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Warm Mix Asphalt / Low temperature asphalt 2 Assessing bitumen additives for temperature reduction of asphalt mixtures
| Content Provider | Semantic Scholar |
|---|---|
| Author | Sol-Sánchez, Miguel Moreno-Navarro, Fernando Rubio-Gámez, Mª Carmen Jiménez, Marianela Perea, Eugenio Albornoz, Fernando |
| Copyright Year | 2020 |
| Abstract | Hot bitumen is perfectly suited to coat mineral aggregates and the performance of asphalt is directly linked to the complete coating of the aggregate. There is, however, a push for lower bitumen temperatures – which could have a negative effect in that process for environmental reasons. Lower temperatures during manufacturing and laying of the asphalt mixture mean less energy consumption, and less emissions. For that purpose, various bitumen additives are offered, like waxes which melt above the melting point temperature generating a much lower viscosity of the bitumen, below the melting point leading to an additional structure and stiffness or surface-active agents. These increase the polarity of the bitumen and thereby ease the coating process of polar aggregates. To assess the effectiveness of such agents in the laboratory, a quick and easy test method, based on a viscosity measurement was developed. The test involves a Dynamic Shear Rheometer which is equipped with a stirrer. A reference bitumen, blended with filler, is tested at different temperatures. Exchanging the bitumen with modified versions and varying the temperature results in a ranking of the effectiveness of temperature reducing additives. Lowering viscosity generally corresponds to an easier coating process and better workability of asphalt mixtures. The method should allow the further development of temperature reduction technologies. Warm Mix Asphalt / Low temperature asphalt |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www.eecongress2020.org/wp-content/uploads/2020/02/warm-mix-asphalt-low-temperature-asphalt_abstracts.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
