Towards an optimised lab procedure for long-term oxidative ageing of asphalt mix specimen
| Autor: | Bernhard Hofko, Josef Füssl, Hinrich Grothe, Daniel Steiner, Lukas Eberhardsteiner, Markus Hospodka, Florian Handle, Ronald Blab |
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| Rok vydání: | 2015 |
| Předmět: |
050210 logistics & transportation
Materials science Fatigue cracking 05 social sciences Metallurgy 0211 other engineering and technologies 02 engineering and technology Durability Mix design Brittleness Asphalt pavement Mechanics of Materials Ageing Asphalt 021105 building & construction 0502 economics and business Dynamic modulus Composite material Civil and Structural Engineering |
| Zdroj: | International Journal of Pavement Engineering. 17:471-477 |
| ISSN: | 1477-268X 1029-8436 |
| Popis: | Ageing of bitumen leads to increased stiffness and brittleness. Thus, bituminous bound pavements become more prone to failure by low-temperature and fatigue cracking. Therefore, the ageing behaviour of bitumen has a crucial impact on durability, as well as recyclability of pavements. To assess ageing of bitumen, the rolling thin film oven test and pressure ageing vessel are standardised methods for short-term and long-term ageing in the lab. For lab-ageing of hot mix asphalt (HMA), various methods have been developed in the last decades. This paper presents a study on the potential of employing a highly oxidant gas for simulating the long-term oxidative ageing of asphalt mix specimens in the lab. Based on the results, an optimised lab-ageing procedure (Viennese Ageing Procedure – VAPro) for compacted HMA specimens to assess mix performance of long-term lab-aged specimens is developed. Thus, it is possible to optimise mix design not only for short-term performance but to take into account effects of oxidat... |
| Databáze: | OpenAIRE |
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