Are totally recycled hot mix asphalts a sustainable alternative for road paving?

Silva, Hugo Manuel Ribeiro Dias da; Oliveira, Joel; Jesus, Carlos M. G.

doi:10.1016/j.resconrec.2011.11.013

Cited by 181 publications

(94 citation statements)

References 8 publications

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“…The mixtures produced using RAP exhibited higher modulus [28][29][30][31][32][33][34][35][36]. In Europe, studies have been conducted to stimulate the use of up to 60% RAP material [37][38][39].…”

Section: Use Of Rap In Hmamentioning

confidence: 99%

Use of reclaimed asphalt pavement (RAP) in warm mix asphalt (WMA) pavements: a review

Farooq

Mir

2017

Innov. Infrastruct. Solut.

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The limit in the use of reclaimed asphalt pavement material (RAP) proportion is restricted due to stiffness and workability issues related to RAP. This problem is addressed with the help of warm mix asphalt (WMA) which increases the proportion of RAP used by producing mixes having same/better properties viz., better workability, reduced viscosity than hot mix asphalt (HMA) at lower temperatures. This paper reviews research conducted on the use of RAP material in WMA pavements. It presents and discusses work done with regard to different recycling methods and on conversion of RAP into HMA. It analyzes the benefits/need of using RAP in WMA in light of previous research findings and the influence on engineering properties of WMA due to RAP introduction. This paper also discusses field performance, environmental/economic impact and some limitations of these mixes.

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Section: Use Of Rap In Hmamentioning

confidence: 99%

Use of reclaimed asphalt pavement (RAP) in warm mix asphalt (WMA) pavements: a review

Farooq

Mir

2017

Innov. Infrastruct. Solut.

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“…For this purpose, when high RA contents (>30%) are used, the fresh binder to be added should be soft (high penetration grade), or rejuvenating agents or fluxes should be used in order to be able to restore some of the properties of the RA binder Silva et al, 2012;Zaumanis et al, 2014). Nevertheless, these techniques still imply the use of petroleum-based resources that are non-renewable.…”

Section: Introductionmentioning

confidence: 99%

Linear viscoelastic properties of high reclaimed asphalt content mixes with biobinders

Carrión

Presti

Pouget

et al. 2017

Road Materials and Pavement Design

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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.

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“…However, the selection of waste material to be used for pavement construction, particularly asphalt surface layer, is of high importance as the application of waste should not adversely influence the structural and functional aspects of the pavements [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Mechanical Properties of Recycled Material for Utilization in Asphalt Mixtures

et al. 2017

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Abstract:With an expanding world, the demand for extensive road networks is increasing. As natural resources become scarce, the necessity of finding alternative resources has led to the idea of applying recycled material to pavement construction including asphalt pavements. Amongst all asphalt components, aggregate constitutes the largest part of asphalt mixtures. Therefore, the utilization of recycled material for aggregate will represent an important opportunity to save virgin material and divert material away from landfills. Because of the large amount of construction waste generation around the world, using recycled construction aggregate (RCA) in asphalt mixtures appears to be an effective utilization of RCA. However, as aggregate plays an important role in the final performance of the asphalt mixture, an understanding of their properties is essential in designing an asphalt mixture. Therefore, in this research, the properties of RCA have been evaluated through laboratory investigations. Based on the test results, it is required that combination of RCA with some other targeted waste materials be considered in asphalt mixture. This paper presents the results of an experimental study to evaluate the RCA properties as an alternative for virgin aggregate in asphalt mixture under different percentages and combination with other aggregates, such as reclaimed asphalt pavement (RAP) and basalt.

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Are totally recycled hot mix asphalts a sustainable alternative for road paving?

Cited by 181 publications

References 8 publications

Use of reclaimed asphalt pavement (RAP) in warm mix asphalt (WMA) pavements: a review

Use of reclaimed asphalt pavement (RAP) in warm mix asphalt (WMA) pavements: a review

Linear viscoelastic properties of high reclaimed asphalt content mixes with biobinders

Evaluation of Mechanical Properties of Recycled Material for Utilization in Asphalt Mixtures

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