天然砂依存を緩和した低コスト・低炭素ジオポリマーコンクリートの製造
A Cost-Effective and Low-Carbon Geopolymer Concrete Production by Mitigating Natural Sand Dependency (原題)
Siba Sankar Chanda, Shyamal Guchhait, Suman Roy
🤖 gxceed AI 要約
日本語
フライアッシュと高炉スラグを結合材とし、天然細骨材の一部を破砕鋼炉スラグで代替したジオポリマーコンクリートを実験的に検討。50%代替が力学強度・コスト・CO2排出の最適バランスとなることを示した。強度予測モデルも実験値と高い適合性を示した。
English
This study develops a geopolymer concrete using fly ash and ground granulated blast furnace slag binders, partially replacing natural fine aggregate with crushed steel furnace slag. A 50% replacement was found optimal, balancing mechanical strength, cost reduction, and CO2 emission reduction versus conventional concrete. Prediction models matched experimental results well.
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
建設分野の素材レベルでの脱炭素はScope 3排出削減やグリーン調達に直結しうるが、本論文は材料物性とコスト評価が中心で、日本のSSBJ開示や政策との直接的な接点は限定的。建設・素材企業の排出原単位改善の参考事例として読める。
In the global GX context
Embodied-carbon reduction in construction materials feeds directly into Scope 3 accounting and green procurement under CSRD and ISSB. The paper offers material-level evidence on cost and CO2 trade-offs, though it does not engage disclosure frameworks directly.
👥 読者別の含意
🔬研究者:産業廃棄物を用いた低炭素結合材・骨材代替の力学・微細構造・CO2評価の実証データとして参照できる。
🏢実務担当者:建設・素材企業がScope 3排出原単位の改善や副産物活用の検討に際し、コストとCO2のトレードオフ評価の一事例として活用できる。
🏛政策担当者:建設資材の脱炭素化や産業副産物の有効利用促進策を検討する際の基礎的知見になりうる。
📄 Abstract（原文）
Abstract Geopolymer concrete, recognized for its reduced carbon footprint, presents an environmentally friendly alternative to conventional concrete. However, the limited availability of natural fine aggregates poses a significant challenge, even for geopolymer concrete. This study investigated the mechanical and microstructural properties of a novel geopolymer concrete that partially replaces natural fine aggregates with crushed steel furnace slag, a type of industrial waste. The mix design of the novel geopolymer concrete consisted of a 50 ∶ 50 mixture of fly ash and ground granulated blast furnace slag as binders, and varying proportions of crushed steel furnace slag as a partial replacement for natural fine aggregates, activated by a 12 M alkaline solution. In the first phase of the study, the workability and mechanical characteristics of the novel geopolymer concrete were investigated. The study’s second phase focused on the microstructural characteristics of the geopolymer concrete. The dependency of the strength parameters was also evaluated. Based on the mechanical and microstructural characteristics, an optimized quantity of crushed steel furnace slag was determined as a replacement for natural fine aggregates, without significantly affecting the properties of the geopolymer concrete. The proposed prediction models exhibited excellent agreement with the experimental results, as confirmed by high R -squared values, demonstrating a reliable forecast of the mechanical performance of CSFS-based geopolymer concrete, in line with existing literature and codal provisions of ACI 209R and Eurocode 2. Finally, a carbon dioxide emission and cost–benefit analysis was performed to determine the environmental and economic advantages of the optimized geopolymer concrete over conventional concrete. It was observed that geopolymer concrete made by replacing 50% of natural fine particles served as an optimum mix, providing an optimal balance of mechanical strength, cost reduction, and carbon dioxide emission reduction when compared to conventional concrete.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1061/jmcee7.mteng-24555first seen 2026-10-29 04:49:06 · last seen 2026-11-06 04:49:54
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