Recyclability of epoxy-modified open-graded porous asphalt

Conference paper (2023)

Authors

R. Jing Pavement Engineering - CEG
P. Apostolidis Pavement Engineering - CEG
X. Liu Pavement Engineering - CEG
Robbert Naus Dura Vermeer
S. Erkens Pavement Engineering - CEG
Athanasios Scarpas Khalifa University, Pavement Engineering - CEG
Research Group
Pavement Engineering (CEG) (TU Delft)
Copyright: © 2023 R. Jing, P. Apostolidis, X. Liu, R. Naus, S. Erkens, Athanasios Scarpas
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Published Date

2023

Language

English

Reuse Rights

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Faculty

Civil Engineering & Geosciences

Department

Engineering Structures

Research Group

Pavement Engineering

Abstract

Epoxy asphalt attracted the attention of road authorities in many countries as a solution for du-rable open-graded porous asphalt (OGPA) surface layers with enhanced longevity. Nevertheless, the recycla-bility of aged epoxy asphalt materials has not been thoroughly studied yet. This research presents an experi-mental program conducted in the laboratory to assess the potential recyclability of epoxy-modified open-graded porous asphalt (EMOGPA) mixes. Results indicate that the aging increased the tensile strength of studied mixes, with the strength and strength development rate of aging EMOGPA mixes to be almost identi-cal to standard OGPA mixes. The EMOGPA mixes have shown higher resistance against water damage than the OGPA mixes supporting the claim that the stone-mastic adhesion is improved with the use of epoxy bind-er. It was also proven that the aged material containing the epoxy binder could be re-melted to produce new pavement materials. The new EMOGPA mixes with the recycled epoxy material exhibited similar durability characteristics with the recycled standard OGPA mixes.