鉄筋コンクリート壁体の生産と運用におけるエクセルギー消費

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This paper describes how exergy stored in reinforced concrete walls are consumed at the stages of production and use. In the production of iron bars reinforcing concrete, 83% of the supplied exergy which includes the exergy of fossil fuels, raw materials, and water is consumed; the rest, namely 17%, is fixed within the bars. In the course of the use of the iron bars, 2 out of 17 of the fixed exergy is consumed due to degradation. In the production of concrete, 80% of the supplied exergy which includes the exergy of fossil fuels, raw materials, and water is consumed; the rest, namely 20%, is fixed within the concrete. In the course of the use of concrete, 5 out of 20% of the fixed exergy is consumed. Wall finish affects the amount of exergy consumption in the course of the use of the reinforced concrete walls. The rate of exergy consumption becomes smaller in the following order : no-finish, painted, mortared, and tiled. To make a good use of fossil fuels and raw materials, it is important that the fixed exergy within the walls is consumed as slow as possible.
社団法人日本建築学会の論文
1999-06-30