubber, the asphalt rubber meeting the technical requirements in Asphalt Rubber for Highway Engineering(JT/T 798—2011)was prepared. The optimum content of warm mix additive Sasobit was determined from the warm mix effect and the impact of Sasobit on the technical indexes of warm mix asphalt rubber by viscosity-temperature relationship test and basic technical index test. The rheological properties of Sasobit warm mix asphalt rubber were evaluated in the wide range of pavement temperature at high(60, 70 ℃), medium(25 ℃)and low(5 ℃--24 ℃)temperatures. Analysis result shows that 3% is the optimum content of Sasobit in warm mix asphalt rubber. Sasobit can improve the high-temperature stability of asphalt rubber, its rutting factor at 70 ℃ increases by 79%, but Sasobit has no significant effect on the viscosity-toughness of asphalt rubber. The fatigue performance of asphalt rubber with 3% Sasobit reduces, its fatigue factor at 25 ℃ increases by 22%, but its fatigue performance is still better than that of SBS modified asphalt. Under the temperature condition of winter warm zone in Chinese standards for the climate zoning on asphalt pavement performance, as the temperature decreases, the low-temperature performance of Sasobit warm mix asphalt rubber is gradually better than that of SBS modified asphalt, its creep stiffness at -24 ℃ is 45% of creep stiffness of SBS modified asphalt, while Sasobit dosage has no excessive effect on the low-temperature performance of asphalt rubber, and the creep stiffness of asphalt rubber at -24 ℃ increases by 10%. 2 tabs, 8 figs, 21 refs.

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Last Update: 2015-02-25