| Summary: | 碩士 === 國立臺灣大學 === 環境工程學研究所 === 104 === The consumption of building materials and constructions is growing rapidly, because of the increase of population and urbanization. Under the huge demand of building materials, more natural resource will be exploited, causing serious environmental damage. This research focuses on the effects of increasing efficiency and recycling of construction materials. The research defines Taipei and New Taipei City as a research area, and Reinforced Concrete (RC), Steel Structure (SS) and Steel Reinforced Concrete (SRC) construction are chosen. The chosen building materials are steel, concrete and aluminum for the calculation of material demand and recycling. In addition to assessing the urban metabolism of building materials, the research also focuses on accessing efficiency and recycling in Taipei and New Taipei City.
The result shows that if Taipei and New Taipei City replace concrete construction with steel construction, use recycled building materials to replace natural material and lengthen the life cycle of the building, then Taipei’s recycled steel material and aluminum material can meet about 90% of the total demand for building materials; for New Taipei City, the recycled steel material is about 67% and aluminum material is about 80%. The efficiency ratio of Taipei and New Taipei City: Taipei’s steel is 0.94, aluminum 1.87; New Taipei City’s steel is 0.58, aluminum 1.42.The efficiency ratio shows that New Taipei City are relatively lower than Taipei. The research suggests that the government should replace concrete structure by steel structure. It is because steel structure is more environmental friendly than concrete structure. Also, extend building life cycle and improve recycling and efficiency of construction materials to replace the natural demand of building materials can achieve lower consumption and carbon dioxide emissions of natural building materials.
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