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Global warming potential and energy consumption of temporary works in building construction: A case study in Hong Kong

机译:建筑物临时工程的全球暖化潜力和能源消耗:以香港为例

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The importance of the building industry on environmental impacts, especially global warming potential (GWP) impact due to greenhouse gases emissions is undisputed. Thus, significant efforts have been devoted to minimize environmental impacts and waste management problems from building construction globally. Numerous studies have particularly focused on assessing the environmental impacts of buildings based on materials, construction processes and whole building systems. However, less attention has been given on some critical features, especially on temporary works (e.g., hoarding system). But the temporary works also consume considerable amounts of materials and generate significant amounts of waste due to its short service life time. Therefore, this study evaluated the environmental impacts of hoarding systems as a case study in Hong Kong with the aim to identify the areas of impacts reduction and improvements in its waste management system. A case-specific structured questionnaire survey was conducted to the relevant stakeholders to identify the essential materials, and construction, deconstruction and waste management processes of hoarding systems, whereas life cycle assessment was employed to assess the associated environmental impacts. The findings demonstrated that more than 3 tonnes of CO2eq GWP and 39 GJ of non-renewable energy consumption impacts were associated with 1 m of hoarding construction. This is mainly due to the use of large amounts of steel products and concrete in the construction of the hoarding system. This results and analysis can help the building industry to identify the opportunity for reducing environmental impacts, and facilitate resource-efficient and effective design of hoarding systems.
机译:毫无疑问,建筑业对环境影响的重要性,尤其是温室气体排放对全球变暖潜势(GWP)的影响。因此,已经做出了巨大的努力以最小化全球建筑施工对环境的影响和废物管理问题。许多研究特别关注基于材料,施工过程和整个建筑系统评估建筑物对环境的影响。但是,对于某些关键特征,特别是对临时工程(例如,ing积系统)的关注较少。但是,由于临时工作寿命短,因此临时工作也会消耗大量材料并产生大量废物。因此,本研究以香港为例,评估了systems积系统对环境的影响,旨在确定减少和改善废弃物管理系统的领域。针对相关利益相关者进行了针对特定案例的结构化问卷调查,以识别essential积系统的基本材料,构造,解构和废物管理流程,同时采用生命周期评估来评估相关的环境影响。调查结果表明,超过3吨的CO2eq GWP和39 GJ的不可再生能源消耗影响与1 m的ho积建筑有关。这主要是由于在the积系统的构造中使用了大量的钢材和混凝土。这些结果和分析可以帮助建筑行业确定减少环境影响的机会,并促进资源节约和有效设计of积系统。

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