[1]乐金朝,张世兴,乐明静,等.不同损伤度和愈合温度条件下沥青胶浆自愈合行为研究[J].郑州大学学报(工学版),2020,41(04):12-16.[doi:10.13705/j.issn.1671-6833.2019.04.007]
　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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不同损伤度和愈合温度条件下沥青胶浆自愈合行为研究()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
41
期数:
2020年04期
页码:
12-16
栏目:
出版日期:
2020-08-12

文章信息/Info

Title:
Study on Self-healing Behavior of Asphalt Mastic under Different Damage Degree and Healing Temperature
作者:
乐金朝; 张世兴; 乐明静; 李瑞霞
郑州大学水利科学与工程学院
Author(s):
YUE Jinchao; ZHANG Shixing; YUE Mingjing; LI Ruixia
School of Water Conservancy Science and Engineering，Zhengzhou University，Zhengzhou 450001,China
关键词:
沥青胶浆' target="_blank" rel="external">">沥青胶浆; 岩沥青; 疲劳损伤; 自愈合; 愈合机理; 
Keywords:
asphalt mastic; rock asphalt; fatigue damage; self-healing; self-healing mechanism
DOI:
10.13705/j.issn.1671-6833.2019.04.007
文献标志码:
A
摘要:
为探讨不同损伤度和愈合温度条件下沥青胶浆自愈合行为变化规律，以基质沥青胶浆和岩沥青胶浆为研究对象。利用动态剪切流变仪（DSR）对不同疲劳试样施以0.001%小应变进行愈合监测，观测并分析愈合阶段内不同损伤度、愈合温度条件下两种沥青胶浆自愈合性能恢复时间与过程。结果表明：中温阶段不同损伤度的两种沥青胶浆愈合曲线均呈总体增长趋势，发展形态表现为“两段”型，即呈“半抛物线”状的增长型曲线和“水平”状的稳定型曲线。中温范围内通过提升自愈温度对沥青胶浆自愈速率的增强越来越弱。沥青胶浆存在阈值损伤度，当疲劳损伤超过阈值损伤度时，沥青胶浆丧失恢复到初始状态的愈合能力，其中愈合温度25℃时基质沥青胶浆和岩沥青胶浆的阈值损伤度分别为50%、55%。岩沥青的掺入增大了分子作用力，显著提升沥青胶浆的粘聚性愈合强度与效率，但分子流动性的降低会削弱初始阶段粘附性愈合性能。
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.

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更新日期/Last Update: 2020-10-06