Storage stability and rheological properties of asphalt modified with waste packaging polyethylene and organic montmorillonite

Yu, Ruien; Fang, Changqing; Liu, Pei; Liu, Xiaolong; Li, Yan

doi:10.1016/j.clay.2014.11.033

Cited by 95 publications

(32 citation statements)

References 27 publications

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“…However, the majority of the published studies have preferred the use of Sustainability 2019, 11, 646 3 of 20 the wet process [11,16,17], as it leads to a larger degree of modification of the binder and; therefore, to a better use of the reclaimed polymers (RP) to improve its properties. Nonetheless, if the reclaimed polymer modified binder (RPMB) produced by the wet process is stored at high temperatures without agitation, some phase separation could appear, resulting in heterogeneous bitumen that cannot be used for the manufacture of bituminous mixtures [18,19]. Whilst the use of bitumen tanks equipped with agitation systems or stabilizing agents could avoid storage problems, they increase the final manufacturing costs of the mixture and could limit the use of the wet process [20,21].…”

Section: Introductionmentioning

confidence: 99%

Reclaimed Polymers as Asphalt Binder Modifiers for More Sustainable Roads: A Review

et al. 2019

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The use of polymer-modified binders in asphalt mixtures has become more widespread due to their reduced thermal susceptibility and improved rutting and fatigue resistance. Nevertheless, their high cost limits their application, thus making the use of reclaimed polymers (RP) an interesting alternative for both reducing price and extending the service life of pavements. This paper; therefore, presents a comparative review of the recycled polymers most commonly studied as bitumen modifiers: polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), ethyl vinyl acetate (EVA), and ground tire rubber (GTR), in order to facilitate their selection and extend the use of the bitumen. The differences in terms of melting point, mixing conditions, and maximum quantity of added polymer are analyzed. Moreover, their effect on the mechanical behavior of the asphalt binders and their stability with and without the use of additives is presented. According to the literature revision, the performance of the new binder is more influenced by the kind of polymer that was incorporated and the mixing conditions than by the base bitumen that was chosen, although rheological evaluation is needed to fully understand the modification mechanisms of the modified binder. In general terms, plastomers have a stronger effect in terms of increasing the stiffness of the bitumen in comparison with crumb rubber (elastomers), thus providing an improved rutting resistance. The joint use of polyethylene (plastomer) and crumb rubber (elastomer) can be an interesting option for its recycling potential and mechanical performance, although further study is needed to achieve stable bitumen across the entire range of temperatures; additives, such as maleic anhydride (MA), are commonly employed to improve the stability of the binder and enhance its characteristics, but their use could limit the economic benefits of using recycled materials.

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Section: Introductionmentioning

confidence: 99%

Reclaimed Polymers as Asphalt Binder Modifiers for More Sustainable Roads: A Review

et al. 2019

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“…For polymers different from SBS, there are only a few papers available. In the case of polyolefins, like polyethylene and polypropylene the ternary mixes were prepared, but their aging resistance was not evaluated [99][100][101][102][103]. This is not surprising since polyolefins are not compatible with bitumens and the binders show storage instability and low performances.…”

Section: The Bitumen-polymer-layered Silicate Ternary (Bpls)mentioning

confidence: 99%

Effect of Nanoadditives on Bitumen Aging Resistance: A Critical Review

Filippi

Cappello

Mercé

et al. 2018

Journal of Nanomaterials

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Starting from the eighties, the use of nanoadditives registered an increasing attention in the scientific and patent literature, especially for the case of polymeric nanocomposites. In the last decade, this involved bituminous materials, modified either with nanosized fillers or with polymeric nanocomposites. One of the expected benefits is an increased resistance of the binder to aging. After a short introduction underlining the uncertainties and risks of artefacts in aging tests, a review is given, focusing on the antiaging properties of layered silicates, which are by far the most important nanoadditives for bitumens. Together with layered silicates, other materials such as nanohydrated lime, nanosilica, and layered double hydroxides are mentioned. Preparation and characterization of the binary bitumen/layered silicate and ternary bitumen/layered silicate/polymer systems are described in order to individuate the aspects that influence the antiaging effect. Even if the available literature is quite abundant and unanimously confirms that nanoadditives may improve bitumen durability, there is a lack of studies clarifying the involved mechanisms. As it is for conventional fillers, it seems to be a combination of physical and chemical interactions. Nanoadditives with different chemistries, porosities, and interlayer spacings differently absorb the polar components from the bitumen, thus affecting their predisposition to oxidative aging.

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“…O aumento da viscosidade e a instabilidade à estocagem são tipos comuns de mudanças que são observadas em ligantes modificados por polímeros e que não são desejáveis. Maior viscosidade faz com que o ligante necessite de maior energia no processamento de sua mistura e compactação, enquanto que a separação de fases impossibilita a estocagem em elevadas temperaturas [9,14].…”

Section: Introductionunclassified

“…Com o advento do uso de nanoargilas em modificações asfálticas, tem-se estudado a aplicação de algumas argilas como mecanismo de redução na separação de fases de asfaltos modificados [8,11]. Estudos feitos por [14] demonstraram que há aumento da estabilidade à estocagem quando utilizado asfalto modificado com resíduos de embalagens de polietileno adicionando-se argila bentonítica modificada em pequenos teores.…”

Section: Introductionunclassified

Estabilidade e adesividade de ligante asfalto modificado com blenda de borra oleosa de petróleo com borracha de pneu

et al. 2018

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RESUMO O revestimento asfáltico de pavimento rodoviário tem por função reduzir as tensões impostas pelo tráfego e oferecer conforto e segurança aos usuários. Dessa forma, estudos para inibir intervenções corretivas em curto prazo e aumentar a sua vida útil são de interesse dos órgãos responsáveis pela sua manutenção. As modificações dos ligantes asfálticos ganha importância neste contexto, tendo em vista conferir maior durabilidade ao revestimento, contudo, fatores como a separação de fases nos ligantes modificados, limitam a modificação em escala industrial. O objetivo deste estudo foi avaliar a estabilidade físico-química e a adesividade do CAP 50/70 modificado com blenda de borra oleosa de petróleo e borracha de pneus, na proporção 85/15% m/m (M1), na presença dos aditivos NPA - Neutro Pesado Aromático e argilas bentonita e caulinita. Para tanto, ensaios de estabilidade de estocagem foram realizados com os ligantes modificados, por medida de viscosi-dade, a de adesividade conforme a norma 078/98 do DNER. Os resultados mostraram que a adição de 1% m/m de NPA aumenta a estabilidade de estocagem do ligante modificado por M1 e melhora a sua adesividade ao agregado.

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Storage stability and rheological properties of asphalt modified with waste packaging polyethylene and organic montmorillonite

Cited by 95 publications

References 27 publications

Reclaimed Polymers as Asphalt Binder Modifiers for More Sustainable Roads: A Review

Reclaimed Polymers as Asphalt Binder Modifiers for More Sustainable Roads: A Review

Effect of Nanoadditives on Bitumen Aging Resistance: A Critical Review

Estabilidade e adesividade de ligante asfalto modificado com blenda de borra oleosa de petróleo com borracha de pneu

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