Postcarbone road - The endless cycle of asphalt reuse

后碳路——沥青再利用的无限循环

• 批准号: 392670763
• 负责人: Professor Dr.-Ing. Martin Radenberg
• 金额: --
• 依托单位: Lehrstuhl für Verkehrswegebau
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/392670763?language=en
• 关键词: Postcarbone; road; endless; cycle; asphalt

In all areas of our modern society, crucial ambitions are the efficient use of our resources and optimal sustainability. In road construction, the reuse of asphalt can significantly contribute to achieving these goals, as large quantities of reclaimed asphalt are obtained in Germany. These reclaimed asphalts have already been reused for decades and in increasingly large quantities so that some asphalts are already facing a higher reuse cycle today. Therefore, this project aims to investigate and evaluate the approach of a multiple or endless reuse cycle of asphalt. For this purpose, a collaboration between the specialised partners Ruhr-Universität Bochum, Technische Universität Berlin and Federal Institute for Materials Research and Testing is foreseen so that the consortium can demonstrate comprehensive experience in the characterisation of the chemical and physical properties as well as the ageing and rejuvenation behaviour of bituminous binders and asphalt. The proposed project is primarily based on the predecessor project Post carbon road – the endless cycle of bitumen reuse, which focused on the effects and mechanisms of different rejuvenators on the binder level. According to this previous project, multiple reuse of bitumen is generally possible using bio-based rejuvenators. But after the fourth cycle at the latest, a critical state is achieved making further reuse impossible. These identified limitations shall be eliminated or rather shifted in the proposed project. For this, a modified rejuvenator will be developed for a selected and known bitumen. The effect of this rejuvenator due to multiple ageing and rejuvenation will then be investigated at the binder level (unmodified and modified bitumen) as well as at the mastic and asphalt level. Furthermore, at the asphalt level, the influence of multiple ageing and rejuvenation on the adhesion behaviour as well as the diffusion of the rejuvenator in the aged binder will be investigated in more detail. For the evaluation of the diffusion, the development of two new method based on infrared spectroscopy is planned. For a simplified design of asphalt mixtures with multiple reused reclaimed asphalts, prediction models for different asphalt parameters based on binder or rather mastic parameters will be determined. In general, the results of this proposed project will show a principal approach whether and how a multiple or endless reuse of asphalt can be implemented being relevant for almost all players of the road construction sector.

在我们现代社会的所有领域，最重要的目标是有效利用我们的资源和最佳的可持续性。在道路建设中，沥青的再利用可以大大有助于实现这些目标，因为德国获得了大量的再生沥青。这些回收的沥青已经被重复使用了几十年，而且数量越来越大，所以今天一些沥青已经面临着更高的重复使用周期。因此，本项目旨在研究和评价沥青多次或无限循环再利用的方法。为此，预计将与专业合作伙伴Ruhr-Universität波鸿、Universität柏林技术公司和联邦材料研究与测试研究所进行合作，以便该联盟能够在沥青粘合剂和沥青的化学和物理特性以及老化和再生行为方面展示全面的经验。本项目主要基于之前的项目“后碳之路——沥青再利用的无限循环”，重点研究了不同再生剂对粘合剂水平的影响和机制。根据之前的项目，使用生物基再生剂通常可以多次重复使用沥青。但是在最迟的第四个周期之后，达到了一个使进一步重用变得不可能的临界状态。这些确定的限制应在拟议项目中消除或转移。为此，将针对选定的已知沥青开发一种改良的再生剂。然后，将在粘合剂水平（未改性沥青和改性沥青）以及胶泥和沥青水平上研究这种再生剂由于多次老化和再生而产生的影响。此外，在沥青水平上，将更详细地研究多次老化和返老还老对黏附行为的影响以及返老还老剂在老化粘合剂中的扩散。对于扩散的评价，计划发展两种基于红外光谱的新方法。为了简化再生沥青多次重复使用的沥青混合料的设计，需要确定不同沥青参数的预测模型，该模型是基于粘结剂参数的，而不是基于浆料参数的。总的来说，这个拟议项目的结果将显示一个主要方法，即沥青的多次或无限再利用是否以及如何实施，与道路建设部门的几乎所有参与者都相关。