高掺量废胎胶粉改性沥青性能研究

doi:10.11896/cldb.21120239

材料导报

2022, Vol. 36

Issue (16): 21120239-8 https://doi.org/10.11896/cldb.21120239

低碳生态路面材料

高掺量废胎胶粉改性沥青性能研究

徐光霁¹, 范剑伟¹, 马涛^1,*, 朱雅婧¹, 李树仁²

1 东南大学交通学院,南京 211189
2 安徽省公路桥梁工程有限公司,合肥 230031

Study on Performances of Asphalt Modified by High Content Waste Tire Rubber Powder

XU Guangji¹, FAN Jianwei¹, MA Tao^1,*, ZHU Yajing¹, LI Shuren²

1 School of Transportation, Southeast University, Nanjing 211189, China
2 Anhui Highway and Bridge Engineering, Co., Ltd., Hefei 230031, China

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摘要将废旧轮胎制成废胎胶粉用于制备橡胶沥青,可实现废旧轮胎的在路面中的资源化利用。本工作制备了不同芳烃油掺量、反应温度和反应时间下的高掺量废胎胶粉改性橡胶沥青试样,设计溶解度试验并结合扫描电镜(SEM)试验,研究了胶粉与沥青反应程度和所制备橡胶沥青存储稳定性的相关性。进一步测试了橡胶沥青的三大指标、弹性恢复、高温粘度指标在反应过程中的变化趋势,并与基质沥青、苯乙烯-丁二烯嵌段共聚物(SBS)改性沥青和不含芳烃油的中高掺量橡胶沥青对比,从而确定以芳烃油为助剂的高掺量橡胶沥青的制备参数。结果表明,添加芳烃油可有效提高35%(质量分数,下同)橡胶沥青的存储稳定性,保障施工和易性。相比于软化点差,车辙因子比更适合用于评价高掺量橡胶沥青的存储稳定性。所制备高掺量橡胶沥青的溶解度与其存储稳定性有明显的相关性。芳烃油的加入对35%橡胶沥青的高低温性能有不利影响,但当芳烃油掺量控制在5%~7.5%时,其高低温性能仍接近SBS改性沥青。高掺量废胎胶粉改性橡胶沥青的制备参数可确定为:剪切转速为800 r/min,废轮胎胶粉和芳烃油掺量分别为橡胶沥青总质量的35%和5%~7.5%,反应温度为230 ℃,反应时间为225 min。

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关键词: 芳烃油高掺量废胎胶粉制备参数橡胶沥青

Abstract: The waste tire rubber powder made from waste tires can be used to prepare rubber asphalt, which can realize the resource utilization of waste tires in pavement. In this work, asphalt samples modified by waste tire rubber powder with different aromatic oil contents, reaction temperatures and reaction times were prepared. The solubility test was designed and combined with scanning electron microscope (SEM) test to study the correlation between the reaction degree of rubber powder and the storage stability. The change trends of penetration, ductility, softening point, elastic recovery and high temperature viscosity indexes of rubber asphalt in the reaction process were tested, and the index values were compared with those of matrix asphalt, SBS modified asphalt and medium/high content rubber asphalt without aromatic oil, so as to determine the preparation parameters of high content rubber asphalt with aromatic oil. The results show that adding aromatic oil effectively improves the storage stability of 35% rubber asphalt and ensures its workability of construction. Rutting factor ratio is more suitable to evaluate the storage stability of high content rubber asphalt than softening point difference index. The solubility of high content rubber asphalt has an obvious correlation with its storage stability. The addition of aromatic oil has an adverse effect on high and low temperature performances of 35% rubber asphalt, but when the content of aromatic oil is within 5%—7.5%, its high and low temperature performance is still close to SBS modified asphalt. The preparation parameters of high content waste tire rubber asphalt can be determined as follows: the shear speed is 800 r/min, the content of waste tire rubber powder and aromatic oil is 35% and 5%—7.5% of the total mass of rubber asphalt respectively, the reaction temperature is 230 ℃, and the reaction time is 225 min.

Key words: aromatic oil high content waste tire rubber powder preparation parameters rubber asphalt

出版日期: 2022-08-25 发布日期: 2022-08-29

ZTFLH:

U414

基金资助: 国家自然科学基金(51808116);东南大学优秀青年教师科学研究资助项目(2242021R41132)

通讯作者: ^*matao@seu.edu.cn

作者简介: 徐光霁,东南大学交通学院副教授、硕士研究生导师。2009年和2012年于武汉理工大学分别获得工学学士学位和硕士学位,2017年5月于美国罗格斯大学获得博士学位。主要研究领域为道路材料多尺度分析与表征、沥青路面养护新材料及技术、道路绿色再生技术、道路材料模型与数值计算。近五年来公开发表学术论文18篇。马涛,东南大学交通学院教授、博士研究生导师,国家优青,交通运输部中青年科技创新领军人才。2004年和2010年于东南大学交通学院分别获得学士和博士学位。目前主要从事道路数字化建模与多尺度仿真、功能性路面材料与智能化道路、路面结构智能感知与无损检测、沥青路面智慧运维与绿色管养、沥青路面智能化施工管控技术等研究。发表SCI/EI学术论文100余篇,入选2020中国高被引学者,授权国家发明专利40余项。

引用本文:

徐光霁, 范剑伟, 马涛, 朱雅婧, 李树仁. 高掺量废胎胶粉改性沥青性能研究[J]. 材料导报, 2022, 36(16): 21120239-8.
XU Guangji, FAN Jianwei, MA Tao, ZHU Yajing, LI Shuren. Study on Performances of Asphalt Modified by High Content Waste Tire Rubber Powder. Materials Reports, 2022, 36(16): 21120239-8.

链接本文:

http://www.mater-rep.com/CN/10.11896/cldb.21120239 或 http://www.mater-rep.com/CN/Y2022/V36/I16/21120239

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