• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>6th International RILEM Symposium on Performance Testing and Evaluation of Bituminous Materials, (PTEBM'03) Pt.1 Apr 14-16, 2003 Zurich, Switzerland >DEVELOPMENT OF A NEW METHODOLOGY FOR CHARACTERIZATION OF POLYMER MODIFIED BITUMENS AGEING BY INFRARED MICROSPECTROMETRY IMAGING
【24h】

DEVELOPMENT OF A NEW METHODOLOGY FOR CHARACTERIZATION OF POLYMER MODIFIED BITUMENS AGEING BY INFRARED MICROSPECTROMETRY IMAGING

机译：红外显微成像表征聚合物改性沥青老化的新方法开发

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Increase in traffic volume has led to wider use of Polymer modified Bitumens (PmBs) in "road construction. Although the mechanical properties of such materials have been widely studied, their change with time in service, also called ageing, is yet to be fully understood. One of the most important issues is to identify the process involved : is PmB's ageing a consequence of bitumen ageing, polymer ageing or both at the same time? Additionally, most PmBs feature a two-phase structure made of polymer rich areas along with polymer poor regions, depending on the bitumen chemistry, the polymer nature and content It is therefore important to take this into consideration when trying to sort out the respective effect on ageing of the polymer and the bitumen. FTIR microscopy is a suitable technique to analyse chemically and punctually in situ micro-phases of a material. By means of a motorized x-y sample stage and an appropriate software, the micro-morphology of a PmB can be studied by mapping functional group on a large area of a sample. This paper presents the results of a study of the ageing of different PmBs containing either saturated plastomers or unsaturated elastomers. Firstly, PmB's ageing throughout its whole service life could be simulated by applying conventional ageing tests, RTFOT, for the mixing process and laying of asphalt concrete, and PAV for in service ageing. Changes in the bitumen properties before and after ageing were thus recorded. Secondly, an ageing cell specially designed to fit the FTIR. microscope was developed to study directly and continually the PmB's oxidation by FTIR microscopy imaging. The results obtained by following simultaneously both phases evolution, allow to propose a method to measure changes in PmB's chemical composition. These changes are both bitumen and polymer dependent. Finally, the kinetics study shows that RTFOT and PAV can be simulated in the ageing cell in a quicker way. In conclusion, the design of an ageing cell associated to the FTIR microscope appears to be a very effective tool to observe and chemically study the microstructure of PmBs during ageing. It also gives some insights to evaluate PmB's durability.
机译：交通量的增加已导致在公路建设中更广泛地使用聚合物改性沥青（Pm​​B）。尽管已广泛研究了此类材料的机械性能，但它们随使用时间的变化（也称为老化）尚未得到充分理解。 。最重要的问题之一是确定涉及的过程：PmB的老化是沥青老化，聚合物老化还是两者同时发生的结果？此外，大多数PmB具有由聚合物富集区域和聚合物组成的两相结构较差的区域，取决于沥青的化学性质，聚合物的性质和含量，因此在尝试理清对聚合物和沥青老化的相应影响时，必须考虑到这一点，FTIR显微镜是一种适用于化学和化学分析的技术。通过自动的xy样品台和适当的软件，可以通过映射f来研究PmB的微观形态。大面积样本上的功能性组。本文介绍了包含饱和塑性体或不饱和弹性体的不同PmB的老化研究结果。首先，可以通过应用常规老化测试，RTFOT（用于沥青混凝土的混合过程和铺设）和PAV（用于服务老化）来模拟PmB整个使用寿命的老化。因此记录了老化前后沥青性质的变化。其次，专门设计用于FTIR的老化电池。显微镜的发展是通过FTIR显微镜成像直接和连续地研究PmB的氧化。通过同时跟踪两个阶段的演化而获得的结果，允许提出一种测量PmB化学成分变化的方法。这些变化均取决于沥青和聚合物。最后，动力学研究表明，可以在老化细胞中更快地模拟RTFOT和PAV。总之，与FTIR显微镜相关的衰老细胞的设计似乎是观察和化学研究衰老过程中PmBs微观结构的非常有效的工具。它还为评估PmB的耐用性提供了一些见识。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号