Modelling rheological characteristics of rejuvenated aged bitumen

Ržek, Lidija; Tušar, Marjan; Perše, Lidija Slemenik

doi:10.1080/10298436.2020.1799205

Cited by 9 publications

(2 citation statements)

References 19 publications

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“…On the other hand, various types of oil additives have also been found to improve asphalt binder performance, particularly at intermediate and low temperatures. Some commonly used oil additives include waste cooking oil, waste engine oil, soybean oil, and pyrolytic oils generated from wood chips, crop straw, sawdust, and waste tire [11][12][13][14][15][16][17]. Plastic waste generation has expanded in tandem with rising plastic use to the point where it is now a major worldwide problem in terms of its detrimental impact on the environment, human health, and the economy.…”

Section: Introductionmentioning

confidence: 99%

Storage stability performance of composite modified asphalt with scrap non-tire automotive rubber, waste plastic pyrolytic oil and sulfur

2023

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Composite asphalt binder has emerged as a potential solution for improving asphalt functionality at a wide spectrum of temperatures. Storage stability of modified binder remains a main concern to ensure homogeneity during various stages including its storage, pumping, transportation, and construction. The aim of this study was to assess the storage stability of composite asphalt binders fabricated using non-tire waste ethylene-propylene-diene-monomer (EPDM) rubber and waste plastic pyrolytic oil (PPO). The influence of addition of a crosslinking additive (sulfur) was also investigated. Two different approaches were employed in the fabrication of composite rubberized binders: (1) sequential introduction of PPO and rubber granules, and (2) inclusion of rubber granules pre-swelled with PPO at 90°C to the conventional binder. Based on the modified binder fabrication approaches and the addition of sulfur, four categories of modified binders were prepared, namely sequential (SA), sequential with sulfur (SA-S), pre-swelled (PA), and pre-swelled with sulfur (PA-S). For variable modifier dosages (EPDM:16%, PPO: 2, 4, 6, and 8%, and sulfur: 0.3%), a total of 17 combinations of rubberized asphalt were subjected to two durations of thermal storage (48 and 96 hours) and then characterized for their storage stability performance through various separation indices (SIs) based on conventional, chemical, microstructural, and rheological analyses. The optimal storage stability performance was achieved at a PPO dosage of 6% under the four candidate approaches. It was also observed that the SIs based on chemical analysis and rubber extraction test had a good correlation with rheology-based SIs compared to the conventionally used softening point difference. A composite modified binder with PPO and EPDM rubber having adequate storage stability is a promising step in the use of sustainable composite-modified binders in asphalt pavement construction.

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Section: Introductionmentioning

confidence: 99%

Storage stability performance of composite modified asphalt with scrap non-tire automotive rubber, waste plastic pyrolytic oil and sulfur

2023

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“…Subsequently, bitumen becomes harder and more brittle, its viscosity increases, adhesion and cohesion deteriorate, which leads to the ravelling and the formation of cracks in asphalt mixture [1][2][3]. With the use of special additives, the so-called rejuvenator, bitumen restores its basic properties [4,5]. Furthermore, rejuvenators allow mixing and installation at lower temperatures, which reduces production costs and energy consumption, therefore the production of asphalt is more environmentally friendly.…”

Section: Introductionmentioning

confidence: 99%

Rejuvenator Obtained by Pyrolysis of Waste Tires for Use in Asphalt Mixtures with Added Reclaimed Asphalt

Ržek¹,

Turk²,

Tušar³

2022

Recent Perspectives in Pyrolysis Research

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Although in recent years, big progress has been made in the field of recovering waste tires, they still represent an unwanted waste and their production is constantly increasing. We can use waste tires as a raw material for a new product. In our study, multiple liquid products were produced by pyrolysis of waste tires. After extensive testing of their properties, we selected the most suitable pyrolytic product for the purpose of rejuvenation. Rejuvenators are designed to soften the old, brittle and stiff aged bitumen in reclaimed asphalt. Bitumen with its viscoelastic characteristics is the most important component of asphalt and dictates its behaviour. Commonly bitumen, after adding rejuvenator, becomes less viscous, more ductile and its coating properties are restored. By using a pyrolytic rejuvenator, the proportion of reclaimed asphalt added to the asphalt mixture was increased. The reuse of reclaimed asphalt and waste tires means a reduction in waste material and is therefore important for the preservation of the environment and sustainable development.

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Rheological Analysis of Bitumen Modified by Waste Tire Powder Pyrolytic Oil Residue

Kebritchi

Shams

Firoozifar

et al. 2022

Int. J. Pavement Res. Technol.

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Modelling rheological characteristics of rejuvenated aged bitumen

Cited by 9 publications

References 19 publications

Storage stability performance of composite modified asphalt with scrap non-tire automotive rubber, waste plastic pyrolytic oil and sulfur

Storage stability performance of composite modified asphalt with scrap non-tire automotive rubber, waste plastic pyrolytic oil and sulfur

Rejuvenator Obtained by Pyrolysis of Waste Tires for Use in Asphalt Mixtures with Added Reclaimed Asphalt

Rheological Analysis of Bitumen Modified by Waste Tire Powder Pyrolytic Oil Residue

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