A Comparative Literature-Based Life-Cycle Assessment of Supplementary Cementitious Materials in Reinforced Concrete: CO₂ Emission Reduction and Service-Life Enhancement in Saudi Arabia
鉄筋コンクリートにおける補助セメント材料の比較文献ベースライフサイクルアセスメント：サウジアラビアにおけるCO₂排出削減と耐久性向上 (AI 翻訳)
Samer Salah Sewedan
🤖 gxceed AI 要約
日本語
本論文は、サウジアラビアの厳しい環境条件下での鉄筋コンクリートにおける補助セメント材料（SCM）の環境性能と耐久性を評価した文献ベースのLCA研究である。シリカフューム、スラグ、フライアッシュ、天然ポゾランを用いたコンクリートは、従来のコンクリートと比較してCO₂排出量を15〜35%削減し、耐久性も向上することが示された。特に、ジオポリマー系で最大240 kg CO₂/m³の低排出を達成した。
English
This literature-based LCA evaluates supplementary cementitious materials (SCM) in reinforced concrete under Saudi Arabia's harsh conditions. SCM concretes reduce CO₂ emissions by 15-35% and improve durability, with geopolymer systems achieving as low as 240 kg CO₂/m³.
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
日本でもコンクリートの脱炭素化が急務であり、SCM活用は重要な選択肢だが、本論文は高温・塩害環境下での耐久性向上も考慮しており、日本の沿岸部や特殊環境への応用に参考となる。ただし、サウジアラビア特有の材料供給や気候条件が前提のため、直接適用には調整が必要。
In the global GX context
This paper contributes to global concrete decarbonization by quantifying SCM benefits in an arid, chloride-rich environment. It aligns with ISSB/TCFD emphasis on embodied carbon and durable infrastructure, and provides a methodological template for region-specific LCA.
👥 読者別の含意
🔬研究者:Provides a comprehensive literature review and quantitative comparison of SCM concretes, useful for LCA methodology and durability studies.
🏢実務担当者:Shows potential CO₂ reductions and service-life gains from SCMs, informing concrete mix design choices for sustainability.
🏛政策担当者:Supports policies promoting SCM use in construction to meet emission reduction targets, with region-specific durability evidence.
📄 Abstract（原文）
Objectives: This research assesses environmental and durability performance of reinforced concrete with supplementary cementitious materials (SCM) in Saudi Arabia. It seeks to evaluate the possibility of silica fume, slag, fly ash and natural pozzolana in the reduction of CO2 emissions, the decrease of embodied carbon and the increased service life of reinforced concrete buildings in adverse environmental conditions, especially high temperatures, chloride environments and service environments. Methods: This study used a comparative literature-based life-cycle assessment (LCA) approach guided by ISO 14040 and ISO 14044 principles. The analysis did not generate new experimental data; rather, it synthesized and harmonized data from published studies on conventional and SCM-modified reinforced concrete mixtures. The functional unit was 1 m³ of reinforced concrete. The comparison covered key life-cycle stages, including raw-material extraction, cement and SCM production, concrete production, transportation, construction, service stage, and end-of-life. Environmental indicators included global warming potential, embodied carbon, and energy consumption, while durability-related indicators such as permeability and chloride penetration resistance were used to interpret service-life implications under Saudi exposure conditions. Results: The findings demonstrate that partial replacement of ordinary Portland cement with SCMs can substantially reduce the environmental impact of reinforced concrete. SCM-based mixtures demonstrated quantifiable reductions in CO₂ emissions and energy requirements, with emission reductions of approximately 15–35%, depending on SCM type and replacement level. In the comparative case-study results, CO₂ emissions decreased from 380 kg CO₂/m³ for conventional concrete to 320 kg CO₂/m³ for silica-fume concrete, 300 kg CO₂/m³ for pozzolana concrete, 280 kg CO₂/m³ for UHPC with SCMs, and 240 kg CO₂/m³ for geopolymer-based systems. Moreover, SCM incorporation improved durability-related characteristics, including permeability and chloride-ingress resistance, indicating potential service-life enhancement under Saudi exposure conditions.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.26389/ajsrp.s150426first seen 2026-06-29 07:04:07
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