Analysis of Dynamic Response Master Curve of Carbon Black Modified Asphalt Mixture
[1]Li Peilong,Ma Songsong,Li Jiange,et al.Analysis of Dynamic Response Master Curve of Carbon Black Modified Asphalt Mixture[J].Journal of Zhengzhou University (Engineering Science),2018,39(04):12-18.[doi:10.13705/j.issn.1671-6833.2018.01.022]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
39
Number of periods:
2018 04
Page number:
12-18
Column:
Public date:
2018-07-22
- Title:
- Analysis of Dynamic Response Master Curve of Carbon Black Modified Asphalt Mixture
- Keywords:
- Simple performance test (SPT); dynamic modulus; phase angle; carbon black modified asphalt mixture; road engineering
- CLC:
- -
- Abstract:
- In order to analyze the dynamic response of carbon black modified asphalt mixture (CBMAM), the Simple Performance Test (SPT) was conducted on CBMAM and base asphalt mixture under the different test conditions of test temperature and loading frequency. The change law of gynamic modulus and phase angle for the two mixtures was analyzed.Using the Sigmoidal model, the shift factor of dynamic modulus and model parameters were gained according to the data. The master curves of dynamic modulus and phase angle of asphalt mixture are obtained and analyzed comparatively. The results indicate that the activation energy (ΔEa) and the absolute value of shift factor (log[α(T)]) of CBMAM are smaller than those of base asphalt mixture respectively at the temperatures lower than the reference temperature, while they are contrary at the temperatures higher than the reference temperature. The master curve of dynamic modulus goes up like "S" curve continuously with an increase in loading frequency. Phase angles of asphalt mixtures go up firstly and then drop with the increase in frequency. But the master curves of phase angle are not as smooth as those of dynamic modulus especially at high temperatures.The dynamic modulus master curve and shift factor can reflect the effect of loading frequency and temperature on the visco-elastic response of CBMAM. The dynamic modulus of CBMAM is bigger at temperatures lower than 37.8℃, which has better resistance to deformation. When the temperature increases higher than 37.8℃, there is no significant difference in the dynamic response of the two mixtures, the modification effect of carbon black for asphalt mixture is no very significant under the conditions of low frequency and high temperature.
- References:
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Last Update:
2018-07-24
