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

Farooq, Mohammad Adnan; Mir, Mohammad Shafi

doi:10.1007/s41062-017-0058-7

Cited by 49 publications

(20 citation statements)

References 46 publications

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“…However, concerns with regards to its heterogeneity and intrinsic properties hinder its incorporation in high contents, particularly in the wearing course mixtures. This issue may be addressed by coupling RA with recycling agents and WMA technologies (Farooq & Mir, 2017;Subhy et al, 2019). Moreover, electric arc furnace steel slag, one of the main by-products of the metallurgical industry, has been utilised in the last decades as a substitute for coarse aggregates in asphalt mixtures.…”

Section: Introductionmentioning

confidence: 99%

Environmental assessment of warm mix asphalt incorporating steel slag and high reclaimed asphalt for wearing courses: a case study

Georgiou

Loizos

2021

Road Materials and Pavement Design

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This study quantifies the potential environmental benefits associated with the incorporation of industrial by-products and recycled materials combined with warm mix asphalt (WMA) additives in wearing course mixtures for asphalt pavement construction. An electric arc furnace (EAF) steel slagbased mix and three recycled mixtures incorporating steel slag and fractionated reclaimed asphalt (RA) of varying contents (i.e. 25, 40, and 50%) were analyzed comparatively to reference hot mix asphalt (HMA) using the 'cradle-to-gate' approach. The results of this study indicated that the warm asphalt mixture incorporating steel slag and 50% RA is the most environmentally friendly alternative. The greatest environmental benefits result from the combined use of steel slag and reclaimed asphalt, which is attributed to lesser demands for raw material extraction, bitumen production, and resource supply. On the contrary, the contribution of lowering mixtures' production temperature by 30°C is minimal.

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Section: Introductionmentioning

confidence: 99%

Environmental assessment of warm mix asphalt incorporating steel slag and high reclaimed asphalt for wearing courses: a case study

Georgiou

Loizos

2021

Road Materials and Pavement Design

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“…Currently, due to the continuous development of highway construction, a large amount of old asphalt mixture are produced in the process of new road construction, remodeling, or the demolition of road structures, which aggravates the impact of solid waste on the global environment [ 1 – 5 ]. In the past few years, reclaimed asphalt pavement (RAP) has attracted comprehensive attention owing to its advantage of supporting a green economy [ 6 – 8 ].…”

Section: Introductionmentioning

confidence: 99%

Feasibility study on recycled vegetable oil waste and recycled polyethylene for the modification of aged asphalt

Zou

Tian

et al. 2021

PLoS ONE

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The application of reclaimed asphalt pavement has been widely encouraged due to its significant economic and environmental benefits. However, it is necessary to add rejuvenators to ensure its performance. Currently, bio-oil-based regenerants have attracted attention owing to their advantages of renewability and cost savings. The purpose of this paper is to study the use of recycled vegetable oil waste (R-oil) and recycled polyethylene particles for the regeneration and modification of aged asphalt. Physical, rheological, and chemical tests were used to figure out their influence on the pavement performance of aged asphalt. According to the physical test indices (penetration, softening point, and ductility), the performance of the rejuvenated asphalt was better than that of virgin asphalt. The workability and low-temperature performance of the rejuvenated asphalt were basically the same as those of virgin asphalt, and its fatigue and high-temperature performance were better. Infrared spectroscopy showed that R-oil diluted the high-polarity sulfoxide base of aged asphalt. Gel permeation chromatography showed that its molecular weight dispersion was better than that of aged asphalt. Therefore, R-oil and polyethylene can improve the pavement performance and chemical properties of aged asphalt.

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“…In the last decades, relevant attention to these issues and environment preservation has remarkably risen. In this regard, numerous researchers have investigated and analyzed the possible sustainability issues caused by traditional approaches and technologies in pavement construction and maintenance phases, and proposed modern and more efficient sustainable solutions that may effectively reduce consumption of energy and resources, as well as the production of waste [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Impact Analysis Using Life Cycle Assessment of Asphalt Production from Primary Data

et al. 2020

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Road construction and maintenance have a great impact on the environment, owing to the huge volumes of resources involved. Consequently, current production procedures and technologies must be properly investigated, for identifying and quantifying the life cycle environmental impacts produced. In this paper, primary data, i.e., site-specific data directly collected or measured on a reference plant, are analyzed for calculating the impact of the production of a hot mix asphalt. The analysis is performed in a from “cradle to gate” approach to estimate the environmental burdens of the production process in an average plant, representative of the existing technology in Italy and Southern Europe. The research outcomes are useful to increase reliability in quantification of asphalt production impacts and the contribution of each component. The results represent a reference basis for producers, designers, and contractors in the decisional phases, identifying the most critical aspects in the current practice and the possible improvements for reducing impacts of road industries. In this regard, efficient energy technologies for reducing the production temperature (such as warm mix asphalt) and burned fuels are proven to assure relevant improvements in the environmental performance.

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

Cited by 49 publications

References 46 publications

Environmental assessment of warm mix asphalt incorporating steel slag and high reclaimed asphalt for wearing courses: a case study

Environmental assessment of warm mix asphalt incorporating steel slag and high reclaimed asphalt for wearing courses: a case study

Feasibility study on recycled vegetable oil waste and recycled polyethylene for the modification of aged asphalt

Impact Analysis Using Life Cycle Assessment of Asphalt Production from Primary Data

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