Dmytro MansuraContribution of Pavement Texture Factors on Fuel Consumption | |||||||
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ISBN: | 978-3-8440-6186-4 | ||||||
Series: | Schriftenreihe des Fachzentrums Verkehr Herausgeber: Prof. Dr.-Ing. Felix Huber Wuppertal | ||||||
Volume: | 16 | ||||||
Keywords: | pavement surface; micro-distortional rolling resistance; numerical model; experiments | ||||||
Type of publication: | Thesis | ||||||
Language: | English | ||||||
Pages: | 260 pages | ||||||
Figures: | 176 figures | ||||||
Weight: | 387 g | ||||||
Format: | 21 x 14,8 cm | ||||||
Bindung: | Paperback | ||||||
Price: | 49,80 € / 62,30 SFr | ||||||
Published: | September 2018 | ||||||
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Abstract: | Rolling resistance (RR) is a comprehensive term that embraces three major energy dissipation mechanisms (tyre macro-distortion, tyre micro-distortion and pavement macro-distortion), all of which cause more compression in a leading end than in a trailing end of a contact patch. This accounts for an average of 119 MJ/liters of fuel per car yearly. A slight rearrangement in surface texture may therefore decrease fuel consumption bringing substantial long-term socio-economic benefits, which would help in meeting EU limits on CO2 (95 g/km until 2021) fostering sustainable construction of pavements. This study describes a newly developed multi-scale 3-D numerical model and two in-laboratory and one in-situ experimental tests to calculate micro-distortional RR due to indentation of aggregates into visco-elastic tread compound. Two computational and two experimental approaches to quantify micro-distortional RR were developed. The contact forces appeared of a reasonable distribution and magnitude. It was found that micro-distortional RR is higher on a rougher/sparsely packed surface compared to a smoother/tightly packed case; longitudinally grooved concrete was the most energy efficient texture studied. The predictions were confirmed qualitatively using the experiments developed. A numerical solution and experimental techniques can be implemented into Life-Cycle Analysis, allowing a texture-related fuel consumption assessment during the service life stage. The findings confirm that stone-based RR can be substantial in magnitude, but conclusions on low/optimal/sustainable RR texture packing can only be made if friction/drainage/noise and rubber properties are considered together. |