持続可能な建設のための低炭素建築材料：環境性能、課題、今後の研究方向
Low-carbon building materials for sustainable construction: environmental performance, challenges and future research directions (原題)
Ursula Maíra Maciel Rigon Leão
🤖 gxceed AI 要約
日本語
2020〜2025年の高影響論文20本を対象とした構造化レビュー。セメント代替混和材で最大25%、ジオポリマーで69〜77%の温暖化係数削減、CLT躯体が全ライフサイクル炭素で最小（119 kgCO2/m²）である一方、生物起源炭素の計時や廃棄前提に強く依存することを示す。リサイクル材・可逆構造で最大65%削減が可能だが、手法標準化の欠如とサプライチェーン制約が普及の障壁であり、動的・ハイブリッドLCAと機械学習による材料スクリーニングの必要性を結論づける。
English
Structured review of 20 high-impact studies (2020–2025) on low-carbon building materials and LCA methods. SCMs and alternative binders cut GWP by up to 25%, geopolymers by 69–77%, and mass timber/CLT shows the lowest median whole-life embodied carbon (119 vs 185 kgCO2/m² for concrete, 228 for steel), though results hinge on biogenic carbon timing and end-of-life assumptions. Recycled and reversible assemblies can cut life-cycle impacts up to 65%, but methodological standardization gaps, supply bottlenecks, and fragmented databases block scale-up; dynamic/hybrid LCA plus ML material screening are proposed as the path to verifiable net-zero buildings.
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（カテゴリ1・2）算定やSSBJのバリューチェーン開示において、資材別の embodied carbon 原単位とLCA手法の限界を整理する材料になる。不動産・建設企業のScope 3削減目標設定やグリーンビルディング認証対応の実務判断に資する。
In the global GX context
Directly informs Scope 3 category 1/2 accounting and whole-life carbon disclosure for the built environment under ISSB/CSRD and green building certification regimes. The call for dynamic, hybrid LCA and standardized databases speaks to the broader disclosure-infrastructure gap in embodied carbon reporting.
👥 読者別の含意
🔬研究者:資材別 embodied carbon の比較値とLCA手法論の課題を整理した出発点として活用できる。
🏢実務担当者:建設・不動産のScope 3算定や資材選定において、低炭素材料の削減幅と前提条件の不確実性を把握できる。
🏛政策担当者:建築物のwhole-life carbon規制やLCAデータベース標準化の政策設計に示唆を与える。
📄 Abstract（原文）
The urgent need to decarbonize the built environment has shifted academic and industrial attention toward the mitigation of upfront greenhouse gas emissions. This paper presents a structured literature review of 20 high-impact peer-reviewed studies published between 2020 and 2025, evaluating the development, environmental performance, and life cycle assessment (LCA) methodologies of low-carbon building materials. Synthesized findings demonstrate that cement reduction via supplementary cementitious materials (SCMs) and alternative binders remains the most practical path for concrete decarbonization, yielding up to 25% global warming potential reductions, while advanced geopolymer systems achieve 69% to 77% embodied carbon savings. Mass timber and cross-laminated timber (CLT) superstructure configurations exhibit the lowest median whole-life embodied carbon (119 kgCO2/m² compared to 185 kgCO2/m² for concrete and 228 kgCO2/m² for steel), although their net benefit is highly sensitive to biogenic carbon timing and end-of-life assumptions. Circular and recycled construction materials, including recycled aggregate concrete and reversible structural assemblies, can reduce life-cycle environmental impacts by up to 65%. However, widespread scalability is hindered by a lack of methodological standardization, supply chain bottlenecks, and database fragmentation. We conclude that transitioning from static, narrow-boundary assessments to dynamic and hybrid LCA frameworks, supported by machine learning material screening, is crucial to achieving verifiable net-zero carbon building delivery.
🔗 Provenance — このレコードを発見したソース
- openalex https://sustenere.inf.br/index.php/engineeringsciences/article/view/8939first seen 2026-10-28 04:53:23 · last seen 2026-11-04 04:51:42
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