Effect of two novel bio-based rejuvenators on the performance of 50% RAP mixes – a statistical study on the complex modulus of asphalt binders and asphalt mixtures

Sotoodeh-Nia, Zahra; Manke, Nicholas; Williams, R. Christopher; Cochran, Eric W.; Porot, Laurent; Chailleux, Emmanuel; Presti, Davide Lo; Carrión, Ana Jiménez del Barco; Blanc, Juliette

doi:10.1080/14680629.2019.1661276

Cited by 11 publications

(3 citation statements)

References 14 publications

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“…A main conclusion drawn from RA studies is that high amounts (i.e. 50% RA) could be incorporated into asphalt mixtures with suitable biobinders, restoring their rheological properties and enhancing the performance of the mixture [116][117][118][119][120]. Such bio-derived mixtures with RA can sufficiently pass the design requirements for pavements and perform well at low, intermediate and high temperatures without the need of neat bitumen [121].…”

Section: Biobinder and Recycled Asphalt Studiesmentioning

confidence: 99%

Renewable binders from waste biomass for road construction: A review on thermochemical conversion technologies and current developments

Weir

Carrión

Queffélec

et al. 2022

Construction and Building Materials

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Section: Biobinder and Recycled Asphalt Studiesmentioning

confidence: 99%

Renewable binders from waste biomass for road construction: A review on thermochemical conversion technologies and current developments

Weir

Carrión

Queffélec

et al. 2022

Construction and Building Materials

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“…Nevertheless, in order for these technologies to success, the deteriorated properties of reclaimed binders, arising from ageing processes, must be restored, which can be achieved by means of the so-called rejuvenators. Rejuvenating products are aimed at restoring the physical and chemical properties of the aged binder, replenishing the volatile and dispersing oils, while also promoting adhesion [6][7][8][9][10], in order to reduce fatigue and low-temperature cracking problems [8].…”

Section: Introductionmentioning

confidence: 99%

Ageing Effects on a Softened Bitumen by the Addition of DSA (Dodecenyl Succinic Anhydride)

et al. 2022

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The softening of aged bitumen is necessary for a successful asphalt rejuvenation in road recycling operations. Thus, this study proposes a novel and successful approach by using Dodecenyl Succinic Anhydride (DSA), a reactive surfactant with a polar head capable of reacting with some polar compounds of bitumen. On this basis, this paper analyses the softening potential and ageing inhibition capability of the addition of 3 wt.% DSA before and after the application of standard laboratory ageing methods (rolling thin film oven, RTFOT and pressure aging vessel (PAV) tests). To that end, different modified bitumens were evaluated by analysing the linear viscoelastic behaviour, viscous flow properties, thin layer chromatography, Fourier transform infrared spectroscopy (FTIR), contact angle measurements and compactibility tests. The results obtained for DSA show its greater potential to soften a model bitumen, when compared to a diluent oil, through physico-chemical processes that bring about a lowering in the polarity along with the alteration of its colloidal stability. Even though ageing processes in bitumen negatively affect its softening capacity, the developed structures still retain the ability to partially compensate for the adverse hardening effects. Furthermore, DSA addition greatly enhances the binder’s wettability on a siliceous-type aggregate and favours asphalt compaction.

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“…This implies that pavement engineers should be alerted and embody materials engineering in order to contribute towards safer roads in conjunction with the vehicle industry requests since road safety during vehicles' braking is imperative in modern societies. Towards this, the use of reclaimed asphalt pavement (RAP) has been extensively used in many nations with a view to limiting the need for virgin aggregates [6,7]. Besides, in order to limit the use of asphalt bitumen bio-materials in form additives in asphalt mixtures such as the reacted activated rubber (RAR) in form of crumbs have been tested [8,9].…”

Section: Introductionmentioning

confidence: 99%

How Can Sustainable Materials in Road Construction Contribute to Vehicles’ Braking?

2020

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Vehicles’ braking is a key factor towards safer driving. In particular, tyre–pavement friction is connected with both industry and infrastructure requirements in terms of tyre characteristics and frictional properties of pavement surfaces respectively that both contribute to safe braking. For this reason, tyre–pavement friction is considered as one of the most pressing emergencies in roadway assets in order to reduce skidding related accidents. At the same time, sustainability aspects have been raised in modern infrastructure engineering. Hence, an issue is introduced on how sustainable materials used for pavement construction may contribute to tyre–pavement and consequently vehicles’ braking. For this reason, a laboratory process is developed to investigate the frictional properties of several utilized in pavement wearing courses including both traditional and sustainable materials (reacted activated rubber—RAR and reclaimed asphalt pavement—RAP). Environmental conditions (seasonal temperature changes, rainfall effect and contamination caused by dust formation) are simulated in the laboratory and vehicles’ braking is investigated using the British Pendulum Tester (BPT). Results provide a good explanation for the vehicles’ braking ability under the investigated conditions for both traditional and sustainable materials. Ultimately, it is proved that asphalt mixture types with RAR modifier or RAP material exhibit a satisfactory performance towards providing a safe road surface for the moving vehicles.

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Effect of two novel bio-based rejuvenators on the performance of 50% RAP mixes – a statistical study on the complex modulus of asphalt binders and asphalt mixtures

Cited by 11 publications

References 14 publications

Renewable binders from waste biomass for road construction: A review on thermochemical conversion technologies and current developments

Renewable binders from waste biomass for road construction: A review on thermochemical conversion technologies and current developments

Ageing Effects on a Softened Bitumen by the Addition of DSA (Dodecenyl Succinic Anhydride)

How Can Sustainable Materials in Road Construction Contribute to Vehicles’ Braking?

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