産業副産物を用いたバイオセメント固化コンクリートによる低炭素都市インフラ
Bio-Cemented Concrete with Industrial By-Products for Low-Carbon Urban Infrastructure (原題)
Julian Fairmont, Eleanor Wren
🤖 gxceed AI 要約
日本語
フライアッシュと高炉スラグ微粉末、微生物誘導炭酸カルシウム析出を組み合わせた低炭素バイオセメントコンクリートを検討。ハイブリッド配合は圧縮強度46.8MPaと従来比22.5%向上し、塩化物抵抗性や透水性も改善。埋め込み炭素は385.0から121.2 kg CO2-eq/m³へ68.52%削減され、高性能かつ低炭素な都市インフラへの道筋を示した。
English
This study developed low-carbon bio-cemented concrete combining fly ash, GGBS, and Sporosarcina pasteurii-induced calcite precipitation. The hybrid mix achieved 46.8 MPa compressive strength (22.5% above control) with improved durability and chloride resistance. Embodied carbon dropped 68.52% (385.0 to 121.2 kg CO2-eq/m³), offering a high-performance, low-carbon pathway for urban infrastructure.
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
建設業の脱炭素はScope 3排出削減の重要領域であり、本研究成果は国内ゼネコンや建材メーカーの低炭素コンクリート調達・開発戦略に資する。SSBJや有報でのScope 3開示強化を見据え、素材レベルでの削減根拠として活用可能。
In the global GX context
As construction accounts for ~8% of global CO2, this bio-cemented concrete offers a scalable material-level decarbonization lever relevant to CSRD/ISSB Scope 3 reporting and green building certification. It adds empirical evidence on dual by-product substitution with microbial treatment, supporting transition finance for low-carbon infrastructure.
👥 読者別の含意
🔬研究者:微生物固化と副産物複合による強度・耐久性・炭素削減のトレードオフを定量化した点が参考になる。
🏢実務担当者:低炭素コンクリートの調達・仕様検討において、強度と炭素削減を両立する配合設計の実例として活用できる。
🏛政策担当者:建設分野の脱炭素政策やグリーン公共調達基準において、材料レベルでの削減ポテンシャルを示すエビデンスとなる。
📄 Abstract（原文）
The construction industry faces increasing pressure to reduce the environmental impacts associated with Ordinary Portland Cement (OPC) production while maintaining the performance requirements of modern infrastructure. This study investigated the feasibility of producing low-carbon bio-cemented concrete through the combined use of Fly Ash, Ground Granulated Blast Furnace Slag (GGBS), and Sporosarcina pasteurii-induced microbial calcite precipitation. Four concrete mixtures, consisting of a conventional OPC control and three bio-cemented variants, were evaluated through mechanical, durability, microstructural, and environmental assessments. The results showed that the hybrid mixture (BIO-HYB) achieved the highest 28-day compressive strength of 46.8 MPa, exceeding the control concrete (38.2 MPa) by approximately 22.5%. BIO-HYB also exhibited superior tensile strength (4.15 MPa), flexural strength (6.22 MPa), durability index (14.95), and chloride resistance (640 Coulombs). Water permeability was reduced from 4.25 × 10⁻¹² m/s in the control mixture to 0.88 × 10⁻¹² m/s, indicating substantial pore refinement. SEM observations confirmed extensive calcite deposition within pores and microcracks, resulting in a denser internal structure. Furthermore, embodied carbon decreased from 385.0 to 121.2 kg CO₂-eq/m³, corresponding to a 68.52% reduction in Global Warming Potential. The novelty of this study lies in integrating microbial calcite precipitation with dual industrial by-product substitution using Fly Ash and GGBS within a structural concrete system while simultaneously evaluating its engineering and environmental performance. The findings demonstrate that hybrid bio-cemented concrete offers a promising pathway toward high-performance and low-carbon urban infrastructure.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.51903/9z43zg83first seen 2026-10-03 04:54:16
🔔 こうした論文の新着を逃したくない方は キーワードアラート に登録（無料・3キーワードまで）。
gxceed は公開メタデータに基づく研究支援データセットです。要約・翻訳・解説は AI 支援で生成されています。 最終的な解釈・検証は利用者が原典資料に基づいて行うことを前提とします。