Introducing a soybean oil-derived material as a potential rejuvenator of asphalt through rheology, mix characterisation and Fourier Transform Infrared analysis

Elkashef, Mohamed; Podolsky, Joseph H.; Williams, R. Christopher; Cochran, Eric W.

doi:10.1080/14680629.2017.1345781

Cited by 45 publications

(14 citation statements)

References 24 publications

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“…The results of chromatography and fourier-transform infrared spectroscopy (FTIR) testing reveal that aging decreases the asphaltene content of binder and increases the intensity of carbonyl bonds in the aged binder, respectively (Elkashef et al, 2017;Yang et al, 2014). Chromatography shows that the addition of waste vegetable oil to aged asphalt binder decreases the asphaltene content (Chen et al, 2014;Asli et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Investigating short-term and long-term binder performance of high-RAP mixtures containing waste cooking oil

Majidifard

Tabatabaee

Buttlar

2019

Journal of Traffic and Transportation Engineering (English Edit

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Highlights The use of waste cooking oil as a recycling agent opens the possibility for the routine design of 60-to-nearly-100% recycled content asphalt paving mixtures. Aging susceptibility of recycled binders with waste cooking oil is higher than virgin binder. Oil has a greater effect on reducing the stiffness of RAP binder than increasing its m-value. Waste cooking oil tended to improve mixture workability and low temperature performance while reducing moisture and rutting resistance. Selecting the optimum oil content as equal to the average oil content based on satisfying the LT and HT PG can assure short-term and long-term performance. AbstractThe environmental and economic benefits of recycling asphalt pavements have received much attention in recent years. Because of the increase in the cost of raw materials and energy carriers, the reuse of large portions of reclaimed asphalt pavement (RAP) is critical in reducing both the cost and environmental footprint of asphalt pavements. High-RAP mixtures are more prone to low temperature cracking and poor mixture workability because of the higher stiffness of RAP binder. Recycling agents are one of the additives which are used to improve these deficiencies. However, there is some ambiguity about the optimum content of recycling agent to assure proper performance of recycled asphalt pavement during its service life. The current study used 60% and 100% fractionated RAP with waste cooking oil as a recycling agent and crumb rubber to alleviate the aforementioned problems.Laboratory evaluation showed that increasing the amount of recycling agent in the high-RAP mixtures improved their workability and low temperature performance while decreasing moisture damage and rutting resistance. The long-term susceptibility to aging of recycled binder with the organically-based recycling agent was also investigated. A procedure to obtain the optimum percentage of recycling agent was devised to strike a balance between the performance characteristics of mixtures with a high-RAP content.

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Section: Introductionmentioning

confidence: 99%

Investigating short-term and long-term binder performance of high-RAP mixtures containing waste cooking oil

Majidifard

Tabatabaee

Buttlar

2019

Journal of Traffic and Transportation Engineering (English Edit

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“…This is given by the sum of carbonyl index (CI) and sulfoxide index (SI) defined, as suggested in Marsac et al [58], as the area of the carbonyl and sulphoxide signal, respectively, normalized, to the peaks related to the asymmetric vibration of CH2 and CH3 (around 1455 cm −1 ) and to the symmetric deformation vibration of CH3 (around 1376 cm −1 ) as the latter areas do not change significantly. It must be noted that here the Authors use the same indices as Nayak and Sahoo, by considering the area of the FT-IR signals (and Elkashef et al [59] also used the FT-IR-ATR analysis to explore the effect of soybean-derived rejuvenator on two different kinds of performance grade bitumen. The types of bitumen, PG 64-28 and PG 58-28, were aged by Rolling Thin Film Oven Test (RTFOT, similar but slightly different in parameters values from TFOT technique) and pressure-aging-vessel (PAV) methods, and then they were doped with 0.75% of soybean-derived rejuvenator.…”

Section: Rejuvenation May Be Uncorrelated With Ir Functional Groups: Need Of Chromatographymentioning

confidence: 99%

A Review on Bitumen Rejuvenation: Mechanisms, Materials, Methods and Perspectives

et al. 2019

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This review aims to explore the state of the knowledge and the state-of-the-art regarding bitumen rejuvenation. In particular, attention was paid to clear things up about the rejuvenator mechanism of action. Frequently, the terms rejuvenator and flux oil, or oil (i.e., softening agent) are used as if they were synonymous. According to our knowledge, these two terms refer to substances producing different modifications to the aged bitumen: they can decrease the viscosity (softening agents), or, in addition to this, restore the original microstructure (real rejuvenators). In order to deal with the argument in its entirety, the bitumen is investigated in terms of chemical structure and microstructural features. Proper investigating tools are, therefore, needed to distinguish the different mechanisms of action of the various types of bitumen, so attention is focused on recent research and the use of different investigation techniques to distinguish between various additives. Methods based on organic synthesis can also be used to prepare ad-hoc rejuvenating molecules with higher performances. The interplay of chemical interaction, structural changes and overall effect of the additive is then presented in terms of the modern concepts of complex systems, which furnishes valid arguments to suggest X-ray scattering and Nuclear Magnetic Resonance relaxometry experiments as vanguard and forefront tools to study bitumen. Far from being a standard review, this work represents a critical analysis of the state-of-the-art taking into account for the molecular basis at the origin of the observed behavior. Furnishing a novel viewpoint for the study of bitumen based on the concepts of the complex systems in physics, it constitutes a novel approach for the study of these systems.

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“…Seidel [ 30 ] conducted high-temperature rheological tests of asphalt binders modified with soy fatty acids (SFAs), and found that small proportional additions of SFAs can produce asphalt binders that are less stiff and more workable. Elkashef et al [ 31 , 32 , 33 , 34 ] studied the physical and chemical properties of an aged asphalt binder that was rejuvenated with SBO using the DSR, BBR, FTIR and GC-MS tests, respectively. The test results show that the SBO rejuvenator can significantly improve the low-temperature and fatigue performance of an asphalt binder, including reducing its sensitivity to temperature.…”

Section: Introductionmentioning

confidence: 99%

Characterizing the Diffusion and Rheological Properties of Aged Asphalt Binder Rejuvenated with Bio-Oil Based on Molecular Dynamic Simulations and Laboratory Experimentations

Zhang

Chao²,

Zhou

et al. 2021

Molecules

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Soybean-derived bio-oil is one of the vegetable-based oils that is gaining the most interest for potential use in the rejuvenation of aged asphalt binders. This laboratory study was conducted to characterize and quantify the diffusion and rheological properties of bio-oil-rejuvenated aged asphalt binder (BRAA) using soybean oil. In the study, the chemical structure of the soybean oil was comparatively characterized using an element analyzer (EA), gel permeation chromatography (GPC), and a Fourier infrared (FTIR) spectrometer, respectively. Based on the chemical structure of the bio-oil, BRAA molecular models were built for computing the diffusion parameters using molecular dynamic simulations. Likewise, a dynamic shear rheometer (DSR) test device was used for measuring and quantifying the rheological properties of the aged asphalt binder rejuvenated with 0%, 1%, 2%, 3%, 4%, and 5% soybean oil, respectively. The laboratory test results indicate that bio-oil could potentially improve the diffusion coefficients and phase angle of the aged asphalt binder. Similarly, the corresponding decrease in the complex shear modulus has a positive effect on the low-temperature properties of BRAA. For a bio-oil dosage 4.0%, the diffusion coefficients of the BRAA components are 1.52 × 10−8, 1.33 × 10−8, 3.47 × 10−8, 4.82 × 10−8 and 3.92 × 10−8, respectively. Similarly, the corresponding reduction in the complex shear modulus from 1.27 × 107 Pa to 4.0 × 105 Pa suggests an improvement in the low-temperature properties of BRAA. Overall, the study contributes to the literature on the potential use of soybean-derived bio-oil as a rejuvenator of aged asphalt binders.

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Introducing a soybean oil-derived material as a potential rejuvenator of asphalt through rheology, mix characterisation and Fourier Transform Infrared analysis

Cited by 45 publications

References 24 publications

Investigating short-term and long-term binder performance of high-RAP mixtures containing waste cooking oil

Investigating short-term and long-term binder performance of high-RAP mixtures containing waste cooking oil

A Review on Bitumen Rejuvenation: Mechanisms, Materials, Methods and Perspectives

Characterizing the Diffusion and Rheological Properties of Aged Asphalt Binder Rejuvenated with Bio-Oil Based on Molecular Dynamic Simulations and Laboratory Experimentations

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