[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]
　Lejin jinzhao,Zhang Shixing,Le mingjing,et al.Self-healing of Asphalt Mortar with Different Damage and Healing Temperature Conditions[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:
Self-healing of Asphalt Mortar with Different Damage and Healing Temperature Conditions
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):
Lejin jinzhao; Zhang Shixing; Le mingjing; Li Ruixia
College of Water Conservancy Science and Engineering, Zhengzhou University
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 slurry; rock asphalt; fatigue injury; Self-healing; 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:
In order to explore the evolution process of self-healing behavior of asphalt mortar,matrix asphalt mortar and rock asphalt mortar were studied. Healing monitoring of different fatigue specimens with 0.001% small strain was carried out by the Dynamic Shear Rheometer(DSR). The self-healing behavior of two asphalt mortar under different damage degree and healing temperature was observed during the healing period.The mechanism of damage and healing temperature on self-healing was analyzed .The results show that The asphalt rubber healing curve showed an overall growth trend, and the development pattern showed a two-stage type, that is a “semi-parabolic” growth curve and a “horizontal” stable curve.In the middle temperature stage, the self-healing ability of asphalt mortar can be enhanced by increasing the self-healing temperature. There is a certain threshold damage degree in asphalt mortar. When the fatigue damage exceeds the threshold damage degree, the asphalt mortar loses the healing ability to return to the initial state. At 25 °C healing temperature the threshold damage of matrix asphalt mortar and rock asphalt mortar is 50% and 55%, respectively. The incorporation of rock asphalt will significantly improve the self-healing ability of the asphalt mortar. But rock asphalt will reduce the self-healing properties of the asphalt mortar in the initial stage.

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更新日期/Last Update: 2020-10-06