Sustainability of the Optimum Pavement Model of Reclaimed Asphalt from a Used Pavement Structure

Edis Softić, Veljko Radičević, Marko Subotić, Željko Stević, Zlatan Talić and Dragan Pamučar
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Edis Softić: Faculty of Technical Sciences, University of Bihać, dr Irfana Ljubijankica bb, 77000 Bihać, Bosnia and Herzegovina
Veljko Radičević: Technical College of Applied Sciences, Uroševac (Leposavić), 24. Novembar bb, 38218 Leposavić, Serbia
Marko Subotić: Faculty of Transport and Traffic Engineering Doboj, University of East Sarajevo, Vojvode Mišića 52, 74000 Doboj, Bosnia and Herzegovina
Željko Stević: Faculty of Transport and Traffic Engineering Doboj, University of East Sarajevo, Vojvode Mišića 52, 74000 Doboj, Bosnia and Herzegovina
Zlatan Talić: Faculty of Polytechnic, University of Zenica, Fakultetska 1, 72000 Zenica, Bosnia and Herzegovina
Dragan Pamučar: Military Academy, Department of Logistics, University of Defence, Pavla Jurisica Sturma 33, 11000 Belgrade, Serbia

Sustainability, 2020, vol. 12, issue 5, 1-21

Abstract: This paper demonstrates and provides additional findings and instructions to produce new cold-recycled layers of pavement structures spatially and temporally sustainable. At the same time, recycled pavement structures have been enhanced with optimum amounts of new stone materials and binders made of cement and foamed bitumen. The subject of the research is based on the examination of recycled asphalt from surface and bituminous base courses of pavement structures for use on higher-type roads. The aim of the research is to model the process of producing recycled asphalt by cold recycling to optimize the process of influential parameters. In addition, one of the primary goals of the research is to demonstrate a sustainable way of producing new cold-recycled layers of pavement structures. The obtained results indicated the inevitability of the use of recycled material from pavement structures with the possibility of applying secondary and tertiary crushing of recycled mass, which depends on the type of layer for which the recycled material would be used. The research resulted in an optimum mixture variant of the stabilization layer of pavement structure that consists mainly of recycled material from a worn pavement structure improved with a relatively small amount of new aggregate with the addition of minimal stabilizers made of cement and foamed bitumen. The results showed that the optimum mixture variant of the stabilization layer is spatially and temporally stable. Additionally, the presented optimum variant of the stabilization layer enables sustainable development of road networks with minimum consumption of new natural resources.

Keywords: cold recycling; indirect tensile strength; sustainable binder materials (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2020
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Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:12:y:2020:i:5:p:1912-:d:327759

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