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首页> 外文期刊>Journal of Cleaner Production >Environmental sustainability for highways operation: Comparative analysis of plastic and steel screen anti-glare systems
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Environmental sustainability for highways operation: Comparative analysis of plastic and steel screen anti-glare systems

机译：高速公路运营的环境可持续性：塑料和钢制屏幕防眩光系统的对比分析

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The road construction is one of the main responsible for resource use and has been targeted as criterion development in updated versions of the Green Procurement Policy (GPP) in Europe. Although major progress was achieved in road pavements and lightning systems during the past decade, discussions on the environmental sustainability of additional road elements can advance the current understanding on how to decrease the impacts on highways. The aim of this study was to compare the potential environmental impacts of two anti-glare safety devices used on highways: the plastic (polymer-based) and the steel screen (steel-based). To this end, we applied the life cycle assessment (LCA) methodology following ISO standards based on a cradle-to-grave approach. The impacts of both anti-glare devices are driven by the main raw materials. This condition means that the weight of products is a key issue when evaluating the sustainability of the anti-glare devices. The plastic anti-glare (PAG) consumes significantly less materials and thereby presents the most favourable environmental performance for all the impact categories. For the products' manufacturing analysis, the hot-dip galvanizing was the process with higher impacts for both devices, as the setup kit of the PAG is also made from galvanized steel. Adopting sustainable strategies, e.g. product's recycling at end-of-life, use of recycled materials and product's setup with Li-ion battery, may provide an average impact reduction of 19% and 6% for the PAG and the steel screen anti-glare (SAG), respectively. A break-even situation for all the environmental impact categories occurs when the steel screen weight is reduced from 8.0 kg to less than 1.80 kg. Major attention has been addressed to road pavements and lighting system when evaluating the life-cycle impacts of highways, but our results highlight that the impacts of road sector can be offset by focusing in additional elements, such as the anti-glare device. (C) 2019 Elsevier Ltd. All rights reserved.
机译：道路建设是资源使用的主要负责人之一，在欧洲的绿色采购政策（GPP）的更新版本中，道路建设已成为标准制定的目标。尽管在过去的十年中，人行道和避雷系统取得了重大进展，但是有关其他道路元素的环境可持续性的讨论可以促进当前对如何减少对高速公路的影响的理解。这项研究的目的是比较两种用于公路的防眩光安全设备对环境的潜在影响：塑料（基于聚合物）和钢网（基于钢）。为此，我们根据从摇篮到坟墓的方法，按照ISO标准应用了生命周期评估（LCA）方法。两种防眩光装置的影响都是由主要原材料驱动的。这种情况意味着在评估防眩光设备的可持续性时，产品的重量是关键问题。塑料防眩光（PAG）消耗的材料少得多，因此对于所有冲击类别都表现出最有利的环保性能。对于产品的制造分析，热浸镀锌对两种设备的影响都更大，因为PAG的安装套件也由镀锌钢制成。采用可持续战略，例如产品的报废回收，使用回收材料以及产品使用锂离子电池的设置，可使PAG和钢网防眩光（SAG）的平均冲击降低分别为19％和6％。当钢丝网的重量从8.0千克减少到小于1.80千克时，就会出现所有环境影响类别的收支平衡。在评估高速公路的生命周期影响时，人们对道路路面和照明系统的关注已经引起了很大的关注，但是我们的研究结果强调，可以通过关注其他要素（例如防眩光装置）来抵消道路部门的影响。 （C）2019 Elsevier Ltd.保留所有权利。

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