□□□□□□□□ □□ □ □□□□□□□□□□□□□ ＋□□□□□ □□□□□□□□□□□□□□□□□□□□□□□ □□ □ □□□□□□□□□□□□□ □□□□□□□□□ □□□□ □ □□□□□ □□□□□□ □□□□□□□□□□□□□□□□ □□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□Wood-aluminum composite CW70% RA □□□□□□□□□□□□□□□□□□□□□□□□□□□□Aluminum CW23% RAWood-aluminum composite CW23% RA □□□□□□□□ □□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□ □□□□□□□□□□□ □□□□Tokyo University of Science □□□□□□□- Towards the Social Implementation of Environmentally Conscious Buildings - This project aims to promote the social implementation of environmentally conscious buildings (see Fig.1) by developing a system that evaluates and visualizes CO₂ emissions from non-structural components throughout their entire life cycle. Concurrently, the project will advance the research and development of high-performance materials and construction methods that minimize CO₂ emissions during manufacturing and construction. The target components are exterior and interior finishes, openings, and base materials. This project, which began in the 2022 financial year, comprises four working groups (WGs) that are developing materials and construction methods. At the same time, WG0 is integrating the knowledge gained from these groups to conduct an environmental impact assessment. Here are some of the results. Some of the key outcomes from this project are summarized here.(1)Development of a new curtain wall using aluminum sashes WG3, led by Dr. Takase, is developing a new curtain wall(CW) (Fig.2) with high thermal performance by combining wood and recycled aluminum composite frames with Low-E triple glazing. In the curtain wall design, three key points were identified for carbon reduction: high thermal insulation/heat reflection, use of recycled aluminum, and utilization of wood. Fig. 2 Cross-sectional view of CW composite made from wood and recycled aluminum Comprehensive performance evaluation was conducted from an life-cycle CO₂ (LCCO₂) perspective using an embodied carbon calculation tool and thermal load simulation. As a result, for example, when analyzing embodied carbon by component (Fig.3), the wood-aluminum composite CW using 70% recycled aluminum reduces CO₂ emissions by 39%, and the CO₂ reduction rate compared to aluminum CW is 34%, demonstrating significant effectiveness.(2) Texture Printing WG1, led by Dr. Kanematsu, is aiming to realize texture printing technology that enables the printing of arbitrary textures. For example, as a completely new finishing technique for concrete surfaces, they are developing technology to reproduce free textures and colors using UV printers, as well as methods for applying glaze. By combining with texture printing technology, they have successfully achieved arbitrary textures as shown in Fig.4, while also demonstrating the superiority of these technologies in terms of LCCO2.(3) Towards Phase 2 In Phase 2, based on the knowledge and technical seeds obtained in Phase 1, we will reorganize into five working groups and promote research and development aimed at further social implementation, while also establishing evaluation methods for environmentally conscious architecture.Fig. 3 Breakdown of CO2 emissions by component in the manufacturing stage of CW using recycled aluminum(RA)Fig. 4 Various textures achieved using the developed printing technologyFig. 1 Conceptual diagram of environmentally conscious architecture38Research ＆ Development Platform of Functional Green Building Materials
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