Linear viscoelastic behaviour of bituminous mixtures with multi-Recycled Asphalt Pavement

Pedraza, A.; Benedetto, Hervé Di; Sauzéat, Cédric; Pouget, Simon

doi:10.1201/9781315100333-26

Cited by 3 publications

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“…So far, the existing studies on the performance properties of R n AP have only been at the macroscale level. Based on the conclusions arrived by several researchers [ 81 , 82 , 83 , 85 ], the LVE properties of RAP binder is not significantly affected by multiple recycling, and when compared with virgin asphalt binder, R n AP at a maximum dosage of 40% has better rutting and fatigue resistance. However, such results can be further verified and well-supported by constructive microstructural characterization of the R n AP binder, which is still lacking in the literature.…”

Section: Reflections From the Literature Review And Perspectives For ...mentioning

confidence: 99%

“…There has been specific interest in how multiple recycling affects the performance properties of the resultant R n AP mixture. Through an eco-mixture formulation, previous studies [ 79 , 80 , 81 , 82 , 83 , 84 , 85 , 86 ] have shown that ACP can be subjected to several rounds of recycling without losing its properties. So far, attempts have been made to recycle ACP to a maximum of three times (R 3 AP), and the effects on properties including rutting resistance, fatigue cracking, water durability, viscosity, linear viscoelasticity, and low-temperature cracking were evaluated.…”

Section: State Of the Artmentioning

confidence: 99%

“…Although stiff binders produce mixtures with better rutting resistance and moisture resistance, they are usually prone to cracking. As shown in Figure 6 , some studies reported that multiple recycling does not significantly affect LVE properties [ 81 , 82 , 83 ], while others have shown improvements in rutting resistance [ 79 , 81 , 85 , 86 ] and fatigue cracking [ 81 ]. More recently, Pouget et al [ 85 ] investigated the effect of multiple recycling of RAP on different technical properties of asphalt mixes, including thermomechanical properties (linear viscoelasticity, thermomechanical coupling at low temperatures, and crack extension), moisture resistance, and mix compactness.…”

Section: State Of the Artmentioning

confidence: 99%

“… Effect of repeated recycling on mixture properties. Yang and Lee [ 86 ]; Pouget et al [ 85 ]; Pedraza et al [ 82 ]; Petho and Denneman [ 84 ]; Pedraza et al [ 83 ]; Idham and Hainin [ 81 ]; Pedraza et al [ 82 ]; Chen et al [ 79 ]. …”

Section: Figurementioning

confidence: 99%

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Maximizing the Application of RAP in Asphalt Concrete Pavements and Its Long-Term Performance: A Review

et al. 2022

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The use of recycled asphalt pavement (RAP) materials in asphalt concrete pavements (ACP) brings significant cost and environmental benefits. In practice, however, the amount of RAP readily available far exceeds the amount being utilized in ACPs, which still leaves the problem of excess RAP in the environment partially solved. Additionally, ACPs containing RAP materials (i.e., RAP-ACPs) can still be landfilled after they have reached the end of their useful life, which may restore the original environmental waste problem. To address these, researchers have demonstrated different ways to maximize the application of RAP in ACPs. Among them, the use of RAP in pavement preventive maintenance (PPM) treatments and the repeated recycling of RAP-ACPs (i.e., RnAP) are specifically discussed in this review. It is envisaged that, by promoting these two practices, the application and benefits of RAP can be further maximized to improve sustainability. This review also discusses the long-term behavior of RAP-ACP, which is crucial to inspire confidence in the wider application of RAP in ACP. Studies on RAP-PPM have shown that virgin PPM treatments can successfully accommodate RAP materials by adjusting their mix design. So far, research on RnAP has been limited to how multiple-recycling affects the performance properties of the blends, showing improvements in rutting resistance and moisture susceptibility but little effect on linear viscoelasticity and cracking. Overall, the lack of sufficient research is considered to be the biggest challenge in facilitating the implementation of these two sustainable RAP technologies. Little or nothing is known about the bonding mechanisms between RAP and fresh PPM binders, the molecular and chemical changes in RnAP binders, or the functional performance characteristics, actual pavement performance, and long-term performance of both RAP-PPM and RnAP blends. An understanding of these aspects is very relevant to maximize and continue the beneficial reuse of RAP in ACPs while safeguarding human and environmental health.

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Section: Reflections From the Literature Review And Perspectives For ...mentioning

confidence: 99%

Section: State Of the Artmentioning

confidence: 99%

Section: State Of the Artmentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

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Maximizing the Application of RAP in Asphalt Concrete Pavements and Its Long-Term Performance: A Review

et al. 2022

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“…Eventually, the downgrading of the removed bituminous mixture into a lower value product (i.e., aggregates for unbound layer) may be appropriate after several re-uses and recycling processes [ 1 ]. Indeed, some studies have revealed the possible multi-recycling aspect of the removed asphalt concrete [ 4 , 5 ], that is, the capacity of the material in being treated with multiple recycling processes without losing its properties and performing some valorisation actions when required [ 6 ]. The recycle and/or the re-use of removed bituminous mixture is an example of the sustainable development in the infrastructures sector.…”

Section: Introductionmentioning

confidence: 99%

The Challenges of Using Reclaimed Asphalt Pavement for New Asphalt Mixtures: A Review

2020

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Reclaimed Asphalt Pavement (RAP) material mainly consists of removed asphalt concretes from existing infrastructures and, to a minor extent, of wasted or rejected mixes during the production processes. Being composed of two valuable non-renewable resources, i.e., aggregates and bituminous binder, its conscious use can ensure the sustainability of asphalt pavement construction. Thanks to the use of RAP material in new asphalt products, the USA saved 4.1 million tons of virgin binder and 78 million tons of virgin aggregates in 2018. Therefore, the use of RAP for the production of new asphalt formulations at the top of the recycling hierarchy is preferable instead of being down-cycled in low-value applications. The RAP material represents one of the most re-used construction products worldwide; in 2018, approximately 88% wt. and 72% wt. of RAP were used in USA and Europe, respectively, as aggregates for Hot, Warm and Cold Asphalt Mixtures and for unbound layers. Several studies have revealed positive responses of the recycled asphalt mixtures with high or very high content of RAP. However, the common practices of many countries still limit the RAP content to a 15–20% wt., on average, in the recycled asphalt mixes. The amount of RAP in asphalt concretes can be significantly increased by applying good management practices of the RAP, either processed or not, as well as novel production technologies and advanced mix design approaches. This manuscript aims to summarize the state-of-the-art of use of RAP aggregates in new asphalt mixtures. The economic and environmental benefits are also discussed.

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Fracture Properties of Multirecycled Asphalt Mixes from Four-Point Bending Test Using Digital Image Correlation and Back Calculation

Pedraza

Benedetto

Sauzéat

et al. 2019

Journal of Testing and Evaluation

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Six different asphalt mixes were subjected to the four-point bending fracture tests designed at the University of Lyon/École Nationale des Travaux Publics de l’État (ENTPE). Among the six tested mixes, three were hot mixes and three were produced according to a warm process with foamed binder. For each of the two processes, the first mix contained 0 % reclaimed asphalt pavement (RAP). The second mix contained 40 % RAP from a milling process. The third mixes contained 40 % of the second mix, aged artificially in the lab and recycled. Two methods were applied to determine the crack propagation during fracture testing. The first one, called the displacement ratio method for predicting crack length, is based on displacements measurements. The second one used digital image correlation and strain field analysis. The two methods gave similar results for crack length values during the tests. The stress intensity factor (KIC) as a function of crack length was calculated. Results showed rather close fracture properties for the six mix types.

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Linear viscoelastic behaviour of bituminous mixtures with multi-Recycled Asphalt Pavement

Cited by 3 publications

References 0 publications

Maximizing the Application of RAP in Asphalt Concrete Pavements and Its Long-Term Performance: A Review

Maximizing the Application of RAP in Asphalt Concrete Pavements and Its Long-Term Performance: A Review

The Challenges of Using Reclaimed Asphalt Pavement for New Asphalt Mixtures: A Review

Fracture Properties of Multirecycled Asphalt Mixes from Four-Point Bending Test Using Digital Image Correlation and Back Calculation

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