フライアッシュ・GGBS・シリカフュームを混和した持続可能コンクリートのBIMベース躯体炭素評価：バーレーンにおける要素から建物への段階的フレームワーク
BIM-Based Embodied-Carbon Assessment of Sustainable Concrete Mixtures Incorporating Fly Ash, GGBS, and Silica Fume: A Progressive Element-to-Building Framework for Bahrain (原題)
Zakareya Altaitoon, Mohamed Meshaly
🤖 gxceed AI 要約
日本語
BIM（Revit）の数量抽出とIDEMATのGWP係数を組み合わせ、要素から建物へ段階的に躯体炭素を評価する枠組みを構築した。標準梁で25種の配合を比較し、OPCの119.7kg CO2eに対し三元SCM混和（T5）は75.7kgへ低減。バーレーンの住宅2棟では構造系GWPが94.99tから60.05tへ約36.8%削減された。
English
This study builds a progressive element-to-building framework combining Revit quantity takeoff with IDEMAT GWP factors to assess embodied carbon of concrete. Screening 25 mixtures on a standard beam, ternary SCM blends cut emissions from 119.7 to 75.7 kg CO2e per beam. Applied to two Bahraini residential BIM models, structural GWP fell ~36.8% (94.99 to 60.05 t CO2e).
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
建設セクターのScope 3（購入資材）算定やSSBJ対応では躯体炭素の定量化が課題となる。BIM連携で資材数量と炭素を紐付ける手法は、国内ゼネコン・設計事務所のLCA実務に示唆を与える。
In the global GX context
Embodied carbon in construction is a growing focus under CSRD/ISSB Scope 3 Category 1 and green building standards. Linking BIM quantities to GWP factors offers a replicable pathway for project-scale material comparison, though it stops short of whole-life carbon accounting.
👥 読者別の含意
🔬研究者:BIM数量とGWP係数を統合した要素→建物の段階的評価手法と、SCM配合スクリーニングの実証例を参考にできる。
🏢実務担当者:設計段階でBIMから躯体炭素を概算し、SCM混和による削減効果を比較検討する実務に活用できる。
🏛政策担当者:建設資材の炭素削減を促す規制・調達基準の設計において、BIMベースの定量評価の有用性を示す。
📄 Abstract（原文）
Reducing the carbon emissions associated with reinforced-concrete materials requires effective comparison of material alternatives before project-scale implementation. This study develops and demonstrates a progressive element-to-building environmental assessment framework that combines quantity extraction from Autodesk Revit with global warming potential (GWP) factors obtained from IDEMAT. Following benchmark checks, a standardized reinforced-concrete beam measuring 3.0 m × 0.20 m × 0.40 m was used to screen 25 concrete mixture scenarios comprising ordinary Portland cement (OPC), single supplementary cementitious materials (SCMs), binary SCM blends, and ternary SCM blends. Selected scenarios were subsequently applied to two residential building information modeling (BIM) models in Bahrain. Assuming a common target compressive strength of 35 MPa, the calculated carbon emissions per beam were 119.7 kg CO2e for OPC concrete, compared with 76.8, 76.5, and 75.7 kg CO2e for the G60, B6, and T5 mixtures, respectively. Across the two residential buildings, the calculated structural-system GWP decreased from 94.99 t CO2e for OPC to 60.05 t CO2e for T5, representing a reduction of approximately 36.8%. These comparisons are conditional on the adopted mixture assumptions and emission factors; equivalent mechanical and durability performance was not experimentally verified. The assessment is limited to the defined system boundary and does not constitute a whole-life carbon assessment. BIM enables project-scale comparisons by linking environmental estimates to material quantities and their distribution across structural elements.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.3390/buildings16214352first seen 2026-11-05 06:06:26
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