Thermal segregation of asphalt material in road repair

Byzyka, J; Rahman, M; Chamberlain, DA

Abstract

This paper presents results from a field study of asphaltic pavement patching operations performed by three different contractors working in a total of ten sites. It forms part of an ongoing research programme towards improving the performance of pothole repairs. Thermal imaging technology was used to record temperatures of the patching material throughout the entire exercise, from the stage of material collection, through transportation to repair site, patch forming, and compaction. Practical complications occurring during patch repairs were also identified. It was found that depending on the weather conditions, duration of the travel and poor insulation of the transported hot asphalt mix, its temperature can drop as high as 116.6 oC over the period that the reinstatement team travel to the site and prepare the patch. This impacting is on the durability and performance of the executed repairs. Cold spots on the asphalt mat and temperature differentials between the new hot-fill asphalt mix and existing pavement were also identified as poorly compacted areas that were prone to premature failure. For example, over the five-minute period, the temperature at one point reduced by 33% whereas the temperatures of nearby areas decreased by 65% and 71%. A return visit to the repair sites, three months later, revealed that locations where thermal segregation was noted, during the patching operation, had failed prematurely.

Citation

Byzyka, J., Rahman, M., & Chamberlain, D. (2017). Thermal segregation of asphalt material in road repair. Journal of Traffic and Transportation Engineering, 4(4), 360-371. https://doi.org/10.1016/j.jtte.2017.05.008

• Journal Article Type: Article
• Acceptance Date: May 4, 2017
• Online Publication Date: Jul 14, 2017
• Publication Date: Aug 1, 2017
• Deposit Date: Aug 19, 2019
• Publicly Available Date: Aug 19, 2019
• Journal: Journal of Traffic and Transportation Engineering (English Edition)
• Print ISSN: 2095-7564
• Publisher: Elsevier
• Volume: 4
• Issue: 4
• Pages: 360-371
• DOI: https://doi.org/10.1016/j.jtte.2017.05.008
• Publisher URL: https://doi.org/10.1016/j.jtte.2017.05.008
• Related Public URLs: https://www.sciencedirect.com/journal/journal-of-traffic-and-transportation-engineering-english-edition
• Additional Information: Funders : International Chem-Crete Corporation, Texas, USA