[1]杨永强,康秉铎,郭海东,等.活化胶粉/SBS复合改性沥青短期老化性能[J].长安大学学报(自然科学版),2021,41(5):23-33.
　YANG Yong qiang,KANG Bing duo,GUO Hai dong,et al.Short-term aging performance of activated rubber powder/SBScomposite modified asphalt[J].Journal of Chang’an University (Natural Science Edition),2021,41(5):23-33.
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活化胶粉/SBS复合改性沥青短期老化性能()
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长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
第41卷
期数:
2021年5期
页码:
23-33
栏目:
道路工程
出版日期:
2021-09-15

文章信息/Info

Title:
Short-term aging performance of activated rubber powder/SBScomposite modified asphalt
作者:
杨永强; 康秉铎; 郭海东; 马玉安; 况栋梁; 陈华鑫
(1. 青海省湟源公路总段，青海 西宁 812100； 2. 长安大学 材料科学与工程学院，陕西 西安 710061)
Author(s):
YANG Yongqiang1; 2;  KANG Bingduo2;  GUO Haidong1;  MA Yuan1; KUANG Dongliang2;  CHEN Huaxin2
(1. Qinghai Huangyuan Highway Section, Xining 812100, Qinghai, China; 2. School ofMaterials Science and Engineering， Changan University, Xian 710061, Shaanxi, China)
关键词:
道路工程; 沥青路面; 脱硫胶粉; 胶粉/SBS复合改性沥青; 短期老化; 路用性能
Keywords:
road engineering;  asphalt pavement;  desulfurization rubber powder;  rubber powder/SBS composite modified asphalt;  shortterm aging;  road performance
文献标志码:
A
摘要:
为了探究SBS复合改性对活化胶粉改性沥青短期老化性能的影响，采用沥青薄膜加热试验（TFOT）模拟复合改性沥青的短期老化行为，通过软化点、针入度、弹性恢复、黏度和测力延度试验对复合改性沥青老化前后的高温性能、低温性能及施工和易性进行评价；以软化点为主要指标，研究复合改性沥青在不同老化条件下的性能稳定性；结合扫描电镜（SEM）及体式显微镜分析活化胶粉/SBS复合改性沥青的微观形貌与短期老化性能的关联性。研究结果表明： 活化胶粉/SBS复合改性沥青经短期老化后的高温性能、低温性能及施工和易性相关指标变化幅度降低，SBS的加入改善了活化胶粉改性沥青的耐老化性能；活化胶粉/SBS复合改性沥青的软化点受老化时间及老化温度的影响较小，在不同短期老化条件下具有良好的稳定性；SBS与沥青形成的网状结构有效减缓了活化胶粉/SBS复合改性沥青短期老化期间胶粉的二次降解；体式显微镜照片中发现SBS的加入使活化胶粉/SBS复合改性沥青在短期老化过程中保持了相对稳定的多相结构， 有助于胶粉和SBS降解产物与沥青反应补充沥青中的组分，起到抗老化的目的。
Abstract:
In order to explore the effect of SBS composite modification on the shortterm aging performance of activated rubber powder modified asphalt, the shortterm aging behavior of composite modified asphalt was simulated by asphalt film heating test (TFOT), and the hightemperature performance, lowtemperature performance and workability of composite modified asphalt before and after aging were evaluated by softening point, penetration, elastic recovery, viscosity and force ductility tests. The softening point was taken as the main reference index, and the performance stability of composite modified asphalt under different aging conditions was studied. The correlation was analyzed by scanning electron microscope (SEM) and volume microscope between the micro morphology and shortterm aging properties of activated rubber powder/SBS composite modified asphalt. The results show that after shortterm aging, the changes of high temperature performance, low temperature performance and workability of activated rubber powder/SBS composite modified asphalt are reduced, and the addition of SBS improves the aging resistance of activated rubber powder modified asphalt. The softening point of activated rubber powder/SBS composite modified asphalt is less affected by the changes of aging time and aging temperature, and the composite modified asphalt has good stability under different shortterm aging conditions. The network structure formed by SBS and asphalt effectively slow down the secondary degradation of rubber powder during shortterm aging of activated rubber powder/SBS composite modification. The addition of SBS in the microscope show that the activated rubber powder /SBS composite modified asphalt maintain a relatively multiphase structure in the short term aging process. It is conducive to the rubber powder and SBS degradation products react with asphalt to supplement the components in the asphalt and play an antiaging role. 5 tabs, 14 figs, 30 refs.

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更新日期/Last Update: 2021-09-30