Evaluation of asphalt mixtures modified with polymer and wax

Azam, Abdelhalim; El-Badawy, Sherif M.; Alabasse, Rufak M.

doi:10.1007/s41062-019-0230-3

Cited by 23 publications

(14 citation statements)

References 13 publications

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“…[41] A study comparing waste HDPE and PP found that the former had 10% ITS improvement and 17% TSR improvement at 4 wt% addition with none and 8% for the latter with 3 wt% addition, respectively. [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.…”

Section: Itstsrmentioning

confidence: 94%

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: 94%

Waste plastics in asphalt concrete: A review

Grady

2021

SPE Polymers

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“…It is also suitable to reprocess polymers that are difficult to recycle or even non-recyclable, including polypropylene (PP), polystyrene (PS) mixtures, and others. Consequently, different waxes that can be mixed with bituminous binders are available, namely those produced from waste plastic bags [15], PEX waste [6,16,17], PE waste [18], HDPE or low-density polyethylene (LDPE) [19], as well as Fischer-Tropsch wax (FTW) [20] (currently with some limitations because this process is essentially carried out using coal). Some authors [9] also highlighted the need to reduce biodiesels' percentage of waxes to avoid the filters' clog.…”

Section: Introductionmentioning

confidence: 99%

Using Plastic Waste in a Circular Economy Approach to Improve the Properties of Bituminous Binders

et al. 2022

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This work aims to use wax to modify a binder employed in the paving industry. This wax can be obtained either directly or as a by-product from plastic waste′s thermal cracking (pyrolysis). The study characterizes this sustainable material and the binders resulting from blending it with conventional or modified bitumen with other additives applied in the manufacture of bituminous mixtures. Different tests were used: thermogravimetric and spectroscopic analysis; consistency tests; testing of dynamic viscosity at various temperatures; and assessment of the rheologic properties of binders. As a result, several crucial findings were reached: this sustainable wax promotes changes in the viscosity of the binders, their handling temperatures can be reduced, and it contributes to some goals of the U.N. 2030 Agenda. In summary, this work allowed us to conclude that the positive effects of a suitable modification of the bituminous binders, which incorporated this wax and other additives, led to improved consistency and rheological behaviour, having provided, for example, lower temperature susceptibility and higher permanent deformation resistance.

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“…The effect of the wax depends on the chemical composition and rheological properties of the asphalt binder, the crystallinity of the wax, the range of applied temperature, and the amount of wax [29]. Utilizing polymers modified asphalt (PMA) for roadway construction has earned remarkable attention due to their superior performance, including thermal-crack resistance, moisture susceptibility, and rutting resistance [30][31][32][33][34][35][36]. However, polymer-modified asphalt mixtures require high mixing and compacting temperatures, increasing energy consumption and exhaust emissions [37].…”

Section: Introductionmentioning

confidence: 99%

Performance Investigation of Hot- And Warm- Asphalt Mixtures Modified With Superplast

Moussa

Sallam²,

Younis

2021

JES. Journal of Engineering Sciences

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Moisture and stripping damages are the most prevalent cause of defects of both Hot-Mix Asphalt (HMA) and Warm-Mix Asphalt (WMA). Adhesion between aggregates and bitumen is a crucial factor that affects such defects. Various methods, such as incorporating additives, have strengthened the asphalt mixture's resistance to moisture and stripping. This paper aimed to experimentally investigate the effect of including a low-cost polymer additive (Superplast) into HMA and WMA mixtures. For this goal, a 60/70 penetration grade bitumen was used. For preparing the WMA mixtures, Showax was employed with percentages of 2, 3, 4, 5, and 6% by weight of bitumen. Polymer modified mixtures (HMA and WMA) were prepared by adding 3%, 4, and 5% 680 Ghada S. Moussa et al., Performance Investigation of Hot-And Warm-Asphalt Mixtures ……….of Superplast by weight of the binder. Performance characterizations of the unmodified and Superplast-modified mixtures include stiffness, moisture damage resistance, and bonding. These characteristics were evaluated via Marshall, Lottman, and Double Punching tests, respectively. Results revealed that incorporating Superplast improved the adhesion between bitumen and aggregates, which ultimately led to an increase in the stiffness and moisture resistance of both HMA and WMA. Moreover, Superplast-modified WMA mixtures exhibited the best moisture and stripping resistance performance compared to Superplast-modified HMA and other unmodified mixtures.

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Evaluation of asphalt mixtures modified with polymer and wax

Cited by 23 publications

References 13 publications

Waste plastics in asphalt concrete: A review

Waste plastics in asphalt concrete: A review

Using Plastic Waste in a Circular Economy Approach to Improve the Properties of Bituminous Binders

Performance Investigation of Hot- And Warm- Asphalt Mixtures Modified With Superplast

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