华南理工大学学报(自然科学版) ›› 2007, Vol. 35 ›› Issue (7): 37-40,51.

• 化学化工 • 上一篇    下一篇

SBS 改性沥青的动态力学性能

陈华鑫 王秉纲   

  1. 长安大学 特殊地区公路工程教育部重点实验室,陕西 西安 710064
  • 收稿日期:2006-09-15 出版日期:2007-07-25 发布日期:2007-07-25
  • 通信作者: 陈华鑫(1973-),男,副教授,博士,主要从事沥青和沥青混合料材料性能及新材料改性技术研究. E-mail:chx@ gl. chd. edu. cn
  • 作者简介:陈华鑫(1973-),男,副教授,博士,主要从事沥青和沥青混合料材料性能及新材料改性技术研究.
  • 基金资助:

    西部交通建设科技项目(2001-318-000-38 )

Dynamic Mechanical Properties of SBS-Modified AsphaIt

Chen Hua-xin  Wang Bing-gang   

  1. Key Laboratory for Special Area Highway Engineering of the Ministry of Education , Chang' an Univ. , Xi'an, 710064, Shaanxi , China
  • Received:2006-09-15 Online:2007-07-25 Published:2007-07-25
  • Contact: 陈华鑫(1973-),男,副教授,博士,主要从事沥青和沥青混合料材料性能及新材料改性技术研究. E-mail:chx@ gl. chd. edu. cn
  • About author:陈华鑫(1973-),男,副教授,博士,主要从事沥青和沥青混合料材料性能及新材料改性技术研究.
  • Supported by:

    西部交通建设科技项目(2001-318-000-38 )

摘要: 通过1 种基质沥青、4 种苯乙烯-丁二烯-苯乙烯(SBS) 改性剂制备的13 种改性沥青的动态力学试验,分析比较了原样沥青和旋转薄膜烘箱试验(RTFOT)老化沥青的动态力学温度谱试验结果,讨论了SBS 改性沥青动态力学性能的变化机理,得出了改性剂的种类和剂量对其动态力学性能的影响.结果表明,低温下改性沥青的动态力学性能与基质沥青性能有关,高温时则取决于SBS 改性剂的性质, RTFOT 老化后因SBS 的裂化与降解使改性沥青的弹性成分产生损失,其性能向基质沥青特性转变.

关键词: SBS 改性沥青, 动态力学性能, RTFOT 老化, 温度谱, 机理

Abstract:

According to the tested results via dynamic shear rheometer for 13 types of SBS-modified asphalts composed of one base-asphalt and 4 styrene-butadiene-styrene (SBS) polymers , the temperature spectra of the original asphalt and the aged asphalt after the rolling thin-film oven test (RTFOT) were compared , and the variation mechanism of the dynamic mechanical properties for the modified asphalts was discussed. Furthermore , the effects of modifier type and dosage on the dynamic mechanical properties were investigated. The results show that the lowternperature dynamic mechanical properties of the modified asphalts depend on the property of the base asphalt , while the high-temperature properties rely on the property of SBS polymers , and that , during the RTFOT aging , there occurs the deterioration and degradation of SBS polymers , which may result in the loss of elastic components of the SBS-modified asphalts and the performance variation of the SBS-modified asphalt like the base asphalt.

Key words: SBS-modified asphalt, dynamic mechanical property, RTFOT aging, temperature spectrum, mechanism