Roads and Bridges - Drogi i Mosty
18, 4, 2019, 303-315

Impact of reclaimed asphalt pavement (RAP) on low-temperature properties of asphalt concrete

Mariusz Jaczewski Mail
Gdańsk University of Technology, Faculty of Civil and Environmental Engineering, 11/12 Narutowicz str., 80-233 Gdańsk
Bohdan Dołżycki Mail
Gdańsk University of Technology, Faculty of Civil and Environmental Engineering, 11/12 Narutowicz str., 80-233 Gdańsk
Jacek Alenowicz Mail
Gdańsk University of Technology, Faculty of Civil and Environmental Engineering, 11/12 Narutowicz str., 80-233 Gdańsk
Piotr Jaskuła Mail
Gdańsk University of Technology, Faculty of Civil and Environmental Engineering, 11/12 Narutowicz str., 80-233 Gdańsk
Published: 2019-12-31

Abstract

Hot mix recycling is a practice which enables reusing materials from old asphalt pavements. Current Polish regulations allow usage of RAP only for binder and base courses, and its amount is limited. Asphalt mixtures with RAP material have to fulfil requirements stated for typical asphalt mixtures. The research presents low-temperature properties of twelve different asphalt concretes with RAP material, determined using three-point bending test. Mixtures differed in: type (for wearing, binder or base courses), content of RAP (from 0% up to 60%), quality of RAP material and application of rejuvenator. For all mixtures, RAP content strongly influences mechanical properties – critical strain and flexural strength. Their values decreased with an increase in the used amount of RAP. The greatest decrease was observed for wearing and binder courses. The changes were much smaller for base course mixtures, even with higher amounts of RAP.

Keywords


bending test, flexural strength, hot mix recycling, low-temperature properties, RAP.

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References


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Impact of reclaimed asphalt pavement (RAP) on low-temperature properties of asphalt concrete

  
Jaczewski, Mariusz et al. Impact of reclaimed asphalt pavement (RAP) on low-temperature properties of asphalt concrete. Roads and Bridges - Drogi i Mosty, [S.l.], v. 18, n. 4, p. 303-315, dec. 2019. ISSN 2449-769X. Available at: <>. Date accessed: 04 Jul. 2020. doi:http://dx.doi.org/10.7409/rabdim.019.020.