Diego Alvarez, Tetsu Kubota, Hanief Sani, Usep Surahman, Mohamad Siarudin
The building sector is responsible for 39% of GHG emissions resulting from the world energy consumption and for 25% of the residues worldwide, thus, any effort in tackling its environmental impact is important for climate change adaptation. Wood offers more sustainable building materials, and unlike reinforced concrete (RC) or steel, wood production and use require less energy and release less CO2. This research analyzes the environmental benefits of Glulam (Glue-laminated timber) and wooden materials for residential construction in Indonesia, studying three building scenarios: a conventional study case (RC), a "hybrid"scenario, and a "wooden"scenario. Building Information Modeling (BIM) was used to calculate the bill of quantities (BoQ), then, embodied energy (EE) and embodied CO2 (ECO2) emissions among the three scenarios were compared, using a hybrid-based input-output (I-O) analysis utilizing the latest available national level Indonesian I-O 2024, and data from an Indonesian Glulam manufacturer. This study found an EE & ECO2 decrease of around 16% in the hybrid scenario, and 31% in the wooden scenario, when compared with conventional construction. Using Glulam and wooden materials contributed to foundation material optimization and the best alternative for biogenic carbon storage was domestic species, which stored more carbon than imported alternatives. © Published under licence by IOP Publishing Ltd.
Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima, Japan; Department of Architecture, Universitas Pendidikan Indonesia, Bandung, Indonesia; National Research and Innovation Agency, Cibinong, Bogor, Indonesia
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