An innovative asphalt patch repair pre–heating method using dynamic heating

Byzyka, J; Rahman, M; Chamberlain, D A

Abstract

In hot mix asphalt patch repair, inadequate temperature at the interfaces is one of the influencing factors for inferior compaction and poor interface bonding. To enhance repair performance, a precisely controlled infrared pre-heating method for patch repair has been investigated. Asphalt slabs with 45 mm, 75 mm and 100 mm deep pothole excavations were subjected to dynamic heating with infrared heater operating power from 6.6 kW to 7.7 kW. The heater was kept either stationary or moving slowly across the excavations at 130 mm and 230 mm offsets. The tests included evaluating temperature increase throughout the excavations and inside the slab, recording heat power of infrared heater and heating time to avoid burning the asphalt. Irrespective of excavation depth, heating power and offset, the temperature distribution was found non uniform in the pothole excavations and into the asphalt slab. The temperatures were higher at the faces of the excavation than inside the slab. Dynamic heating for approximately 10 min yielded better heat distribution while minimising the possibility of asphalt overheating and long pre-heating time. It has been concluded that 45 mm and 100 mm deep pothole excavations can be preheated with 6.6 kW and stationary heater or 7.5 kW and moving heater at 230 mm and 130 mm offset respectively. 75 mm deep excavation can be pre-heated with 7.1 kW and stationary heater at 230 mm offset.

Citation

Byzyka, J., Rahman, M., & Chamberlain, D. A. (2018). An innovative asphalt patch repair pre–heating method using dynamic heating. Construction and Building Materials, 188, 178-197. https://doi.org/10.1016/j.conbuildmat.2018.08.086

• Journal Article Type: Article
• Acceptance Date: Aug 15, 2018
• Online Publication Date: Aug 23, 2018
• Publication Date: Nov 10, 2018
• Deposit Date: Aug 19, 2019
• Publicly Available Date: Aug 19, 2019
• Journal: Construction and Building Materials
• Print ISSN: 0950-0618
• Publisher: Elsevier
• Volume: 188
• Pages: 178-197
• DOI: https://doi.org/10.1016/j.conbuildmat.2018.08.086
• Publisher URL: https://doi.org/10.1016/j.conbuildmat.2018.08.086
• Related Public URLs: https://www.sciencedirect.com/journal/construction-and-building-materials
• Additional Information: Funders : Chem- Crete Corporation, Texas, USA;Engineering and Physical Sciences Research Council (EPSRC);Epicuro Ltd;DAC Consulting (UK) Ltd.