基于时温等效的纳米碳粉改性沥青黏弹行为  

Viscoelastic behavior of carbon nano powder modified asphalt based on time-temperature equivalence

作　　者：郭风春 毕海鹏[2] 王海涛 吴树正 杨泓雨 GUO Feng-chun;BI Hai-peng;WANG Hai-tao;WU Shu-zheng;YANG Hong-yu(China First Highway Engineering Company Limited,Beijing 100024,China;College of Transportation,Jilin University,Changchun 130022,China)

机构地区：[1]中交一公局,北京100024 [2]吉林大学交通学院,长春130022

出　　处：《吉林大学学报(工学版)》2025年第1期221-229,共9页Journal of Jilin University:Engineering and Technology Edition

基　　金：吉林省教育厅科研项目(JJKH20211113KJ)。

摘　　要：为了解纳米碳粉改性沥青的高低温黏弹行为,本文将基于多温度多重应力蠕变恢复试验及低温松弛试验,结合时温等效原理,对纳米碳粉改性沥青的蠕变及松弛行为进行分析。随后结合Laplace卷积积分,反演并验证纳米碳粉改性沥青的低温松弛行为。结果表明,在中低温环境下,纳米碳粉改性沥青弹性稳定性较强,应力敏感程度较低。短期蠕变柔量较小,长期蠕变柔量增长明显,应力松弛效应显著。本文提出的反演松弛模量方法与低温松弛试验模量曲线Pearson相关性为0.911。本文为纳米碳粉改性沥青的应用提供试验及理论参考,同时提供一种有效反演纳米碳粉改性沥青低温松弛行为的方法。In order to understand the high and low temperature viscoelastic behavior of carbon nano powder modified asphalt, this paper will analyze the creep and relaxation behavior of carbon nano powder modified asphalt based on multi-temperature and multi-stress creep recovery test and low-temperature relaxation test, combined with the principle of time-temperature equivalence. Subsequently, the low-temperature relaxation behavior of carbon nano powder modified asphalt was inverted and verified by combining the Laplace convolution integral. The results show that the carbon nano powder modified asphalt has stronger elastic stability and lower stress sensitivity at low and medium temperatures. The short-term creep flexural volume is small, the long-term creep flexural volume grows significantly, and the stress relaxation effect is significant. The Pearson correlation between the inverse relaxation modulus method proposed in this paper and the modulus curve of low-temperature relaxation test is 0.911. This study will provide experimental and theoretical references for the application of carbon nano powder modified asphalt, and at the same time, provide an effective inverse relaxation behavior of low-temperature relaxation of carbon nano powder modified asphalt.

关 键 词：道路工程 纳米碳粉改性沥青 黏弹行为 时温等效原理 Laplace卷积积分 

分 类 号：U416[交通运输工程—道路与铁道工程]