SuPerPave® Mix Design Method of Recycled Asphalt Concrete Applied in the European Standards Context
| Autor: | Saverio Olita, Donato Ciampa |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
virgin binder
Rheometer Geography Planning and Development TJ807-830 Context (language use) Management Monitoring Policy and Law TD194-195 Mix design Renewable energy sources RAP binder Asphalt pavement GE1-350 mix design RAP (reclaimed asphalt pavement) Environmental effects of industries and plants Waste management Renewable Energy Sustainability and the Environment business.industry SuPerPave® RAM (reclaimed aggregate material) Environmental sciences Asphalt concrete Asphalt recycled asphalt Wearing course Dynamic shear rheometer Environmental science business |
| Zdroj: | Sustainability, Vol 13, Iss 9079, p 9079 (2021) Sustainability Volume 13 Issue 16 |
| ISSN: | 2071-1050 |
| DOI: | 10.3390/su13169079 |
| Popis: | The recycling of road and airport asphalt pavements requires greater reliability of mix design in order to ensure proper rehabilitation and effective reuse of recycled asphalt concrete. Currently, internationally, the most effective mix design procedures for recycled asphalt concrete with RAP (Reclaimed Asphalt Pavement) refer to guidelines developed by SuPerPave® Mixtures Expert Task Group. In this paper, according to the requirements of the European standard EN 13108, the authors investigated the reliability of the above mix design procedure. In particular, the SuPerPave® mix design guidelines were applied for dosing components of wearing course layer recycled asphalt mixture and for the determination of PG (Performance Grade) and critical temperatures of binder contained in RAP (RAP binder) and of binder added ex-novo (virgin binder). The experimental research program started from RAM (Reclaimed Aggregate Material) grading characterization and RAP binder content determination. Afterwards, rheological characterization of the RAP binder and selected virgin binder was carried out using the DSR (Dynamic Shear Rheometer) and BBR (Bending Beam Rheometer) devices. This step allowed us to identify the right virgin binder percentages to be added to RAP binder. Then, in compliance with European standards, the mix design study of recycled mixtures was carried out, identifying the necessary granulometric integrations and the virgin-binder-appropriate percentages to be added. In this phase, three different RAP percentages were used: 30%, 40%, and 50%. Finally, the experimental plan was completed with a preliminary mechanical characterization of the studied recycled asphalt mixtures. The results showed that the implemented rational mix design guarantees performance levels of wearing course layer recycled mixtures that are fully in compliance with European standards. |
| Databáze: | OpenAIRE |
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