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材料导报  2023, Vol. 37 Issue (24): 22100098-7    https://doi.org/10.11896/cldb.22100098
  无机非金属及其复合材料 |
富油沥青砂浆再生设计与性能恢复规律研究
张吉哲1,*, 郭晨晨1, 胡学亮2, 何亮3, 吕鑫1, 樊超2, 姚占勇1
1 山东大学齐鲁交通学院,济南 250100
2 山东高速集团有限公司,济南 250098
3 重庆交通大学土木工程学院,重庆 400074
Study on Rejuvenating Design and Property Recovery of Reclaimed Rich-binder Asphalt Mortar
ZHANG Jizhe1,*, GUO Chenchen1, HU Xueliang2, HE Liang3, LYU Xin1, FAN Chao2, YAO Zhanyong1
1 School of Qilu Transportation, Shandong University, Jinan 250100, China
2 Shandong Hi-speed Group Engineering Detection Co., Ltd., Jinan 250098, China
3 School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China
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摘要 针对厂拌热再生技术沥青铣刨料利用率低、性能不稳定的问题,以精细化分离获取的富油细集料为研究对象,研究富油沥青砂浆的再生方法与性能恢复规律。首先系统分析了富油细集料的沥青含量与老化程度,选用不同再生剂对富油细集料进行再生设计,采用动态剪切流变试验、弯曲梁流变试验、直接拉伸试验、单轴压缩试验等手段,研究再生剂对沥青砂浆高温抗变形、低温抗开裂、疲劳寿命、变形协调等性能的恢复规律。研究结果表明,老化沥青砂浆抗压强度与复数模量显著提高,但其低温抗裂性能与疲劳寿命衰减显著,表明直接使用富油细集料会严重影响沥青砂浆的性能。由于再生剂对老化沥青的软化与还原,再生沥青砂浆的流变性能、低温抗裂性能与疲劳寿命得到明显的恢复,同时其变形协调能力得到了改善,而自制再生剂表现出较好的恢复效果。
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张吉哲
郭晨晨
胡学亮
何亮
吕鑫
樊超
姚占勇
关键词:  沥青铣刨料  沥青砂浆  再生剂  流变性能  疲劳寿命    
Abstract: Because of the low utilization rate and unstable performance of recycled asphalt mixtures, this paper focused on therich-binder fine aggregate and investigated the recovery law of rejuvenators on the performance of recycled asphalt mortar. First, the paper evaluated the bitumen content of rich-binder fine aggregate as well as the aging level of reclaimed bitumen. We used rich-binder fine aggregate to product recycled asphalt mortars and explore the contribution of rejuvenators on their performance. Evaluation methods which including dynamic shear rheometer, bending beam rheometer, direct tensile test, and uniaxial compression test were employed to investigate the recovery regulations of recycled asphalt mortars in high-temperature deformation resistance, low-temperature cracking resistance, fatigue life, and deformation coordination. Compared with ordinary asphalt mortar, the compressive strength and complex modulus of recycled asphalt mortar were significantly improved, but its cracking resistance at low temperature and fatigue life decline seriously. Because of the softening effect of rejuvenators on aged bitumen, the rheological behavior, low-temperature cracking resistance and fatigue life of the recycled asphalt mortar were obviously recovered, and the deformation coordination of the recycled asphalt mortar improved as well.
Key words:  reclaimed asphalt mixture    asphalt mortar    rejuvenator    rheological performance    fatigue life
发布日期:  2023-12-19
ZTFLH:  U414  
基金资助: 国家自然科学基金青年基金(51908331);山东省自然科学基金(ZR2019BEE004);山东省交通运输科技计划(2020B66)
通讯作者:  *张吉哲,山东大学齐鲁交通学院副研究员、硕士研究生导师。2009年山东轻工业学院无机非金属材料与工程本科毕业,2012年武汉理工大学建筑材料与工程专业硕士毕业,2016年美国诺丁汉大学土木工程专业博士毕业。2017—2019年在山东大学进行博士后工作,2019年至今在山东大学齐鲁交通学院任职副研究员。目前主要从事沥青混合料细观力学、新型路面材料、废旧路面材料再生利用等方面的研究工作。发表论文30余篇。jizhe.zhang@sdu.edu.cn   
引用本文:    
张吉哲, 郭晨晨, 胡学亮, 何亮, 吕鑫, 樊超, 姚占勇. 富油沥青砂浆再生设计与性能恢复规律研究[J]. 材料导报, 2023, 37(24): 22100098-7.
ZHANG Jizhe, GUO Chenchen, HU Xueliang, HE Liang, LYU Xin, FAN Chao, YAO Zhanyong. Study on Rejuvenating Design and Property Recovery of Reclaimed Rich-binder Asphalt Mortar. Materials Reports, 2023, 37(24): 22100098-7.
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http://www.mater-rep.com/CN/10.11896/cldb.22100098  或          http://www.mater-rep.com/CN/Y2023/V37/I24/22100098
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