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

Byzyka, J ORCID: https://orcid.org/0000-0002-5570-8909, Rahman, M and Chamberlain, D A 2018, 'An innovative asphalt patch repair pre–heating method using dynamic heating' , Construction and Building Materials, 188 , pp. 178-197.

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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.

Item Type: Article
Schools: Schools > School of Computing, Science and Engineering
Journal or Publication Title: Construction and Building Materials
Publisher: Elsevier
ISSN: 0950-0618
Related URLs:
Funders: Chem- Crete Corporation, Texas, USA, Engineering and Physical Sciences Research Council (EPSRC), Epicuro Ltd, DAC Consulting (UK) Ltd.
Depositing User: Dr J Byzyka
Date Deposited: 19 Aug 2019 10:20
Last Modified: 05 Sep 2019 13:15
URI: http://usir.salford.ac.uk/id/eprint/50799

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