Improved durability of recycled porous asphalt

Frigio, F.; Pasquini, Emiliano; Ferrotti, Gilda; Canestrari, Francesco

doi:10.1016/j.conbuildmat.2013.07.044

Cited by 38 publications

(17 citation statements)

References 15 publications

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“…Moreover, the worse response of mix PA-ELL with 100% slag can be explained by the higher void content that makes them more prone to raveling. A direct correlation between voids and the corresponding abrasion resistance is evident in the literature, in particular for porous asphalt [83,89,90].…”

Section: Resultsmentioning

confidence: 99%

Performance and Durability of Porous Asphalt Mixtures Manufactured Exclusively with Electric Steel Slags

et al. 2019

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Electric arc furnace slag (EAFS) and ladle furnace slag (LFS) are by-products of the electric steelmaking sector with suitable properties for use in bituminous mixtures as both coarse and fine aggregates, respectively. In this research, the production of a porous asphalt mixture with an aggregate skeleton consisting exclusively of electric steelmaking slags (using neither natural aggregates nor fillers) is explored. The test program examines the asphalt mixtures in terms of their mechanical performance (abrasion loss and indirect tensile strength), durability (cold abrasion loss, aging, and long-term behavior), water sensitivity, skid and rutting resistance, and permeability. The results of the slag-mixes are compared with a standard mix, manufactured with siliceous aggregates and cement as filler. The porous mixes manufactured with the slags provided similar results to the conventional standard mixtures. Some issues were noted in relation to compaction difficulties and the higher void contents of the slag mixtures, which reduced their resistance to raveling. Other features linked to permeability and skid resistance were largely improved, suggesting that these mixtures are especially suitable for permeable pavements in rainy regions. In conclusion, a porous asphalt mixture was produced with 100% slag aggregates that met current standards for long-lasting and environmentally friendly mixtures.

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Section: Resultsmentioning

confidence: 99%

Performance and Durability of Porous Asphalt Mixtures Manufactured Exclusively with Electric Steel Slags

et al. 2019

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“…A previous laboratory study focused on the influence of RAP content on porous asphalt (PA) mixtures Frigio, Pasquini, Ferrotti, & Canestrari, 2013), carried out considering various percentages by total aggregate weight (15%, 20% and 25% of fractioned RAP 8/16 mm), allowed important considerations to be drawn about the re-activated RAP binder portion. Three total binder contents (5.25%, 5.50% and 5.75%) were considered for each mixture in order to select the suitable mix design for each recycled PA.…”

Section: Experimental Backgroundmentioning

confidence: 99%

New method to estimate the “re-activated” binder amount in recycled hot-mix asphalt

Stimilli

Virgili

Canestrari

2015

Road Materials and Pavement Design

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The magnitude of the binder re-activation within the reclaimed asphalt pavement (RAP) fraction is a major concern when recycled hot-mix asphalt (HMA) is produced, since it directly affects the final performance of the mix. Currently, no reliable methods to predict the RAP binder re-activation are available and the lack of such information prevents the quantification of the proper amount of virgin binder to be added to the recycled HMA.This study proposes a new method to estimate the re-activated binder amount based on the surface area (SA) of RAP aggregates. Laboratory results demonstrated the effectiveness of the SA approach in the case of RAP amounts typically used for hot-recycled HMA. Moreover, the experimental investigation suggested that revised coefficients are needed for the evaluation of the SA to account for the presence of clumps when high amounts of fine RAP aggregates are used.

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“…Frequency sweep and time sweep tests were undertaken by means of a Dynamic Shear Rheometer (DSR). The NCHRP Report 459 [17] suggested a method to analyse the fatigue performance of binders through the application of a cyclic shear load to sample at a fixed frequency and strain/stress level until failure. The fatigue tests using the DSR were carried out under controlled stress conditions at 20 • C and a frequency of 10 Hz using the 8 mm plate testing geometry with a 2 mm gap.…”

Section: Bindersmentioning

confidence: 99%

“…The use of high RA content in asphalt mixtures has gleaned satisfactory results, proving the potential of using high RA content if it is carefully controlled and monitored [4][5][6][7][8][9][10]. Other studies have focused on proposing innovative methods for characterizing reclaimed asphalt and adapting asphalt mixture design methodologies [11][12][13][14][15][16][17][18][19] to take advantage of the RA component.…”

Section: Introductionmentioning

confidence: 99%

Binder and Mixture Fatigue Performance of Plant-Produced Road Surface Course Asphalt Mixtures with High Contents of Reclaimed Asphalt

Subhy¹,

Pires

Carrión

et al. 2019

Sustainability

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The aged properties of Reclaimed Asphalt (RA) binders are one of the main factors working against their utilisation in high-RA content (>30%) mixes for surface courses. Fatigue cracking is the main distress of surface courses that are manufactured with a high percentage of RA. This investigation presents results of the rheological and fatigue results of different asphalt mixtures and their recovered binders. The binders were recovered from asphalt mixtures that had been manufactured in asphalt plants using different amounts of RA with contents up to 60% with and without rejuvenators. Two different sources of RA were used, representing a moderately aged RA and an extremely aged RA. The Dynamic Shear Rheometer (DSR) was used to assess the fatigue-characteristics of the binders using time sweep tests while the fatigue characteristics of their mixtures were assessed using the Indirect Tensile Fatigue Test (ITFT). The fatigue data was analysed based on the cumulative dissipated energy approach in addition to traditional fatigue analysis. Results have shown that the ageing condition of RA significantly affects the fatigue properties of recovered binders. Binder and asphalt mixture fatigue results showed that RA contents up to 60% can produce comparable fatigue performance compared to lower percentages of RA in road surface course if the aged RA binder is sufficiently rejuvenated.

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Improved durability of recycled porous asphalt

Cited by 38 publications

References 15 publications

Performance and Durability of Porous Asphalt Mixtures Manufactured Exclusively with Electric Steel Slags

Performance and Durability of Porous Asphalt Mixtures Manufactured Exclusively with Electric Steel Slags

New method to estimate the “re-activated” binder amount in recycled hot-mix asphalt

Binder and Mixture Fatigue Performance of Plant-Produced Road Surface Course Asphalt Mixtures with High Contents of Reclaimed Asphalt

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