Recycling of road materials into new unbound road layers – main practice in selected European countries

Thøgersen, Finn; Grégoire, Colette; Stryk, Josef; Huard, Pierre; Descantes, Yannick; Chazallon, Cyrille; Blasl, A; Broere, Peter; Bizjak, Karmen Fifer; Hellman, Fredrik; Arm, Maria

doi:10.1080/14680629.2013.794369

Cited by 14 publications

(6 citation statements)

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“…Most researchers have confirmed that this material can be used, in an appropriate proportion, as a suitable replacement for natural aggregate. The quality requirements applied for recycled asphalt and natural aggregate mixtures are similar to those applied for natural aggregate [7]. Although the use of recycled asphalt in unbound base courses is considered inferior when compared to its use in asphalt courses, this method of using recycled asphalt has nevertheless gained in popularity because it is a material recovery technique, and because of its favourable environmental effects (conservation of natural resources, minimisation of waste), and economic benefits.…”

Section: Introductionmentioning

confidence: 91%

Svojstva mješavina za izradu nevezanih nosivih slojeva s dodatkom recikliranog asfalta

2016

JCE

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The possibility of using recycled asphalt as replacement for natural aggregate in unbound base course mixes is explored in the paper. The mixes in which a certain proportion of natural aggregate (limestone, gravel) was replaced with recycled asphalt were analysed. The testing program involved analysis of the grading, compaction parameters, physicomechanical properties and bearing capacity of mixes. The results show that recycled asphalt can be used, in some proportions, as a suitable replacement for natural aggregate.

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Section: Introductionmentioning

confidence: 91%

Svojstva mješavina za izradu nevezanih nosivih slojeva s dodatkom recikliranog asfalta

2016

JCE

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“…Efforts are being made to maximize the quantity of RAP in the recycled mix, without compromising with the engineering property of the mix (Oliveira et al 2013). RAP also has been used as replacement of aggregates in base/sub-base layers (Han 1993;Thøgersen et al 2013;Wen and Wu 2011). Researches have conducted studies using RAP in cement concrete (Huang et al 2005) as well.…”

Section: Asphalt Recyclingmentioning

confidence: 99%

“…Studies show that RCA (or, reclaimed aggregate material (RAM), in generic terms) can be used as substitute for natural coarse aggregates in sub-base and base layers of pavement in bound (Ebrahimi et al 2012;Gabr and Cameron 2012) or unbound form (Hansen 1992;Sherwood 1995;González and Martínez 2008;Thøgersen et al 2013). …”

Section: Reclaimed Aggregate Materialsmentioning

confidence: 99%

Reclaimed Waste Materials in Sustainable Pavement Construction

Das

Swamy

2014

Climate Change, Energy, Sustainability and Pavements

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This chapter provides an in-depth but brief overview on the possible use of various waste materials for sustainable pavement construction. It compiles a literature review on the research done on such materials and highlights the current issues. IntroductionPavement construction involves consumption of large quantity of construction materials. Some of these construction materials are available in natural form and some are manufactured (from naturally occurring raw materials). Due to the rapid growth of infrastructure, naturally available good quality construction materials are gradually becoming scarce. Consequently, there is an increase in the transportation cost for acquiring good quality materials. Thus, there is a need to develop or search for alternative materials for road construction.On the other hand, large quantity of byproducts are generated from agricultural, construction and demolition, industrial and domestic sources (Aravind and Das

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“…Utilizing waste or by-product materials in asphalt pavements for functional, environmental, or economic benefits has been long studied and encouraged. Some recycled materials such as recycled asphalt pavement (RAP) and recycled asphalt shingle (RAS) are so commonly used in asphalt mixtures that have gained a standard asphalt mixture component status that their use is not being questioned [1]. Various types of relatively unconventional or less common waste, by-product, or otherwise recycled materials such as waste tire thread mesh, recycled waste lime, municipal solid waste incineration ash, waste foundry sand, recycled carbon fiber, and different metallic waste/by-product metallic materials have been used to modify asphalt-based composites for different purposes [2][3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Zinc Slag as a Partial or Total Replacement for Mineral Filler in Warm Mix Asphalt and Its Effects on Self-Healing Capacity and Performance Characteristics

et al. 2022

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Utilizing the self-healing properties of asphalt materials is a way to improve the service life of asphalt pavements. Enhanced self-healing capabilities can be achieved through mixture modification. Using waste or by-product materials to modify asphalt mixtures can provide further environmental benefits. However, with a given mixture modification method, the resulting materials should be adequately vetted to ensure that enhanced self-healing capability is not attained at the expense of the mixture’s overall performance. This research aims to investigate the feasibility of using zinc slag filler to enhance the self-healing properties of warm mix asphalt (WMA) and evaluates the rutting susceptibility and moisture-resistance of the slag-modified mixtures. To this end, zinc slag filler was used to replace a portion of the mineral filler at different replacement rates in WMA mixtures. Self-healing capabilities of the resulting mixtures were studied under microwave induction heating. The influence of zinc slag modification on asphalt mixture’s characteristics and conventional performance indicators were evaluated by the Texas boiling test, the three-point bending test, and the Kim test (a deformation test). Also, the adhesion between bitumen and aggregate was evaluated using the broken sample from the three-point bending test and digital image analysis. The results of self-healing tests demonstrated that the heat generation capability of the specimens increased with filler replacement rate, such that the specimens with 100% of the mineral filler replaced with slag showed the highest heating performance. Zinc slag filler showed the potential to improve the moisture resistance of WMA by enhancing aggregate–bitumen adhesion and thus reducing stripping. The slag-modified WMA samples exhibited better tensile strength ratio (TSR) and deformation resistance than their non-modified equivalents.

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Recycling of road materials into new unbound road layers – main practice in selected European countries

Cited by 14 publications

References 1 publication

Svojstva mješavina za izradu nevezanih nosivih slojeva s dodatkom recikliranog asfalta

Svojstva mješavina za izradu nevezanih nosivih slojeva s dodatkom recikliranog asfalta

Reclaimed Waste Materials in Sustainable Pavement Construction

Zinc Slag as a Partial or Total Replacement for Mineral Filler in Warm Mix Asphalt and Its Effects on Self-Healing Capacity and Performance Characteristics

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