Georgy Lazorenko , Ekaterina Kravchenko , Anton Kasprzhitskii , Elham H. Fini
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It was observed that when replacing natural aggregates with PET waste to the maximum extent, the global warming potential (GWP) in the category of emissions related to aggregate preparation increased by 16.7 %. This increase was attributed to significant emissions generated during PET processing, including activities such as washing and grinding. The total GWP to produce one cubic meter of geopolymer mixture was 643.55 kgCO<sub>2</sub>-e without PET aggregates and 667.86 kgCO<sub>2</sub>-e with maximum use of PET aggregates. The optimization of energy-intensive PET preparation processes led to a remarkable reduction of 19.63 % for production of geopolymer mixture with maximum use of PET aggregates. 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引用次数: 0
摘要
减少碳排放和寻求水泥基材料的可持续替代品势在必行,这推动了土工聚合物粘结剂的发展。使用土工聚合物有可能显著减少温室气体排放。此外,将塑料废弃物作为骨料不仅能节约资源,还能实现环境的可持续发展。本研究对以粉煤灰为前体、聚对苯二甲酸乙二酯(PET)废料为天然骨料替代物的土工聚合物的使用进行了全面的生命周期评估。据观察,当最大限度地用 PET 废弃物替代天然集料时,与集料制备相关的排放类别中的全球升温潜能值(GWP)增加了 16.7%。这一增加归因于 PET 加工过程中产生的大量排放,包括清洗和研磨等活动。在不使用 PET 骨料的情况下,生产一立方米土工聚合物混合物的全球升温潜能值为 643.55 kgCO2-e,在最大程度使用 PET 骨料的情况下为 667.86 kgCO2-e。通过优化能源密集型 PET 制备工艺,在最大限度使用 PET 骨料的情况下,生产土工聚合物混合物的全球升温潜能值显著降低了 19.63%。这些研究结果表明,土工聚合物混合物的生产具有改善可持续性的潜力,并强调了优化生产工艺在减轻其环境影响方面的关键作用。
An evaluation of the environmental impact and energy efficiency of producing geopolymer mortar with plastic aggregates
The imperative to mitigate carbon emissions and seek sustainable alternatives to cementitious materials has driven the advancement of geopolymer binders, which are inorganic binders of aluminosilicate industrial-waste materials activated by alkaline agents. The use of geopolymers carries the potential for significant reductions in greenhouse gas emission. Furthermore, the incorporation of plastic waste as aggregates addresses not only resource conservation but also environmental sustainability. This study conducted a comprehensive life-cycle assessment of the use of geopolymers from fly ash as a precursor with polyethylene terephthalate (PET) waste as a substitute for natural aggregates. It was observed that when replacing natural aggregates with PET waste to the maximum extent, the global warming potential (GWP) in the category of emissions related to aggregate preparation increased by 16.7 %. This increase was attributed to significant emissions generated during PET processing, including activities such as washing and grinding. The total GWP to produce one cubic meter of geopolymer mixture was 643.55 kgCO2-e without PET aggregates and 667.86 kgCO2-e with maximum use of PET aggregates. The optimization of energy-intensive PET preparation processes led to a remarkable reduction of 19.63 % for production of geopolymer mixture with maximum use of PET aggregates. These findings show the potential for improved sustainability in the production of geopolymer mixtures and emphasize the critical role of optimizing the production processes in mitigating their environmental impact.