Sustainable Practice in Pavement Engineering through Value-Added Collective Recycling of Waste Plastic and Waste Tyre Rubber

Xu, Xiong; Leng, Zhen; Lan, Jingting; Wang, Wei; Yu, Jianying; Bai, Yawei; Sreeram, Anand; Hu, Jing

doi:10.1016/j.eng.2020.08.020

Cited by 126 publications

(40 citation statements)

References 41 publications

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“…Another approach was to use triethylenetetramine (TETA) to carry out aminolytic depolymerization at 140°C, and the depolymerization products were blended with bitumen as modifiers to improve moisture and crack-resistance of asphalt pavement (Scheme 4c-f). [144] Antimicrobial polyionenes can also be synthesized by aminolytic depolymerization and subsequent addition polymerization, which can have highvalue applications in the biomedical sector (Scheme 4g,h). [145] Fiber-reinforced plastics (FRPs) are special engineered materials that are lightweight but have high strength and stiffness and are most suitable for weight-sensitive high-value applications, such as in aerospace and automotive parts, wind turbines, sports equipment, and others.…”

Section: Polyethylene Terephthalatementioning

confidence: 99%

Strategic Approach Towards Plastic Waste Valorization: Challenges and Promising Chemical Upcycling Possibilities

et al. 2021

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Plastic waste, which is one of the major sources of pollution in the landfills and oceans, has raised global concern, primarily due to the huge production rate, high durability, and the lack of utilization of the available waste management techniques. Recycling methods are preferable to reduce the impact of plastic pollution to some extent. However, most of the recycling techniques are associated with different drawbacks, high cost and downgrading of product quality being among the notable ones. The sustainable option here is to upcycle the plastic waste to create high-value materials to compensate for the cost of production. Several upcycling techniques are constantly being investigated and explored, which is currently the only economical option to resolve the plastic waste issue. This Review provides a comprehensive insight on the promising chemical routes available for upcycling of the most widely used plastic and mixed plastic wastes. The challenges inherent to these processes, the recent advances, and the significant role of the science and research community in resolving these issues are further emphasized.

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Section: Polyethylene Terephthalatementioning

confidence: 99%

Strategic Approach Towards Plastic Waste Valorization: Challenges and Promising Chemical Upcycling Possibilities

et al. 2021

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“…The recycled tire polyester cord is widely used in the production of cement and concrete, both mixed with rubber crumb [5,6] and cleaned [7,8]. The same raw material [9], or only crumb rubber [10], could be used as bitumen modifiers or reinforcement materials for expansive soils [11]. The newest application for recycled tire cord components is 3D printing using polyethylene terephthalate [12] or crumb rubber [13,14].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Polyester Tire Cord Glycolysis Accompanied by Rubber Crumb Devulcanization

et al. 2022

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A new method for the recycling of a polyester tire cord under the action of oligoethylene terephthalates, bis(2-hydroxyethyl) terephthalate and ethylene glycol has been proposed. The method involves simultaneous homogeneous glycolysis of polyethylene terephthalate and devulcanization of crumb rubber. Polyester cord and glycolysates were characterized by FTIR spectroscopy and gel permeation chromatography (GPC). The devulcanization process was investigated by swelling-based methods. The rate of the proposed method of homogeneous glycolysis in a melt phase was proved to be higher than one of the heterogeneous glycolysis. The assumption of a more efficient devulcanization in the presence of a softener was also confirmed. The degree of devulcanization 46.07%, the apparent degree of swelling 167.4%, and the apparent swelling rate constant 0.0902 min−1 were achieved. The results indicate that the proposed method made it possible to carry out the glycolysis of the polyester cord of the tire more deeply than the known heterogeneous glycolysis with various agents, but further research is needed for industrial implementation.

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“…According to the hypotheses developed, and taking as a basis a new circular economy in which waste is the raw material for new materials [3], various research projects have been carried out in which industrial by-products were used in bituminous mixtures [4,5]. The wastes used in bituminous mixes have been ladle furnace slag [6,7], electric arc furnace slag [8], reclaimed asphalt pavement [9,10], scrap tyres [11], recycled glass [12], ceramic dust [13], etc. In most cases, the results were acceptable and demonstrated the feasibility of incorporating waste into bituminous mixtures for roads, reducing the environmental impact through their use [14].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Physical, Chemical, and Environmental Properties of Biomass Bottom Ash for Use as a Filler in Bituminous Mixtures

et al. 2021

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The road construction sector is one of the most raw material-intensive sectors in existence. As a result, it has a significant impact on the environment. For this reason, there are several research projects in which industrial by-products are used as raw materials. In turn, energy production from biomass combustion is considered to be one of the most promising energy sources. However, this type of energy produces a number of wastes that need to be treated, such as biomass bottom ash. This research evaluates the properties of biomass bottom ash for use as a filler in bituminous mixtures and quantifies the environmental advantages of its use. For this purpose, the chemical composition of the ashes was analysed and their properties were physically characterised to confirm their suitability as a filler. Subsequently, the advantages of its processing compared to limestone filler, lime, or cement were calculated with SimaPro software. The results showed acceptable properties of biomass bottom ash for use as a filler, as well as a drastic reduction in the environmental impact of its processing. In short, this research presents the basis for the development of further bituminous mixtures with biomass bottom ash, reducing the extraction of raw materials and avoiding landfill disposal.

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Sustainable Practice in Pavement Engineering through Value-Added Collective Recycling of Waste Plastic and Waste Tyre Rubber

Cited by 126 publications

References 41 publications

Strategic Approach Towards Plastic Waste Valorization: Challenges and Promising Chemical Upcycling Possibilities

Strategic Approach Towards Plastic Waste Valorization: Challenges and Promising Chemical Upcycling Possibilities

Investigation of Polyester Tire Cord Glycolysis Accompanied by Rubber Crumb Devulcanization

Evaluation of Physical, Chemical, and Environmental Properties of Biomass Bottom Ash for Use as a Filler in Bituminous Mixtures

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