Experimental study on the optimisation of chemical treatment to reduce waste rubber aggregates absorption properties

Ateeq, Muhammad; Al-Shamma’a, Ahmed

doi:10.1016/j.conbuildmat.2016.09.021

Cited by 7 publications

(3 citation statements)

References 24 publications

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“…Bitumen samples were analyzed in their pure form, cured and un‐cured form, extracted from the rubber–bitumen mixes with and without a treated rubber. Microwave analysis technique has been successfully used in previous studies carried out by the same author to show its effectiveness in assessing the properties of bitumen with and without its interaction with rubber. It showed promising results in terms of its accuracy, repeatability, and validity, and hence used in this study.…”

Section: Resultsmentioning

confidence: 99%

Experimental study on the microwave processing of waste tyre rubber aggregates to enhance their surface properties for their use in rubberized bituminous mixtures

Ateeq

Al-Shamma’a

2017

Micro & Optical Tech Letters

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This experimental study uses the microwave technology to process the waste tyre rubber aggregates to enhance the interaction properties of waste rubber and bitumen by smoothing its surface. This was to make the waste rubber less reactive to the bitumen sample at the elevated temperatures of around 140-1708C. Parameters such as the microwave power, the height of the sample inside the processing chamber, and the processing time have been considered and optimized. The results show that the microwave processing technique designed in this study has significantly smoothened the surface of waste rubber. Scanning electron microscope surface analysis has been carried out to confirm the changes and smoothness of the rubber surface in comparison with the untreated waste rubber aggregates. In addition, microwave spectroscopy analysis has been carried out to confirm the reduction in the absorption properties of waste rubber. The microwave curves of the bitumen samples extracted from the treated rubber-bitumen blend are comparable with the pure bitumen sample with minute shifts in the resonant peaks. The results show the potential of the technique and recommends designing a dedicated processing unit to further improve it through parameters such as volumetric and uniform surface treatment, penetration depth of the microwaves. K E Y W O R D S microwave analysis, microwave processing, microwave spectroscopy, robust processing, rubber absorption properties, surface properties, waste rubber aggregates Microw. Opt. Technol. Lett. 2017;2951-3205 wileyonlinelibrary.com/journal/mop Abstract This article presents a thermally tunable Fano resonator obtained by asymmetrically coupling a conductive rubberbased H-shaped split ring resonator (SRR) and a copper 2960 |

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Section: Resultsmentioning

confidence: 99%

Experimental study on the microwave processing of waste tyre rubber aggregates to enhance their surface properties for their use in rubberized bituminous mixtures

Ateeq

Al-Shamma’a

2017

Micro & Optical Tech Letters

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“…Every year, nearly 3 million tons of waste tires are generated in Europe, of which approximately 2 million tons are either recycled or recovered, as reported by the European Tyre & Rubber Manufacturers' Association. Composed in the majority by highly engineered rubber, the non-biodegradable stage of the final tire product is involved in several waste management problems [1,2]. ELTs usually enter a waste management system based on recycling the constituent materials and the recovery of energy by controlled combustion, and still, in some countries, on the landfilling in vast land surfaces.…”

Section: Introductionmentioning

confidence: 99%

“…To counteract this phenomenon, several methods aiming to control the swelling behavior of rubber exist. The addition of chemicals to the mixture [13,14], the possible devulcanization [15][16][17][18] or, last but not least, the surface treatment of the CR employing physical or chemical procedures [1,[19][20][21][22][23] are some of the most frequent solutions. The rubber's surface treatment represents an evolving method, preferably used when the dry incorporation method is adopted.…”

Section: Introductionmentioning

confidence: 99%

Functionalization of Crumb Rubber Surface for the Incorporation into Asphalt Layers of Reduced Stiffness: An Overview of Existing Treatment Approaches

et al. 2021

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The substitution of mineral aggregates with crumb rubber (CR) from waste end-of-life tires (ELTs) in the asphalt concretes, has been considered a sustainable paving industry approach. The rubber has been used to construct pavements with proven enhanced resilience and improved durability. However, some issues related to the rubber’s surface adhesion or swelling may arise with these practices and generate complications (binder consumption, temperatures, mixing times). One possible solution to overcome the materials’ compatibility problems is to pre-treat the CR’s surface before its incorporation into the asphalt mixes to allow a surface functionalization that can enhance coverage and cohesion inside the mixes. The physical treatments using radiations-based beam are already exploited in the plastic recycling industries avoiding the use of chemicals in considerable amounts. Such treatments permit the recovering of large quantities of polymer-based materials and the enhancement of interfacial properties. This article provides an overview of existing surface treatments of polymers and especially rubber, including gamma ray, UV-ozone, microwaves, and plasma. Several studies have shown an overall improvement of the rubber surface’s reactive properties due to contaminant removal or roughness enhancement attributed to cross-linking or scission reactions occurring on the rubber’s surface layer. With those properties, the asphalt mixes’ phase stability properties are increased when the pre-treated rubber is incorporated. The treatments would permit to increase the CR quantities, yet reduce the layer stiffness, and improve the durability and the sustainability of future advanced road pavements.

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Chemical surface etching methods for ground tire rubber as sustainable approach for environmentally-friendly composites development– a review

Phiri

Formela

et al. 2021

Composites Part B: Engineering

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Experimental study on the optimisation of chemical treatment to reduce waste rubber aggregates absorption properties

Abstract: Experimental study on the optimisation of chemical treatment to reduce waste rubber aggregates absorption properties http://researchonline.ljmu.ac.uk/id/eprint/4104/ Article LJMU has developed LJMU Research Online for users to access the research output of the University more effectively.

Cited by 7 publications

References 24 publications

Experimental study on the microwave processing of waste tyre rubber aggregates to enhance their surface properties for their use in rubberized bituminous mixtures

Experimental study on the microwave processing of waste tyre rubber aggregates to enhance their surface properties for their use in rubberized bituminous mixtures

Functionalization of Crumb Rubber Surface for the Incorporation into Asphalt Layers of Reduced Stiffness: An Overview of Existing Treatment Approaches

Chemical surface etching methods for ground tire rubber as sustainable approach for environmentally-friendly composites development– a review

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