Performance of AC mixtures containing flakes of LDPE plastic film collected from urban waste considering ageing

Almeida, A.; Capitão, Silvino; Bandeira, Rita; Fonseca, Mariana; Picado-Santos, Luís

doi:10.1016/j.conbuildmat.2019.117253

Cited by 39 publications

(23 citation statements)

References 38 publications

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“…[42] In another case, ITS improved by 15% with 6% waste LDPE film addition while the TSR dropped from slightly over 100% to 85%. [43] In another case, ITS did not improve at 2 wt% for both HDPE and PP and improved by 20% at 5 wt% polymer content. [44] Usually, the addition of plastic causes a rise in ITS up to a certain amount, at which point the ITS begins to decrease.…”

Section: Itstsrmentioning

confidence: 92%

“…[73] 6 wt% waste LDPE plastic dropped the number of cycles by 33% on both aged and unaged samples. [43] The addition of 0.5% waste LDPE improved fatigue resistance by 25% with limestone aggregate in one case, while in the other with porphyry aggregate the fatigue resistance dropped by a factor of 3. [31] The fatigue life dropped by about 50% over a range of initial strains for 2.5 wt% waste PE from bags at 20, 30, and 40 C. [74] In one study, the fatigue life was a few percent higher with the addition of 2 and 5 wt% PP and HDPE.…”

Section: Fatigue Testsmentioning

confidence: 96%

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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: 92%

Section: Fatigue Testsmentioning

confidence: 96%

Waste plastics in asphalt concrete: A review

Grady

2021

SPE Polymers

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“…The flakes of LDPE were the same as used in a previous study [26], with a melting point from 100 to 125 • C and size between 2 and 100 mm (thickness up to 0.1 mm). They were collected from urban waste and processed in a plastic recycling plant.…”

Section: Raw Materials: Rap Aggregates Wco Virgin Bitumen and Ldpementioning

confidence: 99%

“…Moreover, the authors have already done some work in using flakes of LDPE collected from urban waste [26], with promising results in terms of permanent deformation resistance of asphalt concrete. That paper also summarized some issues related to the availability of plastic waste and its inadequate deposition in nature as well as the need of increasing its recycling level in order to reduce the environmental damage.…”

Section: Introductionmentioning

confidence: 99%

Full Recycling of Asphalt Concrete with Waste Cooking Oil as Rejuvenator and LDPE from Urban Waste as Binder Modifier

et al. 2020

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Some research projects have studied full recycling of reclaimed asphalt pavement (RAP). Several additives have been used to rejuvenate the RAP’s aged bitumen. The authors previously studied full recycling of RAP rejuvenated with waste cooking oil (WCO). The asphalt concrete (AC) manufactured revealed good mechanical behaviour except for rutting resistance. Therefore, they decided to also include in the asphalt mixtures low density polyethylene (LDPE) from urban waste as a low-cost polymer to improve that weak point and verify if this technique was feasible and with potential as a pavement material. A laboratory plan was conceived to evaluate the mechanical performance of two rejuvenated ACs with WCO and LDPE. Stiffness, water sensitivity, resistance to rutting and fatigue cracking were evaluated. The results showed that, despite some empirical parameters usually indicated in current specifications not being met, the performance of the studied asphalt mixtures was adequate and, thus, there are good expectations about the future use of these solutions in real pavements, particularly for low and intermediate traffic levels. Based on a global analysis of the performance observed, the main conclusion was that full recycling of AC with WCO and LDPE is feasible, and the score obtained was higher than that of a conventional AC used for comparison.

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“…The extensive research carried out across the globe on warm mix asphalt containing reclaimed asphalt pavement material shows that the performance of mixture can vary with WMA technology type [16][17][18][19][20]; RA content [42]; production temperature [43], and laboratory conditioning [34,44,45]. It becomes important to evaluate the performance of WMA mixtures on a case-to-case basis.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Warm Asphalt Mixtures Containing Chemical Additive and Effect of Incorporating High Reclaimed Asphalt Content

2021

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Reclaimed asphalt (RA) and Warm mix asphalt (WMA) are two widely used environmentally friendly mixtures in the paving industry. This study compares the laboratory performance of conventional hot mix asphalt (HMA) with virgin WMA, and WMA containing 60% RA content, using thermal stress restrained specimen test, wheel tracking test, and indirect tensile strength test. Based on test results, a reduction of 15 °C in mixing temperature was achieved for WMA mixtures compared to HMA using the given chemical additive. The virgin WMA mixture showed superior cracking resistance but lower rutting resistance than HMA, and incorporation of RA material without any further modification in the binder, deteriorated both cracking and rutting performance of WMA. It was also shown that laboratory short-term aging can significantly affect the performance of the mixtures.

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Performance of AC mixtures containing flakes of LDPE plastic film collected from urban waste considering ageing

Cited by 39 publications

References 38 publications

Waste plastics in asphalt concrete: A review

Waste plastics in asphalt concrete: A review

Full Recycling of Asphalt Concrete with Waste Cooking Oil as Rejuvenator and LDPE from Urban Waste as Binder Modifier

Performance Evaluation of Warm Asphalt Mixtures Containing Chemical Additive and Effect of Incorporating High Reclaimed Asphalt Content

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