Study on Self-healing Behavior of Asphalt Mastic under Different Damage Degree and Healing Temperature
[1]YUE Jinchao,ZHANG Shixing,YUE Mingjing,et al.Study on Self-healing Behavior of Asphalt Mastic under Different Damage Degree and Healing Temperature[J].Journal of Zhengzhou University (Engineering Science),2020,41(04):12-16.[doi:10.13705/j.issn.1671-6833.2019.04.007]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
41
Number of periods:
2020 04
Page number:
12-16
Column:
Public date:
2020-08-12
- Title:
- Study on Self-healing Behavior of Asphalt Mastic under Different Damage Degree and Healing Temperature
- CLC:
- -
- DOI:
- 10.13705/j.issn.1671-6833.2019.04.007
- Abstract:
- This study aimed explore the evolution process of the self-healing behavior of asphalt mastics in different damage degrees and healing temperatures.The virgin asphalt mastic and rock asphalt mastic were used as the research objects.The Dynamic Shear Rheometer was used to examine the application of 0.001% small strain to different fatigue samples.The self-healing behavior of two asphalt mastics under different damage degrees and healing temperatures were observed during the healing period.The results showed that in the middle temperature stage,the self-healing curves of the two asphalt mastics under different damage degrees showed an overall growth trend,and the specific performance was a “two-stage” type,that was,a growth and development type before self-healing and a stable curve after self-healing .In the middle temperature stage,the effect of increasing the healing temperature on the healing rate of asphalt mastics become weaker and weaker.There was a certain threshold for the damage degree of asphalt mastic.When the fatigue damage degree was lower than the threshold damage degree,the asphalt mastic could be restored to the initial state.When the healing temperature was 25 ℃,the threshold damage degrees of virgin asphalt mastic and rock asphalt mastic were 50% and 55% respectively.The incorporation of rock asphalt increased the molecular force,and significantly improved the cohesive healing strength and rate of asphalt mastic,but at the same time its molecular fluidity was reduced,thereby weakening the initial stage of adhesive healing properties.
- References:
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Last Update:
2020-10-06