Cold recycling of reclaimed asphalt pavement towards improved engineering performance

Wang, Yangyang; Leng, Zhen; Xi, Li; Hu, Chichun

doi:10.1016/j.jclepro.2017.10.132

Cited by 85 publications

(22 citation statements)

References 10 publications

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“…In recent years, public concern about emissions and environmental pollution has increased. For this reason, there have been advances in sustainable technologies that reduce the environmental impacts of road development [20,21]. Similarly, the environmental component has been considered as a fundamental aspect in the pavement management system.…”

Section: Introductionmentioning

confidence: 99%

Sustainable Decision-Making in Road Development: Analysis of Road Preservation Policies

Ruiz

Guevara

2020

Sustainability

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Road infrastructure in appropriate conditions is a requirement for the development of any country. The formulation of policies oriented to preserve road networks responds to political, socio-economic, and environmental interests. Through a hybrid methodology that integrates system dynamics (SD) and analytic hierarchical process (AHP) approaches, this paper compares some strategies employed in the development of sustainable road maintenance policies in Colombia. Using a hypothetical case study of a national road network, a set of maintenance policy alternatives are evaluated through the SD model in order to analyze the evolution of road conditions, and quantify costs and emissions. Then, a multi-criteria evaluation is performed applying the AHP methodology. Results show that in the Colombian context, decision-making processes regarding maintenance policies are highly influenced by economic factors, which lead to short-term strategies such as performing corrective maintenance over predictive maintenance. However, further analysis demonstrates that predictive maintenance allows the road network to remain in good conditions. Simultaneously, roadways in adequate conditions contribute to mitigate the environmental impact, because CO2 emissions are directly related to the interventions performed to preserve these roads. The proposed methodology can be used as a support tool to formulate maintenance policies that consider the long-term effects at the technical, environmental, and economic levels.

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Section: Introductionmentioning

confidence: 99%

Sustainable Decision-Making in Road Development: Analysis of Road Preservation Policies

Ruiz

Guevara

2020

Sustainability

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“…Their maintenance and rehabilitation are significantly impactful processes in an environmental, economic, and social context. In order to minimize the impacts of these processes and move towards a more sustainable and circular approach, recycling of RA is nowadays a widespread practice within the road engineering industry [22][23][24][25][26][27]. The annual average quantity of available RA within Europe reaches approximately 45.5 Megatonnes, while the average annual proportion that is actually being utilized in asphalt production is only 23.2 Megatonnes [28][29][30][31][32][33][34][35][36][37][38][39].…”

Section: Introductionmentioning

confidence: 99%

“…The annual average quantity of available RA within Europe reaches approximately 45.5 Megatonnes, while the average annual proportion that is actually being utilized in asphalt production is only 23.2 Megatonnes [28][29][30][31][32][33][34][35][36][37][38][39]. The main techniques with which RA can be utilized are in hot in-plant recycling, hot in-place recycling, full depth reclamation, cold in-plant recycling, and cold in-place recycling [23,40]. The percentage of RA incorporated in road pavements is usually limited between 10% and 30%, despite the advantages that its use might imply.…”

Section: Introductionmentioning

confidence: 99%

The Sustainability of Reclaimed Asphalt as a Resource for Road Pavement Management through a Circular Economic Model

Mantalovas

Mino

2019

Sustainability

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The transition of the road engineering industry to a circular way of doing business requires more efficient and sustainable resources, energy, and waste management. The rates in which reclaimed asphalt is being recycled or reused in the asphalt mixture production process constitutes a crucial parameter in this transition. This paper aims at establishing a further step towards the combined circularity and sustainability of asphalt pavements, by introducing a framework for quantifying their Material Circularity Index. The framework is based on the methodology proposed by the Ellen MacArthur Foundation and accordingly tailored for the context of asphalt pavements. This study, thus, attempts to provide a thorough analysis of the Reclaimed Asphalt’s recycling rates and trends on a European scale and to identify whether the efficiency of the current recycling practices is adequate or not. Moreover, a case study has been undertaken in order to quantify the Material Circularity index of the asphalt pavements forming Italy’s motorway network, following the proposed framework. For representative and accuracy reasons, the Material Circularity index of wearing, binder, and base courses has been calculated separately, and the results interestingly indicate that the base course exhibits the highest rates of circularity.

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“…The low initial stiffness in the CIR layer could lead to great difficulties to lay and compact a hot mix asphalt overlay, as machinery can overload it. Also, immediately after it has been opened to heavy traffic, significant permanent deformation and failure may occur, creating an irreversible negative effect on the structural and functional state of the CIR layer (Pérez et al 2016, Tabaković et al 2016, National Academies of Sciences, Engineering, and Medicine 2017, Nivedya and Veeraragavan 2017, Pinto and Buss 2018, Roos 2018, Wang et al 2018.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of curing properties of cold in-place recycling asphalt mixtures by induction heating

Pérez

Gómez-Meijide

Pasandín

et al. 2019

International Journal of Pavement Engineering

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In this study, samples of cold in-place recycling mix (CIR) with steel fibres were manufactured and heated by electromagnetic induction. Heating was conducted to accelerate the curing process and make the CIR mixtures more competitive against other less-sustainable road materials. Heating can also be applied after years of service life to reduce the viscosity of the binder and make it flow through cracks, healing damage. Cylindrical Marshall samples were heated by induction for different durations immediately after production and their mechanical performance was assessed over different curing periods. In addition, 3-point bending healing tests were carried out on cured semicircular samples. The results showed that the remaining water content in samples heated for 180 s was lower than in control samples (not heated) after 21 days. The Marshall stability and flow after compaction increased by 147% and 144%, respectively, when heating was applied for 240 s. Healing tests produced encouraging results with strength recoveries higher than 50%.

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Cold recycling of reclaimed asphalt pavement towards improved engineering performance

Cited by 85 publications

References 10 publications

Sustainable Decision-Making in Road Development: Analysis of Road Preservation Policies

Sustainable Decision-Making in Road Development: Analysis of Road Preservation Policies

The Sustainability of Reclaimed Asphalt as a Resource for Road Pavement Management through a Circular Economic Model

Enhancement of curing properties of cold in-place recycling asphalt mixtures by induction heating

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