Performance of Bituminous Mixes Containing Treated Recycled Concrete Aggregates and Modified by Waste Polyethylene

Giri, Jyoti Prakash; Panda, Mahabir; Sahoo, Umesh Chandra

doi:10.1061/(asce)mt.1943-5533.0002384

Cited by 20 publications

(8 citation statements)

References 13 publications

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“…[50] In one case, the ITS was less for samples with a few percent added waste HDPE at low temperatures (5-20 C) while being higher at higher temperatures; the TSR at room temperature increased a few percent with added HDPE. [51] Similar behavior for the ITS was found for PP-filled samples where the crossover temperature was 48 C. [52] A very interesting study [53] found that coating aggregate with polypropylene (heating the aggregate at 230 C and then slowly adding crushed polypropylene to aggregate that is being mixed) does improve performance significantly of the asphalt concrete as shown in Figure 5. The concrete was mixed at 166 C so in all cases the PP should melt.…”

Section: Itstsrmentioning

confidence: 54%

“…[30] The reduction was much smaller but in the same direction for another study using waste HDPE at similar loading levels. [51] A study with LDPE found a reduction from 15.7 mm to 3.4 mm with the addition of 3 wt% polymer; increases to 6 and 9 wt% gave smaller improvements. [68] Large reductions were also found for waste polyethylene film and LDPE.…”

Section: Ruttingmentioning

confidence: 98%

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Waste plastics in asphalt concrete: A review

Grady

2021

SPE Polymers

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Among possible applications for post-consumer waste plastics, one criterion is that the application should be able to use very large amounts of material because the amount of plastic waste is so large. Another key issue is economics; very little cost should be involved in preparing waste plastics for a specific application. One of the few applications for post-consumer waste plastics that could possibly meet both requirements is filler in asphalt concrete. Specifically, if waste plastics in asphalt concrete were 10 wt%, then this application alone could use all plastic waste currently being produced in the world. This review examines the progress that has been made to incorporate waste plastics into asphalt concrete and identifies key issues preventing this technology from being applied commercially.

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Section: Itstsrmentioning

confidence: 54%

Section: Ruttingmentioning

confidence: 98%

Waste plastics in asphalt concrete: A review

Grady

2021

SPE Polymers

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“…PE, which is the topic of this study, can be used in asphalt mixtures using the wet process where it is added to the binder before being added to the mixture, or the dry process where it is added directly to the aggregates. Using the dry and the wet processes, better rutting resistance [ 4 , 5 , 6 ], improved moisture resistance [ 7 , 8 ], stiffness and fatigue have been reported [ 5 , 7 , 9 ] while some issues regarding low-temperature properties due to increased brittleness have been observed [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

Dry Addition of Recycled Waste Polyethylene in Asphalt Mixtures: A Laboratory Study

et al. 2022

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The circular use of resources (i.e., reuse and recycling of materials) aiming for zero waste is also gaining increasing attention in pavement engineering. In this regard, the possible use of waste plastics in asphalt materials is of strategic importance since a considerable amount of plastic waste from construction and demolition waste and municipal solid waste is generated every year. Given this background, this experimental study aimed to investigate the feasibility of recycling waste polyethylene (PE) into asphalt mixtures. For this purpose, the dry addition of plastic shreds was evaluated to overcome the drawbacks observed in a previous interlaboratory research on PE-modified bituminous binder (i.e., instability/inhomogeneity of blend as well as the need for PE grinding). A comparative laboratory study was carried out on dense graded asphalt mixtures containing different amounts of waste plastics (i.e., 0%, 0.25%, and 1.5% by weight of the mixture). The selected asphalt mixes were investigated in terms of workability, linear visco-elastic characteristics, stiffness, strength, resistance to permanent deformation, and moisture sensitivity. Overall, the experimental findings show that the mixes prepared with the dry addition of plastic wastes were able to guarantee almost the same workability and moisture resistance as the reference material while leading to enhanced performance in terms of stiffness and permanent deformation resistance, with better responses for the higher investigated PE dosage.

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“…In order to achieve these goals different researchers have focused on improving asphalt production technologies [2] or adding materials that can significantly improve asphalt binder performance [3], aiming also to increase sustainability of the production and construction processes [4]. Consequently, interesting studies and applications aimed to evalu-ate the performance of asphalt mixtures containing, for example, reclaimed asphalt materials [5,6], tire rubber [7][8][9][10], glass waste [11], or plastic materials [12][13][14][15][16][17] and other additives [18]. Among these solutions, the addition of polymeric materials may be very efficient.…”

Section: Introductionmentioning

confidence: 99%