中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊
重庆交通大学学报（自然科学版）

重庆交通大学学报（自然科学版） ›› 2021, Vol. 40 ›› Issue (04): 98-104.DOI: 10.3969/j.issn.1674-0696.2021.04.15

• 交通基础设施工程 • 上一篇    下一篇

生物柴油-塑料裂解蜡复合温拌改性沥青性能研究

凌天清1，魏巧2，李传强3，袁海2，杨清尘3   

  1. (1. 重庆交通大学 建筑与城市规划学院，重庆 400074； 2. 重庆交通大学 土木工程学院，重庆 400074； 3. 重庆交通大学 材料科学与工程学院，重庆 400074)
  • 收稿日期:2019-08-09 修回日期:2020-06-30 出版日期:2021-04-16 发布日期:2021-04-19
  • 作者简介:凌天清(1962—)，男，四川资阳人，教授，主要从事路面结构与材料开发技术方面的研究。E-mail:lingtq@163.com 通信作者：魏巧(1995—)，女，四川达州人，硕士研究生，主要从事路面新材料开发方面的研究。E-mail:359240564@qq.com
  • 基金资助:
    重庆交通大学研究生科研创新项目(2019S0144)；中国博士后面上项目(2015M572643XB)；重庆市科委基础科学与前沿技术研究项目(cstc2017jcyjAX0310)；重庆市教委科研项目(KJ1705124)；重庆市博士后科研项目特别资助项目(Xm2015075)

Properties of Biodiesel-Plastic Cracking Wax Composite Warm Mix Modified Asphalt

LING Tianqing1, WEI Qiao2, LI Chuanqiang3, YUAN Hai2, YANG Qingchen3   

  1. (1. School of Architecture and Urban Planning, Chongqing Jiaotong University, Chongqing 400074, China; 2. School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China; 3. School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, China)
  • Received:2019-08-09 Revised:2020-06-30 Online:2021-04-16 Published:2021-04-19
  • Supported by:
     

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摘要： 为降低热拌沥青混合料的能源燃烧和烟气污染，解决国内现有温拌剂成本较高的问题，自主研发了生物柴油-塑料裂解蜡（简称油-蜡）复合温拌改性剂。基于红外光谱（FTIR）和热重（TG）试验对油-蜡温拌剂的物化特性进行了表征。通过布氏旋转黏度（RV）试验、旋转薄膜烘箱（RTFO）试验、动态剪切流变（DSR）试验、低温弯曲梁流变（BBR）试验对5%、6%、7%掺量的油-蜡复合改性沥青的降黏效果、高低温性能及耐老化性能进行了评价，并与Sasobit改性沥青、Evotherm改性沥青进行了对比研究。基于表面自由能理论，采用接触角试验测试了油-蜡复合改性沥青、Sasobit改性沥青和Evotherm改性沥青的表面能参数，并分别计算3种温拌改性沥青与两种集料的黏附功。结果表明：油-蜡温拌剂对沥青的改性过程以物理作用为主，油-蜡温拌剂具有较好的热稳定性；掺入6%的油-蜡温拌剂后，改性沥青黏度较70#基质沥青降低约63%，其沥青混合料降温效果与3%Sasobit改性沥青混合料大致相同，拌和温度较热拌沥青混合料降低约30 ℃；油-蜡温拌剂能够改善沥青的耐老化能力和高温性能，但不利于沥青低温性能。综合分析，推荐油-蜡温拌剂掺量为6%。相比3%Sasobit改性沥青，6%油-蜡复合改性沥青的低温性能和黏附性较好，高温性能略差；相比0.6%Evotherm改性沥青，6%油-蜡复合改性沥青高温性能和黏附性较好，低温性能较差。

 

关键词: 道路工程, 温拌沥青, 油-蜡温拌剂, 物化性质, 路用性能

Abstract: In order to reduce the energy combustion and gas pollution of hot mix asphalt mixture and solve the problem of the high cost of warm mix agent in China, the biodiesel-plastic cracking wax (oil-wax for short) compound warm additive agent was independently developed. The physic-chemical characteristics of oil-wax warm mix agent were characterized by Fourier transform infrared spectroscopy (FTIR) and thermogravimetric test (TG).The viscosity reduction effect, high temperature performance, low temperature performance and anti-aging performance of oil-wax compound modified asphalt, whose content of oil-wax warm additive agent were 5%, 6%, 7% repetitively, were evaluated by rotational viscometer (RV) test, rotating thin film oven (RTFO) test, dynamic shear rheometer (DSR) test and bending beam rheometer test (BBR), and were compared with Sasobit modified asphalt and Evotherm modified asphalt. Based on the surface energy theory, the surface energy parameters of oil-wax compound modified asphalt, Sasobit modified asphalt and Evotherm modified asphalt were measured by contact angle test. The adhesion work of three kinds of warm mix modified asphalt and two kinds of aggregate was calculated respectively. The results show that the modification process of oil-wax warm mix agent for asphalt is mainly physical action, and oil-wax warm mix agent has better thermal stability. The viscosity of the oil-wax compound modified asphalt with 6% oil-wax warm additive agent is about 63% lower than that of 70# asphalt whose temperature reduction effect is similar to that of 3% Sasobit modified asphalt mixture. The mixing temperature of oil-wax modified asphalt mixture is about 30 ℃ lower than that of hot mix asphalt mixture. Oil-wax warm additive agent can improve the anti-aging performance and high temperature performance, but go against the low temperature performance. According to the comprehensive analysis, the recommended content of oil-wax warm additive agent is 6%. Compared with 3% Sasobit modified asphalt, 6% oil-wax modified asphalt has better low temperature performance and adhesion, while its high temperature performance is slightly worse. And 6% oil-wax modified asphalt has better high temperature performance and adhesion while its low-temperature performance is worse, compared with 0.6% Evotherm modified asphalt.

Key words: highway engineering, warm mix asphalt, oil-wax warm additive agent, physic-chemical property, pavement performance

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