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材料导报  2022, Vol. 36 Issue (11): 21010089-5    https://doi.org/10.11896/cldb.21010089
  无机非金属及其复合材料 |
生物重油对老化50#沥青的再生效果评价
范世平1, 朱洪洲1,2, 钟伟明3
1 重庆交通大学土木工程学院, 重庆 400074
2 交通土建工程材料国家地方联合实验室, 重庆 400074
3 湖南省交通科学研究院有限公司, 长沙 410015
Rejuvenation Effect Evaluation of Heavy Bio-oil on Aging 50# Asphalt
FAN Shiping1, ZHU Hongzhou1,2, ZHONG Weiming3
1 School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China
2 National & Local Joint Engineering Laboratory of Transportation and Civil Engineering Materials, Chongqing 400074, China
3 Hunan Communications Research Institute Co., Ltd., Changsha 410015, China
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摘要 为评价生物重油对老化50#沥青的再生效果,采用旋转薄膜烘箱试验(RTFOT)对50#沥青进行老化,然后在老化沥青中掺入生物重油,使用高速剪切机制备生物重油再生沥青。最后通过沥青基本性能试验和动态剪切流变仪(DSR)分析沥青的高温流变特性及疲劳性能。此外,使用热重分析(TGA)和差示扫描量热法(DSC)研究生物重油的热稳定性。研究结果表明:在25~200 ℃,生物重油的质量损失仅为0.35%,说明生物重油具有较好的热稳定性。生物重油对老化50#沥青的再生效果显著,随着生物重油含量的增加,再生沥青的针入度、延度、相位角和复数模量指数均增大,而软化点、车辙因子和疲劳因子降低,即沥青黏性特征、低温抗裂性和疲劳耐久性增强,但是高温抗车辙性能降低。加载频率越小,沥青黏性特征越强,抗车辙性能越弱,在低速交通荷载下,沥青易产生不可恢复的永久变形和车辙病害。本工作建议生物重油掺量不宜超过6%。
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范世平
朱洪洲
钟伟明
关键词:  道路工程  老化50#沥青  生物重油  DSR试验  流变特性  热重分析    
Abstract: This work investigated the rejuvenating effect of heavy bio-oil on an aged 50# asphalt binder. Herein, the 50# asphalt binder was aged by using the rotary film oven test (RTFOT); subsequently, the heavy bio-oil was mixed into the aged asphalt binder, and the heavy bio-oil rejuvenated asphalt was prepared by using a high-speed shear machine. Finally, through physical property tests and dynamic shear rheology (DSR) tests, the rheological and fatigue properties of all asphalt binders were analyzed. Consequently, by using the results of the aforementioned tests, the rejuvenation effect of heavy bio-oil on the properties of aged asphalt binders was discussed. In addition, the thermal stability of heavy bio-oil was studied though thermogravimetric analysis (TGA) and the differential scanning calorimetry (DSC) test. The results demonstrated that the mass loss of the heavy bio-oil was only 0.35% in the temperature interval of 25—200 ℃, which indicated a good thermal stability. The heavy bio-oil improved the penetration and ductility, and reduced the softening point of aged asphalt. With the increase in heavy bio-oil content, the rutting factor and fatigue factor of rejuvenated asphalt binders decreased, while the phase angle and complex modulus index increased, which indicated that the asphalt viscosity characteristics, temperature sensitivity and fatigue durability were enhanced with the high-temperature rutting resistance weakened. Furthermore, as the loading frequency was decreased, the asphalt viscosity characteristics were enhanced, and the rutting resistance was weakened. The asphalt is more prone to irreversible permanent deformation and rutting damage under low-speed traffic loading. According to the results obtained in this work, it is recommended that the amount of heavy bio-oil admixture should not exceed 6%.
Key words:  road engineering    aged 50# asphalt    heavy bio-oil    DSR test    rheological property    thermogravimetric analysis
发布日期:  2022-06-09
ZTFLH:  U414  
基金资助: 高寒高海拔地区道路工程安全与健康国家重点实验室开放基金(YGY 2017 KYPT-02)
通讯作者:  zhuhongzhouchina@cqjtu.edu.cn   
作者简介:  范世平,2018 年毕业于重庆交通大学,获工学硕士学位。现为重庆交通大学土木工程学院博士研究生,指导老师为朱洪洲教授。主要从事沥青路面结构与材料性能方面的研究。
朱洪洲,现为重庆交通大学土木工程学院教授、博士研究生导师,1998年毕业于重庆交通学院(现重庆交通大学),获学士学位;2001年毕业于重庆交通学院(现重庆交通大学),获工学硕士学位;2005年毕业于东南大学,获工学博士学位,2013—2014年公派美国罗格斯新泽西州立大学作访问学者。近年来主持国家自然科学基金项目2项、科技部重点专项子课题1项、交通运输部建设科技项目2项,参编行业和地方标准规范4部,发表科研论文90余篇,主要从事功能性路面、路面材料疲劳损伤理论等方面的研究。
引用本文:    
范世平, 朱洪洲, 钟伟明. 生物重油对老化50#沥青的再生效果评价[J]. 材料导报, 2022, 36(11): 21010089-5.
FAN Shiping, ZHU Hongzhou, ZHONG Weiming. Rejuvenation Effect Evaluation of Heavy Bio-oil on Aging 50# Asphalt. Materials Reports, 2022, 36(11): 21010089-5.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.21010089  或          http://www.mater-rep.com/CN/Y2022/V36/I11/21010089
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