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Warm mix asphalt (WMA) for rapid construction in airfield pavement

Rahman, Taqia; Dawson, Andrew; Thom, Nicholas

Authors

Taqia Rahman

Andrew Dawson

NICK THOM nicholas.thom@nottingham.ac.uk
Assistant Professor



Abstract

© 2020 Elsevier Ltd Warm-mix asphalt (WMA) is commonly mixed and compacted 15°C to 30°C below that of conventional hot mix asphalt (HMA). The lower production temperature of WMA is expected to give an advantage of a lower cooling time of newly laid asphalt overlay before it can be opened to traffic during the nighttime airfield pavement construction. The reduced cooling time of WMA would allow shorter airport closure time window and/or extend the time for the contractor for paving, and thus shorten the overall construction period due to more volume done each night. This is a beneficial practical advantage to hectic airports where the typical off-peak period is as short as 6–8 h. In this research, two different WMA technologies, Sasobit® and Rediset® (organic and chemical) were investigated through laboratory tests to see if there were notable differences in WMA rutting performance that could have considerable practical effects on the permissible temperature at the opening to traffic as compared to the HMA. Furthermore, a validated finite element (FE) solution for one-dimensional transient heat-transfer model is used to simulate the effect of the use of warm mix on shortening the cooling time and the overall project time. The laboratory test shows that the WMA with Sasobit has a significantly better rutting performance at the elevated temperature, enabling the WMA to be opened to traffic at a higher temperature, compared to HMA. The cooling analysis showed that, in comparison to HMA, the use of WMA could shorten the closure time of airport during the night time construction by 8–67 min (5–73% reductions), depending on the asphalt overlay thickness, specified traffic opening temperature and WMA production temperature. The use of WMA could also reduce the overall construction period by 2–16 nights for a single lift overlay, for the cases studied – which would represent a shortening of the overlay period by 4–24%.

Journal Article Type Article
Publication Date Jun 20, 2020
Journal Construction and Building Materials
Print ISSN 0950-0618
Electronic ISSN 1879-0526
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 246
Article Number 118411
APA6 Citation Rahman, T., Dawson, A., & Thom, N. (2020). Warm mix asphalt (WMA) for rapid construction in airfield pavement. Construction and Building Materials, 246, https://doi.org/10.1016/j.conbuildmat.2020.118411
DOI https://doi.org/10.1016/j.conbuildmat.2020.118411
Keywords Warm mix asphalt (WMA); Rapid construction; Rehabilitation; Airport pavements; Sasobit; General Materials Science; Civil and Structural Engineering; Building and Construction
Publisher URL https://www.sciencedirect.com/science/article/pii/S0950061820304165
Additional Information This article is maintained by: Elsevier; Article Title: Warm mix asphalt (WMA) for rapid construction in airfield pavement; Journal Title: Construction and Building Materials; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.conbuildmat.2020.118411; Content Type: article; Copyright: © 2020 Elsevier Ltd. All rights reserved.
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