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Greenhouse gas balances in building construction: wood versus concrete from life-cycle and forest land-use perspectives

机译:建筑施工中的温室气体平衡:从生命周期和森林土地利用的角度看木材与混凝土的对比

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摘要

In this paper, primary energy use and carbon dioxide (CO_2) and methane (CH_4) emissions from the construction of multi-storey building, with either a wood or a concrete frame, were calculated from life-cycle and forest land-use perspectives. The primary energy input (mainly fossil fuels) in the production of building materials was found to be about 60-80/100 higher when concrete frames were consdiered instead of wood frames. The net greenhyouse gas (GHG) balance for wood materials will depend strongly on how the wood is handled after demolition of the building. The net GHG balance will be slightly positive if all the demolition wood is used to replace fossil fuels, slightly negative if part of the demolition wood is re-used, and clearly positive if all wood is deposited in landfills, due to the production of CH_4.
机译:本文从生命周期和森林土地利用的角度,计算了用木头或混凝土框架建造的多层建筑的一次能源使用以及二氧化碳(CO_2)和甲烷(CH_4)的排放量。当考虑用混凝土框架代替木框架时,发现建筑材料生产中的主要能源输入(主要是化石燃料)要高出约60-80 / 100。木质材料的净绿液气体(GHG)净平衡将在很大程度上取决于建筑物拆除后如何处理木材。如果所有分解木材都用于替代化石燃料,则温室气体净余额将略为正;如果部分分解木材被重新利用,则净温室气体余额将为负;如果由于CH_4的产生而将所有木材沉积在垃圾填埋场中,则净温室气体余额将明显为正。 。

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