Pyrolysis of Reclaimed Asphalt Aggregates in Mortar

Pyrolysis of Reclaimed Asphalt Aggregates in Mortar

Setiadji, Bagus Hario (Universitas Diponegoro)
Wibowo, M. Agung (Universitas Diponegoro)
Jonkers, H.M. (TU Delft Materials and Environment)
Ottele, M. (TU Delft Materials and Environment)
Qomaruddin, Mochammad (Universitas Diponegoro; Universitas Nahdlatul Ulama Surabaya)
Sugianto, Felix Hariyanto (Universitas Diponegoro)
Lie, Han Ay (Universitas Diponegoro)

2022

Asphalt pavement consists of aggregates resulting in a waste material at end of its life. The aggregates can be reused as basic material for asphalt or cementitious binding agents. In both scenarios, the recycled aggregates should provide a good bond with the binder to achieve strength. This study focuses on reusing recycled asphalt aggregates (RAA) in mortar. The major weakness of RAA is the thin oily film originating from the asphalt residue, weakening the bond with cement. The pyrolysis method is accessed in an attempt to overcome this weakness. Three scenarios were investigated; the use of virgin aggregates (VA), RAA, and pyrolysis recycled asphalt aggregate (PRAA) as constituent in mortar. All variables were set a constant except for the aggregate type, the VA mortar function as controlling element. This research is methodologically based on experimental data conducted in the laboratory, while aggregate samples were taken from the field. To analyze the influence of pyrolysis to the aggregate-to-cement bond behaviour, qualitative and quantitative data were collected. The quantitative data were the mechanical properties, the mortar tensile, and compression strength. The qualitative data were obtained from scanning electron microscope readings to visually observe the aggregate surface roughness and voids, including the aggregates cross-section and pre-existing micro-cracks in the aggregate-to-cement interface. Supporting data were the aggregates‘ abrasion rate and absorption. The RAA resulted in a significant mortar strength decrease. This conclusion was supported by the findings of pre-existing cracks in the interfacial transition zone. The pyrolysis method improved the compression strength but negligibly affected the tensile behavior. The compression and tensile strength increased as a function of time for both RAA and PRAA, and a strength convergence was reached at 28 days. The PRAA is considered an option for reuse in mortar, supporting nature conservation.

Mechanical properties
Mortar constituent
Pyrolysis recycled asphalt aggregates

http://resolver.tudelft.nl/uuid:a9d1b41c-626b-4e64-bcab-41627a2f82e1

https://doi.org/10.14716/ijtech.v13i4.5621

2023-07-01

2086-9614

International Journal of Arts and Technology, 13 (4), 751-763

Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Institutional Repository

journal article

© 2022 Bagus Hario Setiadji, M. Agung Wibowo, H.M. Jonkers, M. Ottele, Widayat, Mochammad Qomaruddin, Felix Hariyanto Sugianto, Purwanto, Han Ay Lie