Evolution of bubble size distribution during foam bitumen formation and decay
2014 (English)In: Asphalt Pavements: Proceedings of the International Conference on Asphalt Pavements, ISAP 2014 / [ed] Kim, YR, BOCA RATON: CRC PRESS-TAYLOR & FRANCIS GROUP , 2014, 1233-1240 p.Conference paper (Refereed)
The warm asphalt mixture process using foam asphalt technology allows mixing and compaction at lower temperature. Nevertheless the higher air void content and incomplete coating of large aggregates are issues that need improvement to reach the properties of hot mix asphalt. In order to improve the understanding and characterization of the bitumen foam, X-ray radiography was used to investigate the formation and decay of bitumen foam in 2D representation. Image segmentation analysis was used to determine the foam bubble size distribution as a function of time. The impact of water content on the process has been studied for two penetration grade bitumen. The water content showed considerable influence on the foam quality in terms of expansion ratio and bubble size distribution. Increasing the water content in the foaming process leads to a quicker collapse of the bubbles and favors coalescence of individual bubbles.
Place, publisher, year, edition, pages
BOCA RATON: CRC PRESS-TAYLOR & FRANCIS GROUP , 2014. 1233-1240 p.
, ASPHALT PAVEMENTS, VOLS 1 AND 2
Foamed bitumen, expansion ratio, half-life, X-ray radiography, image segmentation analysis
Construction Management Civil Engineering
IdentifiersURN: urn:nbn:se:kth:diva-160009ISI: 000347408100115ScopusID: 2-s2.0-84904130891ISBN: 978-1-315-73675-4ISBN: 978-1-138-02693-3ISBN: 978-113802713-8OAI: oai:DiVA.org:kth-160009DiVA: diva2:788671
12th International Conference on Asphalt Pavements, ISAP 2014; Raleigh, NC; United States; 1 June 2014 through 5 June 2014
QC 201502162015-02-162015-02-122016-03-03Bibliographically approved