A study to determine the degree of partial blending of reclaimed asphalt pavement (RAP) binder for high RAP hot mix asphalt

Shirodkar, Prashant; Mehta, Yusuf; Nolan, Aaron; Sonpal, Khyati; Norton, A.; Tomlinson, Chris; Dubois, Éric; Sullivan, P. J. E.; Sauber, Robert W

doi:10.1016/j.conbuildmat.2010.06.045

Cited by 193 publications

(86 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This value is higher than that of the reference mixture because of the higher amount of RAP included. In fact, not all the aged binder coming from RAP takes part in the blending process (Shirodkar et al 2011;Frigio et al 2014;Stimilli et al 2015b). Therefore, as the RAP percentage increases, the amount of aged inactive binder (black aggregate) increases as well (Frigio et al 2014).…”

Section: Methodsmentioning

confidence: 96%

In Plant Production of Hot Recycled Mixtures with High Reclaimed Asphalt Pavement Content: A Performance Evaluation

et al. 2015

View full text Add to dashboard Cite

Nevertheless hot recycling process is nowadays a widespread technique, many doubts related to the in plant recycling process effects on the performance of recycled mixtures still exist and limit the maximum allowable amount of Reclaimed Asphalt Pavement (RAP). Therefore, the feasibility of an efficient production of plant hot recycled mixtures characterized by high RAP content and suitable performance should be properly addressed. To this aim, the overall performance of hot recycled asphalt mixtures produced in asphalt plant and containing high RAP content were assessed in this study. The mixtures were prepared with two different bitumens (high and low content of SBS polymer modifier) and 40 % of RAP only deriving from asphalt layers containing polymer modified bitumens. The aggregate grading curve was previously optimized through a specific laboratory study by applying the Bailey Method and using selected RAP. A third mixture, currently used for binder layers in motorway pavements, was also studied for comparative purposes. Compactability, stiffness, cracking and rutting resistance and fatigue behavior were investigated. Results of the mechanical tests suggest that mixtures containing 40 % RAP are suitable for the production of new asphalt pavements, especially when low modified bitumens are used. In fact, the performance of such mixtures were comparable or even higher than those of the reference mixture. In particular, the specific and accurate mix design allowed the potential drawbacks due to higher RAP content to be balanced.

show abstract

Section: Methodsmentioning

confidence: 96%

In Plant Production of Hot Recycled Mixtures with High Reclaimed Asphalt Pavement Content: A Performance Evaluation

et al. 2015

View full text Add to dashboard Cite

show abstract

“…The blends' compositions were determined by calculating the percentage that would be present in 50% RA mixtures with a 5% total binder content and assuming full blending (all RA binder in the mixture would activate and blend with the fresh binders). This blending assumption was made taking into account previous studies which showed that when high RA amounts are added to a new mix, high blending between fresh and RA binders may occur (McDaniel et al, 2012;Shirodkar et al, 2011;Soleymani et al, 2000). Nevertheless, the actual blending percentage remained unknown at this point of the investigation and the blends produced could be the different than the final binder present in the mixture.…”

Section: Bindersmentioning

confidence: 99%

Linear viscoelastic properties of high reclaimed asphalt content mixes with biobinders

Carrión

Presti

Pouget

et al. 2017

Road Materials and Pavement Design

View full text Add to dashboard Cite

The use of high Reclaimed Asphalt (RA) content mixtures together with binders produced from renewable resources (biobinders) is one of the current challenges in pavement engineering research. On one hand, RA has been used for decades but there are still some concerns about its performance, especially when high contents are used (>30%). On the other hand, biobinders are relatively new materials which have to be deeply characterised and studied in order to develop good-practices for their use. In this paper, linear viscoelastic properties of biobinders and bio-mixtures manufactured with high-RA content and biobinders are analysed and discussed.High-modulus mixtures with 50% RA were selected for the mix design. Binders and mixtures were tested over a wide range of asphalt service temperatures and frequencies by means of DSR and two-point bending tests respectively. Results show that biobinders have an important effect on mixtures behaviour. However, no direct links between their linear viscoelastic properties were found. Bio-asphalt mixtures still need further development for commercial exploitation; however the take-away fact of this investigation is that it is possible to manufacture asphalt-like mixtures with acceptable viscoelastic properties while being composed only of RA and non-petroleum based binders.

show abstract

“…Studies in Europe and the United States have concluded that over 80% of the recycled material is reused in the construction of roads, but regulations are still strict allowing inclusion of RAP in proportions ranging between 5 and 50% for production of new Hot Mix Asphalt (HMA) mixtures (Mengqi et al, 2012). Recent researches (Celauro et al, 2010;Shirodkar et al, 2011) have established that RAP replacement at proportions above 50% is feasible to produce new HMA mixtures, obtaining satisfactory results in the mechanical properties. Likewise, the susceptibility to moisture damage was low (Tensile Strength Ratio (TSR) values close to 95%).…”

Section: Recycled Asphalt Pavementmentioning

confidence: 99%

Characterization of Recycled Asphalt Pavement (RAP) for Use in Flexible Pavement

El-Maaty¹,

Elmohr²

2015

American Journal of Engineering and Applied Sciences

View full text Add to dashboard Cite

Due to economical reasons and the need for environmental conservatism, there has been an increasing shift towards the use of Recycled Asphalt Pavement (RAP) materials in the pavement construction industry. The majority of HMA mixtures in Egypt are produced only from virgin materials although there are about 4 million tons per year of reclaimed asphalt materials, due to continuous pavement milling or scraping processes, are not used. High durability potential usually implies that the mechanical behavior of the mixture will endure for a long service life. Now, flexible pavement, made of Hot-Mix Asphalt (HMA) with the addition of the reclaimed asphalt pavement granules in the central asphalt mixing plant, is increasingly used. The main objective of this paper is to investigate the use of a homogeneity reclaimed asphalt pavement in the pavement industry evaluating the effects of partial and total replacements of aggregates by RAP on the mechanical and durability performance of dense-graded HMA mixtures. The performance of RAP mixtures was evaluated through a series of laboratory tests including Marshall test, indirect tensile strength test, granule adhesion test and material test systems. A series of binder mixes containing varying percentages of RAP were designed and subjected to different moisture conditioning periods (1, 3 and 7 days) to investigate the moisture damage effect on RAP mixtures. The laboratory results indicated that when properly designed, the asphalt mixes with RAP especially at 50 to 100% replacement ratio provided better performance compared to those of new conventional HMA mixtures where they minimized the environmental impacts through the reduction of energy consumption, improved the mechanical properties, durability performance and also stripping resistance.

show abstract

A study to determine the degree of partial blending of reclaimed asphalt pavement (RAP) binder for high RAP hot mix asphalt

Cited by 193 publications

References 4 publications

In Plant Production of Hot Recycled Mixtures with High Reclaimed Asphalt Pavement Content: A Performance Evaluation

In Plant Production of Hot Recycled Mixtures with High Reclaimed Asphalt Pavement Content: A Performance Evaluation

Linear viscoelastic properties of high reclaimed asphalt content mixes with biobinders

Characterization of Recycled Asphalt Pavement (RAP) for Use in Flexible Pavement

Contact Info

Product

Resources

About