Analysis of viscosity influencing factors and viscous flow properties for rubber asphalt
[1]Ding Zhan,Jiang Xiuming,Zhao Junkai,et al.Analysis of viscosity influencing factors and viscous flow properties for rubber asphalt[J].Journal of Zhengzhou University (Engineering Science),2019,40(03):57-62.[doi:10.13705/j.issn.1671-6833.2018.06.007]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
40
Number of periods:
2019 03
Page number:
57-62
Column:
Public date:
2019-04-30
- Title:
- Analysis of viscosity influencing factors and viscous flow properties for rubber asphalt
- Keywords:
- rubberized asphalt; viscosity; Influencing factors; viscous properties; viscous activation energy
- CLC:
- -
- Abstract:
- To investigate the influencing factors of viscosity and viscous flow properties of rubber asphalt, rubber asphalt (RA) samples were prepared under different conditions of mixing temperature and processing time for different rubber dosage. Brookfield viscosity tests were carried out on RA samples, and the effect of these factors on viscosity of RA was analyzed. The visco-flow activation energy（Eη）of RA was calculated using Arrhenius equation according to the viscosity values of asphalt under different temperatures. The changing regularity of Eη was analyzed. The results and analysis indicate that the viscosity values of RA increase by the exponential growth model continuously with the increase of rubber content. There is a certain equivalence for rubber asphalt viscosity between raising mixing temperature and extending the processing time. But too high temperature or too much time may lead to excessive degradation of rubber molecules, which will cause the decrease of RA viscosity. With the increase in the dosage of crumb rubber, Eη of RA for origin or aged samples both goes up first and then drops down. And peak Eη exists in the range of rubber content from 10% to 15%. The Eη value of aged RA is bigger than that of original sample for the same rubber dosage. From the consideration of viscosity factors and viscous flow properties, the processing conditions are recommended that the dosage of crumb rubber is 15%~25%, preparation temperature is 180 ℃ and the processing time is 90 min approximately based on this research.
- References:
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Last Update:
2019-04-16