Characterization of Recovered Bitumen from Coarse and Fine Reclaimed Asphalt Pavement Particles

Saliani, Saeed S.; Carter, Alan; Baaj, Hassan; Mikhailenko, Peter

doi:10.3390/infrastructures4020024

Cited by 6 publications

(4 citation statements)

References 25 publications

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“…Previous research has shown that the bitumen recovered from coarse particles differ from fine particles [28]. They concluded that RAP bitumen participation in hot mix process significantly depends on RAP size.…”

Section: Infrastructures 2019 4 X For Peer Review 4 Of 23mentioning

confidence: 94%

Characterization of Asphalt Mixtures Produced with Coarse and Fine Recycled Asphalt Particles

et al. 2019

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Utilizing recycled asphalt pavements (RAP) in pavement construction is known as a sustainable approach with significant economic and environmental benefits. While studying the effect of high RAP contents on the performance of hot mix asphalt (HMA) mixes has been the focus of several research projects, limited work has been done on studying the effect of RAP fraction and particle size on the overall performance of high RAP mixes produced solely with either coarse or fine RAP particles. To this end, three mixes including a conventional control mix with no RAP, a fine RAP mix (FRM) made with 35% percent fine RAP, and a coarse RAP mix (CRM) prepared with 54% of coarse RAP were designed and investigated in this study. These mixes were evaluated with respect to their rutting resistance, fatigue cracking resistance, and low temperature cracking performance. The results indicate that although the CRM had a higher RAP content, it exhibited better or at least the same performance than the FRM. The thermal stress restrained specimen testing (TSRST) results showed that the control mix performed slightly better than the CRM, while the FRM performance was adversely affected with respect to the transition temperature midpoint and the maximum tensile stress temperature. Both of the RAP incorporated mixes exhibited better rutting resistance than the control mix. With regard to fatigue cracking, the CRM performed better than the FRM. It can be concluded that the RAP particle size has a considerable effect on its contribution to the total binder content, the aggregate skeleton of the mix, and ultimately the performance of the mix. In spite of the higher RAP content in the CRM versus FRM, the satisfactory performance observed for the CRM mix indicates a great potential in producing high RAP content mixes through optimizing the RAP particle size and content. The results also suggest that the black curve gradation assumption is not representative of the actual RAP particles contribution in a high RAP mix.

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Section: Infrastructures 2019 4 X For Peer Review 4 Of 23mentioning

confidence: 94%

Characterization of Asphalt Mixtures Produced with Coarse and Fine Recycled Asphalt Particles

et al. 2019

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“…The gap-graded blending method was developed by the Huang et al ( 7 ), Shirodkar et al ( 12 ) and Yu et al ( 13 ). Although the aging degree of coarse and fine RAP binders is different ( 14 ), the mixtures consist of more fine RAP aggregate (0–4.75 mm) than coarse RAP aggregate (4.75–9.5 mm) for a single gradation of RAP micro-surfacing ( 5 ). Therefore, this method mixes a fine RAP mixture with coarse virgin aggregate and virgin binder so that it is easy to separate the RAP aggregate and virgin aggregate after mixing.…”

Section: Methodsmentioning

confidence: 99%

Blending Efficiency and Effective Styrene Butadiene Rubber Concentration of Micro-Surfacing Mixtures with Reclaimed Asphalt Pavement

Wang

Shen

2020

Transportation Research Record: Journal of the Transportation R

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Reclaimed asphalt pavement (RAP) has been used in micro-surfacing mixtures with good promise and improved sustainability. However, no systematic study has been conducted to analyze the chemical components of the RAP micro-surfacing mixture when blending virgin binder with RAP binder, and to confirm the reasonableness of using RAP micro-surfacing mixtures. Based on a gap-graded method, this paper explored the chemical properties of RAP micro-surfacing mixtures using attenuated total reflectance–Fourier transform infrared spectroscopy (ATR-FTIR) and fluorescence microscopy, and explained the blending mechanism between the RAP and the cold mixture. The blending efficiency and effective styrene butadiene rubber (SBR) concentration were quantified based on various chemical component parameters. The results showed that partial blending existed for RAP micro-surfacing mixtures. It was found that the diffusion happened from the outer layer of the RAP mixture as a result of the coating of emulsion, and could continuously and gradually happen for the RAP mixture, giving higher blending efficiency for a high RAP content mixture. The addition of RAP makes SBR particles more dispersible. Including rejuvenators and increasing curing time could improve the blending efficiency and the effective modifier concentration.

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“…Recycled materials of different origins, such as construction and demolition waste [7][8][9][10][11][12][13], plastics [14][15][16][17][18][19][20], rubber [21][22][23][24][25][26], reclaimed asphalt [10,19,24,25,[27][28][29][30][31][32][33][34][35][36][37], and mineral sludge [38][39][40][41][42][43][44], have the potential for recycling in road pavement materials, making the performance of the corresponding mixtures in which they are employed comparable to those obtained with totally virgin components.…”

Section: Introductionmentioning

confidence: 99%

Life Cycle Assessment of Environmentally Friendly Solutions for the Construction of Unpaved Rural Roads

Di Sessa,

Riviera,

Tsantilis

et al. 2023

Infrastructures

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In recent decades, the international community has recognized the detrimental impact of the construction industry on the environment. In recent years, the use of recycled aggregates has attracted increasing interest as a sustainable and cost-effective solution for the construction and maintenance of road pavements. The life cycle assessment (LCA) represents a valuable methodology for evaluating the environmental sustainability of technologies involving the use of such materials. This study deals with the LCA of alternative solutions for the construction and maintenance of unpaved rural roads. Different scenarios using recycled materials, such as reclaimed asphalt and mineral sludge, are analyzed and compared to a reference solution that employs only virgin aggregates. The environmental sustainability of the proposed alternatives is assessed by considering the global warming potential (GWP), energy requirements, and water consumption. The LCA analysis is performed using SimaPro software (version 9.1.1.7). The obtained results demonstrate that solutions involving the use of recycled materials represent a more sustainable and environmentally friendly option. In particular, a significant reduction in water depletion was found for the alternative scenarios, with savings between 56% and 99%. For GWP and energy, the total savings ranged from approximately 20% to 40%.

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Characterization of Recovered Bitumen from Coarse and Fine Reclaimed Asphalt Pavement Particles

Cited by 6 publications

References 25 publications

Characterization of Asphalt Mixtures Produced with Coarse and Fine Recycled Asphalt Particles

Characterization of Asphalt Mixtures Produced with Coarse and Fine Recycled Asphalt Particles

Blending Efficiency and Effective Styrene Butadiene Rubber Concentration of Micro-Surfacing Mixtures with Reclaimed Asphalt Pavement

Life Cycle Assessment of Environmentally Friendly Solutions for the Construction of Unpaved Rural Roads

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